Re: [CentOS] CentOS are Debian / Ubuntu mirror
What about the GPG keys? On Thu, May 6, 2021 at 12:05 PM Christer Solskogen < christer.solsko...@gmail.com> wrote: > On 06.05.2021 10:28, Rudi Ahlers wrote: > > I want to setup a bublic mirror server, yes, but not been successful in > > getting Debian / Ubuntu mirrors up, yet > > > > You'll only need rsync for that. > > -- > chs > > > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos > -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS are Debian / Ubuntu mirror
I want to setup a bublic mirror server, yes, but not been successful in getting Debian / Ubuntu mirrors up, yet On Tue, Apr 20, 2021 at 11:11 PM Valeri Galtsev wrote: > > > On 4/20/21 4:03 PM, Valeri Galtsev wrote: > > > > > > On 4/20/21 3:53 PM, Rudi Ahlers wrote: > >> ok, so do you simply rsync the repositories from the other distributions > >> you need? > >> > > > > I forgot to mention: before mirroring using higher tier repository: > contact their admin, ask if they do not mind that you will mirror using > them as a higher tier mirror, and tell them all details: public/private > mirror, your bandwidth, how often you plan to run sync - and ask them > what frequency of sync is OK with them. > > After you roll out and know all works, if your plan is public mirror, > next step will be to register your mirror. > > All in all, every distribution has HOWTO instruction to become their > mirror, follow these. > > And as always, use web search to find these instructions: duckduckgo is > your friend. > > Valeri > > > Short answer: yes. > > > > Long answer: > > Every repository has its own suggestion how to mirror. I do not have > > Debian mirror, my friend sysadmin in the next building maintains one, no > > need for two in the same institution. Here in my cron job script for > > mirroring CentOS (with some local details obfuscated): > > > > #== > > #!/usr/local/bin/bash > > # We use locks... > > > > touch=/usr/bin/touch > > echo=/bin/echo > > ps=/bin/ps > > cat=/bin/cat > > grep=/usr/bin/grep > > wc=/usr/bin/wc > > rm=/bin/rm > > sendmail=/usr/sbin/sendmail > > date=/bin/date > > rsync=/usr/local/bin/rsync > > # DEFAULTS > > ADDR=recipient@server > > FROM=sender@hostingmirror > > lockfile=/.../lock/centosmirror.lock > > mirror=/.../mirror/centos > > logfile=/.../mirrorlog/centos.log > > > > # check if log file exists, and create if not > > > > if [ ! -f $logfile ]; then > > $touch $logfile > > fi > > > > # check if lock exists, then bale out sending warning, > > # otherwise rsync > > > > if [ -f $lockfile ]; then > > > > # check if the process resembling lock still exists, > > # if not, just delete lock > > > > if [ "$($ps -p `$cat $lockfile` | $wc -l)" -gt 1 ]; then > > > > # Send the message > > ( > > $echo "From: $FROM" > > $echo "To: $ADDR" > > $echo "Subject: CentOS mirror failed" > > $echo "" > > $echo "CentOS mirror process bailed out as there is another process" > > $echo "with the same name and the following PID:" > > $echo "" > > $echo "`$cat $lockfile`" > > echo "" > > echo "You may want to check logs:" > > echo "" > > echo "/.../mirrorlog/centos.log" > > ) | $sendmail -F $ADDR -t > > > > else > > > > # no process, just delete the lock, and mirror > > > > $rm -f $lockfile > > > > $echo $$ > $lockfile > > $echo "`$date` started mirroring" >> $logfile > > $rsync -aqH --exclude .~tmp~/ --exclude .~tmp~ --delete > > us-msync.centos.org::CentOS /data/mirror/centos > > $echo "`$date` finished mirroring" >> $logfile > > $rm $lockfile > > > > fi > > > > else > > > > $echo $$ > $lockfile > > $echo "`$date` started mirroring" >> $logfile > > $rsync -aqH --exclude .~tmp~/ --exclude .~tmp~ --delete > > us-msync.centos.org::CentOS /data/mirror/centos > > $echo "`$date` finished mirroring" >> $logfile > > $rm $lockfile > > > > fi > > # > > > >> On Tue, Apr 20, 2021 at 3:14 PM Valeri Galtsev > >> > >> wrote: > >> > >>> > >>> > >>>> On Apr 20, 2021, at 12:34 AM, Rudi Ahlers > wrote: > >>>> > >>>> Pulp is a bit overkill for my liking. > >>>> > >>> > >>> Coming back to the original question: mirror hosting variety of > >>> distributions, does not have to have any packaging or other tools > >>> used by > >>> those distributions. Public mirror box I support runs FreeBSD, and > hosts > >>> mirrors of CentOS, Ubuntu, CPAN, EPEL, … > >>> > >>> I hope, this helps. > >>> > >>> Valeri > &
Re: [CentOS] CentOS are Debian / Ubuntu mirror
ok, so do you simply rsync the repositories from the other distributions you need? On Tue, Apr 20, 2021 at 3:14 PM Valeri Galtsev wrote: > > > > On Apr 20, 2021, at 12:34 AM, Rudi Ahlers wrote: > > > > Pulp is a bit overkill for my liking. > > > > Coming back to the original question: mirror hosting variety of > distributions, does not have to have any packaging or other tools used by > those distributions. Public mirror box I support runs FreeBSD, and hosts > mirrors of CentOS, Ubuntu, CPAN, EPEL, … > > I hope, this helps. > > Valeri > > > > > On Mon, Apr 19, 2021 at 2:44 PM Arnaud Gelly > wrote: > > > >> Hello, > >> > >> Is Pulp not supposed to do what you want : RPM, DEB and more in the same > >> software ? > >> > >> I'm not using Pulp, just reading their website. > >> > >> Regards, > >> -- > >> > >> > >> > >> On Mon, 19 Apr 2021 at 14:26, Rudi Ahlers wrote: > >> > >>> Thank you. This at least point me in the right direction. I don't quite > >>> want to setup 2 servers, or 2 VM's for this. > >>> > >>> > >>> On Mon, Apr 19, 2021 at 2:03 PM Robert Heller > >> wrote: > >>> > >>>> At Mon, 19 Apr 2021 08:55:54 +0200 CentOS mailing list < > >>> centos@centos.org> > >>>> wrote: > >>>> > >>>>> > >>>>> Hi, > >>>>> > >>>>> Does anyone have some instructions on setting up a CentOS server as > >>>> mirror > >>>>> for Debian and Ubuntu distributions? I already setup a YUM mirror and > >>>> this > >>>>> works fairly well, but cannot seem to figure out how to mirror Debian > >>> and > >>>>> Ubuntu repositories. > >>>> > >>>> You need to grab a copy of debmirror, which is just a Perl script, so > >> it > >>>> should work under CentOS. I don't know where to get a version as a > >>> tarball > >>>> -- > >>>> I had an available VM running Ubuntu and just installed it there and > >> NFS > >>>> mounted the mirror disk from the CentOS server. There is a config file > >>> for > >>>> debmirror to control where you mirror from and just what you mirror > >>>> (versions, > >>>> arches, etc.). There is a man page and and example config file. You > >> then > >>>> run > >>>> debmirror from crontab (eg every day). > >>>> > >>>> Unfortunately, the Debian flavor repositories are not structured to > >> just > >>>> be > >>>> rsync'ed like the CentOS repositories. > >>>> > >>>>> > >>>>> > >>>>> > >>>> > >>>> -- > >>>> Robert Heller -- Cell: 413-658-7953 GV: 978-633-5364 > >>>> Deepwoods Software-- Custom Software Services > >>>> http://www.deepsoft.com/ -- Linux Administration Services > >>>> hel...@deepsoft.com -- Webhosting Services > >>>> > >>>> _______ > >>>> CentOS mailing list > >>>> CentOS@centos.org > >>>> https://lists.centos.org/mailman/listinfo/centos > >>>> > >>> > >>> > >>> -- > >>> Kind Regards > >>> Rudi Ahlers > >>> Website: http://www.rudiahlers.co.za > >>> ___ > >>> CentOS mailing list > >>> CentOS@centos.org > >>> https://lists.centos.org/mailman/listinfo/centos > >>> > >> ___ > >> CentOS mailing list > >> CentOS@centos.org > >> https://lists.centos.org/mailman/listinfo/centos > >> > > > > > > -- > > Kind Regards > > Rudi Ahlers > > Website: http://www.rudiahlers.co.za > > ___ > > CentOS mailing list > > CentOS@centos.org > > https://lists.centos.org/mailman/listinfo/centos > > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos > -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS are Debian / Ubuntu mirror
Pulp is a bit overkill for my liking. On Mon, Apr 19, 2021 at 2:44 PM Arnaud Gelly wrote: > Hello, > > Is Pulp not supposed to do what you want : RPM, DEB and more in the same > software ? > > I'm not using Pulp, just reading their website. > > Regards, > -- > > > > On Mon, 19 Apr 2021 at 14:26, Rudi Ahlers wrote: > > > Thank you. This at least point me in the right direction. I don't quite > > want to setup 2 servers, or 2 VM's for this. > > > > > > On Mon, Apr 19, 2021 at 2:03 PM Robert Heller > wrote: > > > > > At Mon, 19 Apr 2021 08:55:54 +0200 CentOS mailing list < > > centos@centos.org> > > > wrote: > > > > > > > > > > > Hi, > > > > > > > > Does anyone have some instructions on setting up a CentOS server as > > > mirror > > > > for Debian and Ubuntu distributions? I already setup a YUM mirror and > > > this > > > > works fairly well, but cannot seem to figure out how to mirror Debian > > and > > > > Ubuntu repositories. > > > > > > You need to grab a copy of debmirror, which is just a Perl script, so > it > > > should work under CentOS. I don't know where to get a version as a > > tarball > > > -- > > > I had an available VM running Ubuntu and just installed it there and > NFS > > > mounted the mirror disk from the CentOS server. There is a config file > > for > > > debmirror to control where you mirror from and just what you mirror > > > (versions, > > > arches, etc.). There is a man page and and example config file. You > then > > > run > > > debmirror from crontab (eg every day). > > > > > > Unfortunately, the Debian flavor repositories are not structured to > just > > > be > > > rsync'ed like the CentOS repositories. > > > > > > > > > > > > > > > > > > > > > -- > > > Robert Heller -- Cell: 413-658-7953 GV: 978-633-5364 > > > Deepwoods Software-- Custom Software Services > > > http://www.deepsoft.com/ -- Linux Administration Services > > > hel...@deepsoft.com -- Webhosting Services > > > > > > ___ > > > CentOS mailing list > > > CentOS@centos.org > > > https://lists.centos.org/mailman/listinfo/centos > > > > > > > > > -- > > Kind Regards > > Rudi Ahlers > > Website: http://www.rudiahlers.co.za > > ___ > > CentOS mailing list > > CentOS@centos.org > > https://lists.centos.org/mailman/listinfo/centos > > > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos > -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS are Debian / Ubuntu mirror
Thank you. This at least point me in the right direction. I don't quite want to setup 2 servers, or 2 VM's for this. On Mon, Apr 19, 2021 at 2:03 PM Robert Heller wrote: > At Mon, 19 Apr 2021 08:55:54 +0200 CentOS mailing list > wrote: > > > > > Hi, > > > > Does anyone have some instructions on setting up a CentOS server as > mirror > > for Debian and Ubuntu distributions? I already setup a YUM mirror and > this > > works fairly well, but cannot seem to figure out how to mirror Debian and > > Ubuntu repositories. > > You need to grab a copy of debmirror, which is just a Perl script, so it > should work under CentOS. I don't know where to get a version as a tarball > -- > I had an available VM running Ubuntu and just installed it there and NFS > mounted the mirror disk from the CentOS server. There is a config file for > debmirror to control where you mirror from and just what you mirror > (versions, > arches, etc.). There is a man page and and example config file. You then > run > debmirror from crontab (eg every day). > > Unfortunately, the Debian flavor repositories are not structured to just > be > rsync'ed like the CentOS repositories. > > > > > > > > > -- > Robert Heller -- Cell: 413-658-7953 GV: 978-633-5364 > Deepwoods Software-- Custom Software Services > http://www.deepsoft.com/ -- Linux Administration Services > hel...@deepsoft.com -- Webhosting Services > > _______ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos > -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS are Debian / Ubuntu mirror
Hi, Does anyone have some instructions on setting up a CentOS server as mirror for Debian and Ubuntu distributions? I already setup a YUM mirror and this works fairly well, but cannot seem to figure out how to mirror Debian and Ubuntu repositories. -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] Port forward internal host not working
Hi, I am trying to reach a Raspberry Pi on my physical LAN (192.168.10.132), via OpenVPN, from the internet. The Internet host is 154.77.x.x. This is also the OpenVPN router, 10.8.0.1. The Pi is on 10.8.0.203. I am trying to reach port 3000 from the internet. >From the CentOS 7 server, I can access the Pi over OpenVPN: root@ns1:[~]$ telnet 10.8.0.203 3000 Trying 10.8.0.203... Connected to 10.8.0.203. Escape character is '^]'. But from the host IP, I cannot get it to connect: root@ns1:[~]$ telnet 154.77.x.x 3000 Trying 154.77.x.x .. telnet: connect to address 154.77.x.x: Connection timed out I have tried a few different iptables rules, but simply cannot get it working. As example: iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables -A INPUT -i tun+ -j ACCEPT iptables -A FORWARD -i tun+ -j ACCEPT iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 8081 -j DNAT --to 10.8.0.202:8081 iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 3000 -j DNAT --to 10.8.0.203:3000 iptables -A FORWARD -i eth0 -p tcp --dport 8081 -d 10.8.0.202 -j ACCEPT iptables -A FORWARD -i eth0 -p tcp --dport 3000 -d 10.8.0.203 -j ACCEPT iptables -A FORWARD -i tun+ -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -i eth0 -o tun+ -m state --state RELATED,ESTABLISHED -j ACCEPT -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Accounting package recommendations
I have an accountant, but still need todo my part from the business' end. They don't invoice my clients. Quickbooks works very well, but keeps me stuck in Windows land. It's just as well saying I cannot drive a car cause I don't want to learn how to overhaul the engine, or I cannot be a system admin cause I don't want to learn how the electronics on the PC boards work. On Mon, Jun 22, 2020 at 3:24 PM Giles Coochey wrote: > > > On 22/06/2020 13:57, Rudi Ahlers wrote: > > I have to say, GnuCash simply doesn't do it for me. As a tech, I don't > > have time to figure out accounting systems, and I really don't want to > > have this info on the internet in 3rd party's control. > > > > > >>> On Tue, Jun 9, 2020 at 7:22 PM Rudi Ahlers wrote: > >>> > >>>> Hi, > >>>> > >>>> I am looking for an offline accounting package recommendation, please. > >>>> I enjoyed using Xero accounting, but need something that's offline, > >>>> and where the data remains my property. Having used Quickbooks on > >>>> Windows in the past, I am looking for something similar. > >>>> > >>>> Any recommendations? > >>>> > >>>> -- > >>>> Kind Regards > >>>> Rudi Ahlers > >>>> Website: http://www.rudiahlers.co.za > >>>> > >>>> > Don't take this the wrong way, but if you're looking for an accounting > solution, but at the same time you don't want to learn how to use a > perfectly adequate accounting solution, then perhaps all you need is an > accountant, and not a piece of software. > > > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Accounting package recommendations
I have to say, GnuCash simply doesn't do it for me. As a tech, I don't have time to figure out accounting systems, and I really don't want to have this info on the internet in 3rd party's control. On Wed, Jun 10, 2020 at 1:09 PM wrote: > > On Wed, 10 Jun 2020, Gianluca Cecchi wrote: > > > On Tue, Jun 9, 2020 at 7:22 PM Rudi Ahlers wrote: > > > >> Hi, > >> > >> I am looking for an offline accounting package recommendation, please. > >> I enjoyed using Xero accounting, but need something that's offline, > >> and where the data remains my property. Having used Quickbooks on > >> Windows in the past, I am looking for something similar. > >> > >> Any recommendations? > >> > >> -- > >> Kind Regards > >> Rudi Ahlers > >> Website: http://www.rudiahlers.co.za > >> > >> > > In the past (more than 10 years ago...) I had to work with Sql Ledger and > > in its forum/mailing list often Quickbooks was cited. > > I enjoyed it because of being GPL, using perl and PostgreSQL as a > > background database. > > It seems a still developed piece of software. Here the home page: > > https://www.sql-ledger.com/ > > There also was ledgersmb which is/was a fork of sql-ledger. Both got the job > done at the time but ledger smb had some enhancements that at the time Dieter > refused to add. > > Keep in mind, I have not looked at either one in about 4 years and have > no idea what the current status is. My business needs changed so I moved on. > > Regards, > > -- > Tom m...@tdiehl.org > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] Accounting package recommendations
Hi, I am looking for an offline accounting package recommendation, please. I enjoyed using Xero accounting, but need something that's offline, and where the data remains my property. Having used Quickbooks on Windows in the past, I am looking for something similar. Any recommendations? -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] docker-firewalld
As matter of interest, why would you want to run firewalld inside docker? ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] Rudi Ahlers invites you to Freelancer.com
15 February 2013 Hi, Rudi Ahlers is inviting you to join Freelancer.com (http://www.freelancer.com/users/7032909.html?utm_campaign=new_freelancer_inviteutm_medium=emailutm_source=freelancerutm_content=new_freelancer_invite) Rudi Ahlers (http://www.freelancer.com/users/7032909.html?utm_campaign=new_freelancer_inviteutm_medium=emailutm_source=freelancerutm_content=new_freelancer_invite) 15 February 2013 Freelancer.com is the world's largest micro-outsourcing site. We have over 7,033,080 registered professionals ready to bid on your jobs and produce high quality work. The average job is under $200 USD and you can outsource anything, whether you need web design, graphic design, marketing or sales. Turbocharge your business today! Looking for work? We also have the largest network of employers ready to hire just about any skill set. Join Freelancer.com (http://www.freelancer.com/friend-invitation/join.php?id=10159224utm_campaign=new_freelancer_inviteutm_medium=emailutm_source=freelancerutm_content=new_freelancer_invite) centos@centos.org was invited to join Freelancer.com by Rudi Ahlers. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 2way authentication for SSH?
On Mon, Jan 28, 2013 at 10:07 AM, Alexander Dalloz ad+li...@uni-x.orgwrote: Am 28.01.2013 08:51, schrieb Rudi Ahlers: Hi, Does anyone know of a stable / working 2way authentication system for SSH, and even web authentication services? Most of the banks in South Africa have a system that, when you want to make a payment, they send you an SMS and you need to verify the action with a secret code which was SMS'd to you. gmail also has this. Does anyone know of a universal plugin / application that can be used with SSH and even websites like Wordpress / Joolma / Webmin / etc? Any pointer would be appreciated. You may check LinOTP http://www.linotp.org/index.php/about Don't know your business case, but maybe even the commercially supported variant may be of interest for you. Regards Alexander Thank you Alexander. Do you know of any such product which doesn't need LDAP? I've never worked with LDAP and don't really want to spend time to learn it now. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Cell: 082 554 7532 Fax: 086 268 8492 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 2way authentication for SSH?
On Mon, Jan 28, 2013 at 3:35 PM, Robert Moskowitz r...@htt-consult.comwrote: On 01/28/2013 02:51 AM, Rudi Ahlers wrote: Hi, Does anyone know of a stable / working 2way authentication system for SSH, and even web authentication services? Most of the banks in South Africa have a system that, when you want to make a payment, they send you an SMS and you need to verify the action with a secret code which was SMS'd to you. gmail also has this. Does anyone know of a universal plugin / application that can be used with SSH and even websites like Wordpress / Joolma / Webmin / etc? Any pointer would be appreciated. As you can see by the responses, there is no 'universal' plugin. The whole arena of authentication is plagued with bootstrapping challenges, security flaws, and complexity (like JSON). I am the author of one of the alternatives (HIP), and my recommendation is just choose your poison. ___ Thanx Robert. I guess I should have seen this coming But I have quite a few new leads for applications that can offer this, even if I would need to implement more than 1 solution. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Cell: 082 554 7532 Fax: 086 268 8492 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] 2way authentication for SSH?
Hi, Does anyone know of a stable / working 2way authentication system for SSH, and even web authentication services? Most of the banks in South Africa have a system that, when you want to make a payment, they send you an SMS and you need to verify the action with a secret code which was SMS'd to you. gmail also has this. Does anyone know of a universal plugin / application that can be used with SSH and even websites like Wordpress / Joolma / Webmin / etc? Any pointer would be appreciated. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Cell: 082 554 7532 Fax: 086 268 8492 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to setup RAID 5 + 1 hot spare?
On Thu, Jan 24, 2013 at 7:59 AM, Ren Wen shan renws1...@gmail.com wrote: Hello everyone, I am new to this group so please forgive me if this question has been already asked. With four identical hard drives, I want to setup RAID 5 + 1 hot spare by a fresh CentOS (6.3) installation. I have read this article ( http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-raid-config.html ) and watched this video (http://www.youtube.com/watch?v=qm3MkuTfDLw), now I have the basic ideas. However, due to my limited experience and knowledge on this area, I am still confused. To make things easier, I only need a swap and a `/' partition. Could you give me any hint on this? What should I read to get the basic knowledge? How can I setup a simple RAID 5 + hot spare? Regards, - Meatball ___ Since you're new to this list, and this topic, I'm going to spare you the headache. Don't use RAID5 Even with a hot-spare, if you use large drives chances are you'll loose everything if one of the drive fail and you need to rebuild the whole set. Rather use RAID 10. The newer CentOS installation disks has an option to setup RAID10, alternatively. There are numerous tutorials out there on how todo it, but this one seems quite easy to follow: http://www.youtube.com/watch?v=zlOK1voR2nA -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Cell: 082 554 7532 Fax: 086 268 8492 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Red Hat Storage on CentOS?
Hi, Does anyone know if Red Hat Store will be available in CentOS? Have a look here: http://www.redhat.com/products/storage-server/ I'm not referring to the Red Hat Cluster Suite which is already available. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Cell: 082 554 7532 Fax: 086 268 8492 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] yum vs. freenx
On Wed, Dec 19, 2012 at 11:08 PM, Les Mikesell lesmikes...@gmail.com wrote: Is there any way (besides being awake when you do it...) to keep freenx updates from killing yum mid-transaction if you run the update in a freenx session? Normally I ssh in from a session on a different host but sometimes forget... -- Les Mikeselll lesmikes...@gmail.com ___ maybe run is through screen? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Cell: 082 554 7532 Fax: 086 268 8492 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] /tmp directory
Am 10.12.2012 um 11:22 schrieb John Doe:
From: Jerry Geis ge...@pagestation.com
You also have '/var/tmp' that is expected to survive reboots and should be
less often (never?) cleared.
cat /etc/cron.daily/tmpwatch
flags=-umc
/usr/sbin/tmpwatch $flags -x /tmp/.X11-unix -x /tmp/.XIM-unix \
-x /tmp/.font-unix -x /tmp/.ICE-unix -x /tmp/.Test-unix \
-X '/tmp/hsperfdata_*' 240 /tmp
/usr/sbin/tmpwatch $flags 720 /var/tmp
for d in /var/{cache/man,catman}/{cat?,X11R6/cat?,local/cat?}; do
if [ -d $d ]; then
/usr/sbin/tmpwatch $flags -f 720 $d
fi
done
720 = 30 days
what? you mean this dir called /var/tmp is actually for temporary
stuff?? man, this system is seriously screwed up...
What else do you use it for?
--
Kind Regards
Rudi Ahlers
SoftDux
Website: http://www.SoftDux.com
Technical Blog: http://Blog.SoftDux.com
Cell: 082 554 7532
Fax: 086 268 8492
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] /tmp directory
On Mon, Dec 10, 2012 at 6:58 PM, m.r...@5-cent.us wrote:
Rudi Ahlers wrote:
Am 10.12.2012 um 11:22 schrieb John Doe:
From: Jerry Geis ge...@pagestation.com
You also have '/var/tmp' that is expected to survive reboots and
should be less often (never?) cleared.
cat /etc/cron.daily/tmpwatch
flags=-umc
/usr/sbin/tmpwatch $flags -x /tmp/.X11-unix -x /tmp/.XIM-unix \
-x /tmp/.font-unix -x /tmp/.ICE-unix -x /tmp/.Test-unix \
-X '/tmp/hsperfdata_*' 240 /tmp
/usr/sbin/tmpwatch $flags 720 /var/tmp
for d in /var/{cache/man,catman}/{cat?,X11R6/cat?,local/cat?}; do
if [ -d $d ]; then
/usr/sbin/tmpwatch $flags -f 720 $d
fi
done
720 = 30 days
what? you mean this dir called /var/tmp is actually for temporary
stuff?? man, this system is seriously screwed up...
What else do you use it for?
I think John intended the cmt with humor/humor
mark temporary files are temporary? who'd'a thunk it?
___
Probably. But I've seen people using /tmp to store rather important
stuff, which is why I asked the question - to get clarity.
--
Kind Regards
Rudi Ahlers
SoftDux
Website: http://www.SoftDux.com
Technical Blog: http://Blog.SoftDux.com
Cell: 082 554 7532
Fax: 086 268 8492
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Please I'd like to install 2 websites on my un managed VPS on CentOS6
On Thu, Feb 23, 2012 at 12:25 PM, Wuxi Ixuw w7u64...@gmail.com wrote: Am I asking stupid questions to get no answers? On 23/02/2012 09:42 AM, Wuxi Ixuw wrote: Hello I've got an un managed VPS running CentOS6 I'd like to install 2 websites and secure the whole VPS I've tried tutorials from the how to forge website but things keep screwing all the time. Please if any one can help or give a good working tutorials that would be awesome. Thanks a lot WI, ___ It would help if you're a LOT more specific asto what you've tried and what doesn't work. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 Fax: 086 268 8492 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Dedicated Firewall/Router
On Tue, Jan 17, 2012 at 9:55 AM, Laurent Wandrebeck l.wandreb...@gmail.com wrote: On Mon, 16 Jan 2012 18:18:26 -0600 Tom Bishop bisho...@gmail.com wrote: I would get a dell r210 from the outlet site and then load pfsense, been running in multiple locations, solid and works great. Do NOT use pfsense if you have to use realtek cards. I used to (1.2.3 and 2.0.1), and lost connection regularly, need to reboot to get it back… Flee realtek as much as you can :) You shouldn't be using realtek NIC's in a production, or even just a large-ish server environment in anycase. Rather use Intel. Back to the topic though, how does one guarantee 100% uptime on the firewall level when you use a standard dedicated server? Even if the server (Dell / Intell / SuperMicro / you name it...) has redundant PSU's and HDD's, there could still be hardware failure. And, unless you buy 3 or 4 at a time, you may run into a where once you pop the HDD into a new (standby?) chassis that something may not be compatible and the firewall might be down for a few minutes, or even hours while you search for a solution on the internet, or with the hardware vendor. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] an actual hacked machine, in a preserved state
On Tue, Jan 3, 2012 at 11:08 AM, Leonard den Ottolander leon...@den.ottolander.nl wrote: Hello Craig, On Mon, 2012-01-02 at 01:04 -0700, Craig White wrote: Very often, a single user with a weak password has his account cracked and then a hacker can get a copy of /etc/shadow and brute force the root password. This is incorrect. The whole reasoning behind /etc/shadow is to hide the actual hashes from normal system users. /etc/shadow is chown root.root and chmod 0400. Without root access /etc/shadow is not accessible. Regards, Leonard. -- mount -t life -o ro /dev/dna /genetic/research So, explain this then: How does something like c99shell allow a local user (not root) to read the /etc/shadow file? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.7 gives me a blank screen after bootup
2011/11/8 Ljubomir Ljubojevic off...@plnet.rs: Vreme: 11/08/2011 06:12 PM, Rudi Ahlers piše: This is a SuperMicro X7SBI motherboard, which has a On board ATI ES1000 32MB Graphics graphics card. I am not sure if this happens all the time or just from time to time. If it is later, then try installing ATI drivers from ElRepo (http://elrepo.org/tiki/kmod-fglrx). -- Thanx. I only got around to reboot this server now and try the drivers but that didn't work either. But not to worry, I'll try CentOS 6, or otherwise Debian and see if it works. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to find source of data loss / corruption
Cool, thanx :) On Fri, Dec 16, 2011 at 2:16 AM, Ljubomir Ljubojevic off...@plnet.rs wrote: Vreme: 12/16/2011 12:22 AM, Rudi Ahlers piše: John, Where do I get inotifywait ? yum what provides */inotifywait didn't return anything root@mars:[/]$ yum whatprovides */inotifywait Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.highspeedweb.net * extras: centos.omnispring.com * updates: mirrors.igsobe.com Excluding Packages in global exclude list Finished extras/filelists_db | 206 kB 00:00 updates/filelists_db | 1.7 MB 00:00 No Matches found inotify-tools from EPEL? -- Ljubomir Ljubojevic (Love is in the Air) PL Computers Serbia, Europe Google is the Mother, Google is the Father, and traceroute is your trusty Spiderman... StarOS, Mikrotik and CentOS/RHEL/Linux consultant ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how to find source of data loss / corruption
Hi, 2 websites, hosted on 2 different CentOS 5.7 servers (one being very new, about 3 weeks old) keeps loosing data - but it's more like it's corrupted than being deleted. For example, a photo would be uploaded last night and today when we checked it, it doesn't show on the website. So we check if the file is on the server, and exists but is 0KB in size. Last night it still worked fine. The photo is 482Kb in size. The first time this happened we thought it was due to a bug with CentOS 5.7 + EXT4 + quotas (there's a bug open for this) and since the server's console kept giving errors about possible data corruption we thought it would be best if we move everything to a more stable platform. So we brought a new server, setup CentOS 5.7 + ext3 + quotas (which has been working fine on all our servers for a long time) and moved the data across. A few days down the line and I still see this happening. I'm out of ideas and hope someone could shed some light on the matter. I've checked some suggested search results, but couldn't find any issues with the HDD according to SMART. The servers' both have 4GB RAM and 8Core CPU's.Neither RAM, nor CPU usage is high. Both are setup with RAID10 across 4 entrerprise HDD's, one server has software RAID and the new one hardware RAID. So even when we changed the RAID subsystem it still happens. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to find source of data loss / corruption
On Thu, Dec 15, 2011 at 1:48 PM, anax a...@ayni.com wrote: Hi Rudi we once had a similar problem on a Web: This Web had this in particular that its home-page needed to be deleted daily and of course reinstalled immediately. Then, in a new version of the Web it did not need this delete/reinstall cycle any more, so the webadmin just removed the link to the delete script. He did not remove the delete-script itself from the Web. The effect was, that the home-page was still deleted at random times. What we then found out: We used an internal Search-Engine which crawled this web. And this Search-Engine had not forgotten the link to the delete-script, but invoked it at random times, whenever it crawled the particular Web. Your case: could it be something similar? suomi Thanx for the advice. We found a script which seems to have been modified somehow, probably hacker or a rootkit - don't yet know, but we're looking to see if we can trace it down. I don't want to reveal the code here due to it's uniqueness and I don't want to attrack further attension to the sites by the attack(er). -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to find source of data loss / corruption
On Thu, Dec 15, 2011 at 1:29 PM, John Doe jd...@yahoo.com wrote: From: Rudi Ahlers r...@softdux.com For example, a photo would be uploaded last night and today when we checked it, it doesn't show on the website. So we check if the file is on the server, and exists but is 0KB in size. Last night it still worked fine. The photo is 482Kb in size. Only the size changed to 0 or were some other stats changed too? Maybe try something like: inotifywait -m --format %T %e %f --timefmt %D %T -r /path/to/dir At least you would know at what time something happens... JD ___ John, Where do I get inotifywait ? yum what provides */inotifywait didn't return anything root@mars:[/]$ yum whatprovides */inotifywait Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.highspeedweb.net * extras: centos.omnispring.com * updates: mirrors.igsobe.com Excluding Packages in global exclude list Finished extras/filelists_db | 206 kB 00:00 updates/filelists_db | 1.7 MB 00:00 No Matches found -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] iSCSI best practices
On Mon, Dec 12, 2011 at 3:52 PM, Reindl Harald h.rei...@thelounge.net wrote: Am 12.12.2011 14:49, schrieb lheck...@users.sourceforge.net: Outage is one thing, but having the disk volumes disappear mid-transaction can be detrimental to a file system's health. To get this back on-topic and closer to the OP's requests, are there any particular iscsi settings one should consider to increase resiliency and minimise the impact of e.g. a rebooting switch? timeout settings? The big disadvantage of iscsi is that you add another layer that can fail (compared to having virtual machine images on a local disk). you should always have two links to your iSCSI device and two different switches so that it does not matter if one switch dies or reboots And then you still have the iSCSI applicance / server to worry about. It can fail as well. Even with redundancy PSU's it could fail - the RAM, CPU, motherboard, controller card, expensive RAID card, etc can fail as well. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS fileserver migrating to ZFS appliance
On Fri, Nov 25, 2011 at 4:00 PM, Alan McKay alan.mc...@gmail.com wrote: Hey folks, I've got a CentOS / RHEL (5.x) environment and am in the process of migrating the 5.3 file server over to an Oracle/Sun 7120 appliance. I want to keep my main 5.3 server as our NIS server but am moving NFS and Samba functions over to the appliance. NFS was a no brainer as one can imagine. Samba seems a bit trickier because of the authentication requirements in the ZFS server. They seem to want a domain controller which we don't have. Has anyone been here recently and can help with how to config the appliance for Samba but to authenticate from NIS ? thanks, -Alan -- I don't know that particular NAS, but does it allow you to setup an anonymous SMB user? If not, then setup a normal SMB share on the NAS and mount it on the CentOS server, then rsync the data across -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.7 gives me a blank screen after bootup
On Wed, Nov 2, 2011 at 10:46 PM, m.r...@5-cent.us wrote: Ljubomir Ljubojevic wrote: Vreme: 11/02/2011 09:32 PM, Rudi Ahlers piše: On Wed, Nov 2, 2011 at 8:29 PM, Scott Robbinsscot...@nyc.rr.com wrote: On Wed, Nov 02, 2011 at 08:14:17PM +0200, Rudi Ahlers wrote: Hi all, I have an odd problem, for which I couldn't find any suggestions on google. A CentOS 5.7x64 gives me a blank screen on bootup, both to the 17 LCD monitor connected to the VGA port, and to the KVMOVIP device built-into the server, This sometimes seems to happen when it goes into framebuffer. But I believe his nofb tells it not to use framebuffer. Yes, that's what I thought but it doesn't seen to work? Thank you Scott, but that didn't seem to help much, unfortunately. snip Is there anything in either messages or Xorg.0.log? Or even secure? I honestly don't know what to look for, exactly ... But maybe this will help: (**) RADEON(0): RADEONScreenInit d800 0 (**) RADEON(0): Map: 0xd800, 0x0200 (WW) RADEON(0): Failed to set up write-combining range (0xd800,0x200) (**) RADEON(0): RADEONSave (**) RADEON(0): RADEONSaveMode(0xa3f3f50) (**) RADEON(0): Read: 0x000c 0x000500b3 0x (**) RADEON(0): Read: rd=12, fd=179, pd=5 (**) RADEON(0): RADEONSaveMode returns 0xa3f3f50 (**) RADEON(0): RADEONInitMemoryMap() : (**) RADEON(0): mem_size : 0x0400 (**) RADEON(0): MC_FB_LOCATION : 0xdbffd800 (**) RADEON(0): MC_AGP_LOCATION : 0xffc0 (**) RADEON(0): RADEONModeInit() 800x60040.00 800 840 968 1056 600 601 605 628 (24,32) +H +V 800x60040.00 800 840 968 1056 600 601 605 628 (24,32) +H +V (**) RADEON(0): Pitch = 6815848 bytes (virtualX = 800, displayWidth = 832) (**) RADEON(0): dc=4000, of=32000, fd=142, pd=8 (**) RADEON(0): RADEONInit returns 0xa3f4900 (**) RADEON(0): RADEONRestoreMode() (**) RADEON(0): RADEONRestoreMemMapRegisters() : (**) RADEON(0): MC_FB_LOCATION : 0xdbffd800 (**) RADEON(0): MC_AGP_LOCATION : 0xffc0 (**) RADEON(0): Map Changed ! Applying ... (**) RADEON(0): Map applied, resetting engine ... (**) RADEON(0): Updating display base addresses... (**) RADEON(0): Memory map updated. (**) RADEON(0): Programming CRTC1, offset: 0x (**) RADEON(0): Wrote: 0x000c 0x0003008e 0x (0xa500) (**) RADEON(0): Wrote: rd=12, fd=142, pd=3 (**) RADEON(0): GRPH_BUFFER_CNTL from 20005c5c to 20055c5c (**) RADEON(0): RADEONSaveScreen(0) (II) RADEON(0): Depth moves disabled by default (**) RADEON(0): Setting up initial surfaces (**) RADEON(0): Initializing fb layer (**) RADEON(0): Setting up accel memmap (II) RADEON(0): Memory manager initialized to (0,0) (832,8191) (II) RADEON(0): Reserved area from (0,600) to (832,610) (II) RADEON(0): Largest offscreen area available: 832 x 7581 (**) RADEON(0): Initializing backing store (==) RADEON(0): Backing store disabled (WW) RADEON(0): Direct rendering disabled (**) RADEON(0): Setting up final surfaces (**) RADEON(0): Initializing Acceleration (II) RADEON(0): Render acceleration disabled (**) RADEON(0): EngineInit (32/32) (**) RADEON(0): Pitch for acceleration = 104 (**) RADEON(0): EngineRestore (32/32) (II) RADEON(0): Using XFree86 Acceleration Architecture (XAA) Screen to screen bit blits Solid filled rectangles 8x8 mono pattern filled rectangles Indirect CPU to Screen color expansion Solid Lines Dashed Lines Scanline Image Writes Offscreen Pixmaps Setting up tile and stipple cache: 32 128x128 slots 28 256x256 slots 13 512x512 slots (II) RADEON(0): Acceleration enabled (**) RADEON(0): Initializing DPMS (**) RADEON(0): Initializing Cursor (==) RADEON(0): Silken mouse enabled (II) RADEON(0): Using hardware cursor (scanline 610) (II) RADEON(0): Largest offscreen area available: 832 x 7576 (**) RADEON(0): Initializing color map (**) RADEON(0): Initializing DGA (**) RADEON(0): Initializing Xv (II) RADEON(0): No video input capabilities detected and no information is provided - disabling multimedia i2c (II) Loading sub module theatre_detect (II) LoadModule: theatre_detect (II) Loading /usr/lib64/xorg/modules/multimedia/theatre_detect_drv.so (II) Module theatre_detect: vendor=X.Org Foundation compiled for 7.1.1, module version = 1.0.0 ABI class: X.Org Video Driver, version 1.0 (II) RADEON(0): no multimedia table present, disabling Rage Theatre. (**) RADEON(0): RADEONScreenInit finished (==) RandR enabled (II) Initializing built-in extension MIT-SHM (II) Initializing built-in extension XInputExtension (II) Initializing built-in extension XTEST (II) Initializing built-in extension XKEYBOARD (II) Initializing built-in extension XC-APPGROUP (II) Initializing built-in extension SECURITY (II) Initializing built-in extension XINERAMA (II) Initializing built-in extension XFIXES (II) Initializing built-in extension XFree86-Bigfont (II) Initializing
[CentOS] CentOS 5.7 gives me a blank screen after bootup
Hi all, I have an odd problem, for which I couldn't find any suggestions on google. A CentOS 5.7x64 gives me a blank screen on bootup, both to the 17 LCD monitor connected to the VGA port, and to the KVMOVIP device built-into the server, I can see the GRUB boot loader, and everything booting up, upto the point where it says Waiting for driver initialization., then it goes blank - both on the LCD and the KVM. Does anyone know how to fix this? It does the same whether I boot into the CentOS, or XEN kernel, or in single user mode. First few lines of /etc/grub.conf: # initrd /initrd-version.img #boot=/dev/md0 default 0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.18-274.7.1.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-274.7.1.el5 dom0_mem=786M module /vmlinuz-2.6.18-274.7.1.el5xen ro root=/dev/LVM01/root nofb module /initrd-2.6.18-274.7.1.el5xen.img title CentOS (2.6.18-274.7.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-274.7.1.el5 ro root=/dev/LVM01/root nofb initrd /initrd-2.6.18-274.7.1.el5.img root@zaxen02:[~]$ uname -a Linux zaxen02 2.6.18-274.7.1.el5xen #1 SMP Thu Oct 20 17:06:34 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux root@zaxen02:[~]$ cat /etc/redhat-release CentOS release 5.7 (Final) -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.7 gives me a blank screen after bootup
On Wed, Nov 2, 2011 at 8:29 PM, Scott Robbins scot...@nyc.rr.com wrote: On Wed, Nov 02, 2011 at 08:14:17PM +0200, Rudi Ahlers wrote: Hi all, I have an odd problem, for which I couldn't find any suggestions on google. A CentOS 5.7x64 gives me a blank screen on bootup, both to the 17 LCD monitor connected to the VGA port, and to the KVMOVIP device built-into the server, This sometimes seems to happen when it goes into framebuffer. Sometimes, it's an NVidia card trying to use nouveau, sometimes, the fb module is missing, but it's never something I've investigated that thoroughly. I see from your menu that you're running a xen kernel. I'm afraid I'm not at all familiar with them. However, you might try (no guarantee) using nomodeset in the places where you have nofb. Thank you Scott, but that didn't seem to help much, unfortunately. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ssh reverse DNS failure
On Sun, Sep 25, 2011 at 2:13 PM, Timothy Murphy gayle...@eircom.net wrote: I use dyndns's (free) service to access a remote machine with a dynamic IP address. The machine is running under CentOS-6.0. I can ssh into the address given me by dyndns (*.homelinux.com), but when I do this I get the warning reverse mapping checking getaddrinfo for * failed - POSSIBLE BREAK-IN ATTEMPT! This doesn't really matter, as I normally use OpenVPN for accessing this site - the dyndns method is a safety precaution in case openvpn doesn't work. But I'm wondering if it is possible to stop the warning? I've tried various recipes google gave me, eg adding UseDNS no to /etc/ssh/sshd_config on the remote machine (and re-starting sshd), but none of them has worked, -- Add the DynDNS hostnane to the localmachine, i.e: 192.168.0.10 mybox.homelinux.net and see if that helps? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to update CentOS 5.4 to 5.6?
On Thu, Sep 22, 2011 at 12:37 PM, John R Pierce pie...@hogranch.com wrote: On 09/22/11 3:08 AM, Sebastian Schubert wrote: Am 22.09.11 11:59, schrieb John R Pierce: On 09/22/11 2:13 AM, John Doe wrote: If you want to take the risk anyway, the following (untested) might work: Modify your /etc/yum.repos.d/CentOS-Base.repo try to replace the baseurl's $releasever with 5.6... no, as the 5.6 specific files are removed when 5.7 is released. you'd have to get a clone of the vault's 5.6 directory and set that up as a local repository instead, then point the repo file to that. crap ... the 5.6 files are still there .. just change the baseurl like john doe wrote and you'll get an update to 5.6 no, they aren't. http://mirror.centos.org/centos/5.6/ empty. except a readme file telling you to look in /5/ instead, which has the 5.7 stuff in it. Why would the 5.6 stuff have been removed? Apart from the 5.7 is more secure answer, or even we're running out of disk space, what is the actual reason behind this? surely a few versions of the OS won't take up that much space? 1TB 2TB HDD's these day cost a few dollars so I don't think that's the real reason. And it can't be bandwidth either since the files are mirrored to many other servers around the globe. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] OT Test
Test received :) On Fri, Sep 23, 2011 at 3:56 PM, Phil Savoie psavoie1...@rogers.com wrote: This is a test sorry for the noise. phil ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Vitualization and Partitioning
On Tue, Sep 13, 2011 at 1:52 AM, Thomas Dukes tdu...@sc.rr.com wrote: -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of ken Sent: Monday, September 12, 2011 12:36 AM To: CentOS mailing list Subject: Re: [CentOS] Vitualization and Partitioning On 09/11/2011 11:10 PM Emmanuel Noobadmin wrote: Hi, When I do the install, do I or should I setup a separate partition for guest That would be better from a performance point of view OS's? From the redhat docs, it looks like the guest OS's reside at /var/lib/libvirt/images/. This should be using files as disk files, which I did and found it to be a problem when there is heavy I/O. I like LVM (for the reasons you cite). Would you (anyone?) say it's best to have one LV per guest or one LV for all guests? tnx. I'm new to this but I would think you would want a separate LV for each guest. Seems I read somewhere, that you need one core per guest as well. That's why I'm opting for the Xeon processor rather than the iCore(x). Four cores v. two. More options. Can't believe this thread hasn't stirred more response. Maybe we all are in the learning phase. Eddie ___ We use LVM on all our virtual hosting servers since it's much easier to manage. You basically setup a PV volume spanning the whole drive(s), and then a 10GB (or larger if you need to) LVM volume for /root, 10GB for /var, 2GB for /tmp 5GB for /home. Then for any VM's just add LVM volumes as needed, for example: /dev/Volume001/vm1_root - 10GB /dev/Volume001/vm1_swap - 1GB Another tip: Don't use the default LVM volume naming scheme, but instead name the LVM volumes according to your server name, i.e. server01 server02. This way if server01's HDD crashes and you need to mount it on server002 for recovery purposes, you won't have conflicting LVM volumes -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Emulate RHEV On CentOS
On Wed, Sep 7, 2011 at 3:24 PM, Gene Poole gene.po...@macys.com wrote: Anyone familiar with RHEV (Red Hat Enterprise Virtualization)? Any ideas on how to emulate this on CentOS? Thanks, Gene Poole ___ You simply need to install the Virtualizartion Group with yum to get it :) How good is it? That will depend on what you prefer to use, between XEN KVM and what you have used in the past. Red Hat (and thus CentOS) has native XEN support but dropped XEN in favor of KVM (which is not as mature yet) in RH 6. I think the only real difference between Red Hat's Enterprise Virtualization and CentOS Virtualization Group could be that Red Hat has a few commercial management tools included. But the underlying core functionality would be the same. I don't use RH, so I don't know exactly, this is just an assumtion. But, be careful of mentioning anything other than actual CentOS related software on this list. Some people here don't like it and will get hostile toward you for mentioning it. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Emulate RHEV On CentOS - A note on Xen v. KVM
On Wed, Sep 7, 2011 at 3:51 PM, Digimer li...@alteeve.com wrote: On 09/07/2011 09:34 AM, Rudi Ahlers wrote: Red Hat (and thus CentOS) has native XEN support but dropped XEN in favor of KVM (which is not as mature yet) in RH 6. This deserves clarification... Red Hat is a business, and made a simple business decision. Maintaining Xen support would have meant maintaining a very large set of patches. They made the decision that the effort (and money) needed to maintain Xen outside of the mainline kernel was not worth it. Well, I merely stated the facts of what the Red Hat Virtualization package offers in the 2 different Red Hat releases, 5 6. KVM was not chosen over Xen so much as KVM was a much less expensive hypervisor to support. As for it being mature or not; Well, put on your kevlar pants because that is a matter of opinion. I'm sure many people will argue against this perception since XEN has been around much longer than KVM and, up to recently,just worked every time. So the amount of effot they (or any other Linux distro) had to put in to support it is minimal. At the same time, in a different camp, there are those who speculate that XEN was dropped since it's the defacto standard for Novell Suse / OpenSuse and it's direct competition for Red Hat. As a follow-up, Xen dom0 support began getting into the mainline kernel at 2.6.33 (EL6 is based on 2.6.32). It is very likely that we will see Xen dom0 support returned in the next major release. That would be nice and I'm sure Red Hat would gain some ground again but if you look on the trend on the web many people stopped using Red Hat (and derivatives of it, like CentOS) because of this very reason. -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org At what point did we forget that the Space Shuttle was, essentially, a program that strapped human beings to an explosion and tried to stab through the sky with fire and math? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6 + XEN problem
On Sun, Sep 4, 2011 at 3:12 PM, Pasi Kärkkäinen pa...@iki.fi wrote: Did you try using mayoung's xendom0 kernel rpms? They're based on actual rhel 6.0/6.1 kernels.. (the kernel you're using now sounds like upstream kernel - not rhel6 kernel). xen hypervisor/tools rpms: http://xenbits.xen.org/people/mayoung/EL6.xen/ xendom0 kernel for el6: http://xenbits.xen.org/people/mayoung/testing/ How stable are those kernels? I couldn't find much info about mayoung on the internet, so I don't know how trustworthy he, or his work is. And: http://wiki.xen.org/xenwiki/RHEL6Xen4Tutorial I read that tutorial but it seems very specific to Red Hat and since I work on CentOS some of the options there don't apply, but I don't know if it could cause any problems. Has anyone applied those steps to a CentOS system? -- Pasi ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS 6 + XEN problem
Hi, Does anyone know what version of XEN works fine with CentOS 6? I installed XEN on a CentOS 6 server, as per these instructions: http://www.crc.id.au/xen-on-rhel6-scientific-linux-6-centos-6-howto/ And the server now gives this error on reboot: PANIC: early exception 0e rip 10:0 error 10 cr2 0 These are the packages that was installed: Installed: kernel-xen.x86_64 0:2.6.32.45-1 xen.x86_64 0:4.1.1-3.1 Dependency Installed: PyXML.x86_64 0:0.8.4-19.el6 SDL.x86_64 0:1.2.14-2.el6 kpartx.x86_64 0:0.4.9-31.el6_0.3 libXdamage.x86_64 0:1.1.2-1.el6 libXfixes.x86_64 0:4.0.4-1.el6libXxf86vm.x86_64 0:1.1.0-1.el6 mesa-dri-drivers.x86_64 0:7.7-2.el6 mesa-libGL.x86_64 0:7.7-2.el6 xen-hypervisor.x86_64 0:4.1.1-3.1 xen-libs.x86_64 0:4.1.1-3.1 xen-licenses.x86_64 0:4.1.1-3.1 xen-runtime.x86_64 0:4.1.1-3.1 -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6 + XEN problem
On Fri, Sep 2, 2011 at 3:49 PM, R P Herrold herr...@owlriver.com wrote: On Fri, 2 Sep 2011, Rudi Ahlers wrote: Does anyone know what version of XEN works fine with CentOS 6? I installed XEN on a CentOS 6 server, as per these instructions: http://www.crc.id.au/xen-on-rhel6-scientific-linux-6-centos-6-howto/ and this issue about a third party writeup is not asked first in that venue, because ? and this issue about a virtualization issue is not asked on the specific virtualization list that Centos offers, because ? and this invasive, non-shipped and competing virtualization method (at the 6 level) and non-shipped and non-supported kernel is asked here, because ? Every time the ten or so people who treat this list like an 'anything goes' sewer post, tens of thousands of uses have to wade through the dross Every time the few here who cannot distinquish email and run untrimmed one line reply emails back and forth, over and over again, rather than using the CentOS provided IRC channels, tens of thousands of uses have to wade through the dross _Please_ be considerate, use the proper venue, brush and floss after meals, and research before posting ;) -- Russ herrold ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Russ because everyone else has the same I don't care, take it elsewhere attitude as you. but don't worry, I'm leaving this childish list as well. have fun -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6 + XEN problem
On Fri, Sep 2, 2011 at 6:02 PM, R - elists list...@abbacomm.net wrote: Can we discontinue this and return to tranquillity please ? Paul. Paul, with all humility due respect, if I was given authority within CentOS and on this list, you would be one of the first we would discipline... - rh ___ Russ why don't you just discipline everyone? Cause no-one can stick to CentOS-only conversations in your righteous eyes. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6 Partitioning Help
On Thu, Sep 1, 2011 at 3:14 PM, Lamar Owen lo...@pari.edu wrote: On Wednesday, August 31, 2011 10:07:01 PM Always Learning wrote: I assume your machine is a single user machine. If so, I would suggest He stated clearly in his request that this was for a server, by definition a multi-user machine (each server process should, after all, run as a unique user) serving requests to many users. Advice for a single-user desktop won't help him. ___ just goes to show how well people actually read anything on the internet these days. and then they can't understand why the original poster gets irritated when he's told to use a hammer to hit the nail into the wall, when asked what color your car is. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] PANIC: early exception 0e rip 10:0 error 10 cr2 0
Hi all, I installed XEN on a CentOS 6 server, as per these instructions: http://www.crc.id.au/xen-on-rhel6-scientific-linux-6-centos-6-howto/ And the server now gives this error on reboot: PANIC: early exception 0e rip 10:0 error 10 cr2 0 These are the packages that were installed before the reboot: Total download size: 33 M Installed size: 116 M Is this ok [y/N]: y Downloading Packages: (1/14): PyXML-0.8.4-19.el6.x86_64.rpm | 892 kB 00:00 (2/14): SDL-1.2.14-2.el6.x86_64.rpm | 193 kB 00:00 (3/14): kernel-xen-2.6.32.45-1.x86_64.rpm | 20 MB 00:12 (4/14): kpartx-0.4.9-31.el6_0.3.x86_64.rpm | 37 kB 00:00 (5/14): libXdamage-1.1.2-1.el6.x86_64.rpm | 16 kB 00:00 (6/14): libXfixes-4.0.4-1.el6.x86_64.rpm | 19 kB 00:00 (7/14): libXxf86vm-1.1.0-1.el6.x86_64.rpm | 18 kB 00:00 (8/14): mesa-dri-drivers-7.7-2.el6.x86_64.rpm | 1.5 MB 00:00 (9/14): mesa-libGL-7.7-2.el6.x86_64.rpm | 144 kB 00:00 (10/14): xen-4.1.1-3.1.x86_64.rpm | 1.0 MB 00:00 (11/14): xen-hypervisor-4.1.1-3.1.x86_64.rpm | 3.8 MB 00:01 (12/14): xen-libs-4.1.1-3.1.x86_64.rpm | 309 kB 00:00 (13/14): xen-licenses-4.1.1-3.1.x86_64.rpm | 63 kB 00:00 (14/14): xen-runtime-4.1.1-3.1.x86_64.rpm | 4.9 MB 00:02 - Total 1.7 MB/s | 33 MB 00:20 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : libXfixes-4.0.4-1.el6.x86_64 1/14 Installing : libXdamage-1.1.2-1.el6.x86_64 2/14 Installing : SDL-1.2.14-2.el6.x86_64 3/14 Installing : kpartx-0.4.9-31.el6_0.3.x86_64 4/14 Installing : mesa-dri-drivers-7.7-2.el6.x86_64 5/14 Installing : PyXML-0.8.4-19.el6.x86_64 6/14 Installing : libXxf86vm-1.1.0-1.el6.x86_64 7/14 Installing : xen-licenses-4.1.1-3.1.x86_64 8/14 Installing : xen-libs-4.1.1-3.1.x86_64 9/14 Installing : mesa-libGL-7.7-2.el6.x86_64 10/14 Installing : xen-hypervisor-4.1.1-3.1.x86_64 11/14 Installing : xen-runtime-4.1.1-3.1.x86_64 12/14 Installing : xen-4.1.1-3.1.x86_64 13/14 Installing : kernel-xen-2.6.32.45-1.x86_64 14/14 Added 'installonlypkgs' line to /etc/yum.conf! Installed: kernel-xen.x86_64 0:2.6.32.45-1 xen.x86_64 0:4.1.1-3.1 Dependency Installed: PyXML.x86_64 0:0.8.4-19.el6 SDL.x86_64 0:1.2.14-2.el6 kpartx.x86_64 0:0.4.9-31.el6_0.3 libXdamage.x86_64 0:1.1.2-1.el6 libXfixes.x86_64 0:4.0.4-1.el6libXxf86vm.x86_64 0:1.1.0-1.el6 mesa-dri-drivers.x86_64 0:7.7-2.el6 mesa-libGL.x86_64 0:7.7-2.el6 xen-hypervisor.x86_64 0:4.1.1-3.1 xen-libs.x86_64 0:4.1.1-3.1 xen-licenses.x86_64 0:4.1.1-3.1 xen-runtime.x86_64 0:4.1.1-3.1 Has anyone seen this? the server is in a DC in America so I need todo everything over the internet from South Africa and the KVM is a bit slow. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Apache warns Web server admins of DoS attack tool
On Fri, Aug 26, 2011 at 9:45 AM, Kenneth Porter sh...@sewingwitch.com wrote: I don't see any mention of this in the CentOS announcements forum. I'd consider dropping the mailing list and switching to forums if this kind of warning appeared there. https://www.centos.org/modules/newbb/viewforum.php?forum=53 ___ The CentOS forum is pretty useless IMO -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Off topic list for centos please?
On Thu, Aug 25, 2011 at 12:53 PM, Karanbir Singh mail-li...@karan.org wrote: On 08/25/2011 11:00 AM, Keith Roberts wrote: Could we have a centos-offtopic list please, so anything that would be considered OT can be posted there? an offtopic list would need to come with a lot more moderation here then. - KB ___ areed, and the OT list would probably abused so much that it may be closed altogether. My suggestion: Why not use mailman topics feature for this, and then the guys who feel everything where the word CentOS isn't exclusively mentioned is OT, can un-subscribe from those topics? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] UPS issues with PFC PSU
How exactly is it OT if he needs the UPS to talk to CentOS?? please stop being so stuckup On Wed, Aug 24, 2011 at 9:26 AM, Kai Schaetzl mailli...@conactive.com wrote: Sorry to be mean. But there are things off-topic and there are things ooo-tooocc. And this one belongs in the second category. Really, please take this elsewhere. Thanks. Kai ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] UPS issues with PFC PSU
On Thu, Aug 25, 2011 at 1:18 AM, John R. Dennison j...@gerdesas.com wrote: On Thu, Aug 25, 2011 at 01:04:59AM +0200, Rudi Ahlers wrote: How exactly is it OT if he needs the UPS to talk to CentOS?? Please don't top-post. Because the original post made no mention of CentOS at all. At least that's my guess and that's also the first impression I had about the post. well, where else would he connect the UPS to? His fish tank? Surely if someone has a PC, and is subscribed to a Linux mailing linux and asks for advice on a hardware device then it would be related to compatibility as well. Someone running Windows probably wouldn't even know if there are other brands available than what he can get from his local PC shop. And just about every single piece of hardware, which can be purchased from any shop will always work on Windows. So why would he bother asking if it would work? please stop being so stuckup Please understand that this list has been filled with off-topic garbage over the past year or so and many of us are getting more than a little frustrated with it. Many people that have been here for years have unsub'd and many more continue to mention that as a possibility. Add to that the fact that some of the centos team themselves are no longer on this list and that should tell you something. While this thread turned out to have a centos connection the same can not be said for many of the others over the past year. EVEN if that's the case (staff leaving and people getting irretated), it's still no reason to be rude with someone without knowing all the facts to his question first. Many people would rather trust the advice given on a list like this than the advice given by a sales rep. Just cause you're a genius and don't need any help with anything ever, doesn't mean the next guy is as clever as you. John -- As Americans we must always remember that we all have a common enemy, an enemy that is dangerous, powerful and relentless. I refer, of course, to the federal government. -- Dave Barry (3 July 1947-), Pulitzer Prize-winning American author and columnist, Knight Ridder syndicate, New York Daily News, 12 December 2004 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 4:13 AM, Craig White craigwh...@azapple.com wrote: On Wed, 2011-08-17 at 21:50 +0200, Rudi Ahlers wrote: Hi, I'm looking for a firewall (preferably on Linux / UNIX) that could automatically block bandwidth abusers as soon as a connection goes over a certain speed, or limit - i.e. either more than say 3Mb/s or 10GB in a giving period (like weekly / monthly). But, I need it to block the IP to, or where the traffic comes from, or goes to. i.e. a user logs into a web server and upload a LOT of data, then the firewall should block him, but not other people. Or, someone uploads a small bit of data but downloads a lot of data and then get's blocked. But I need to set thresholds And I should be able to exclude certain IP's / domains from the limits. Does this make sense? Can this be done with iptables? If so, how? If not, what else could I use for this? A normal DDOS prevention firewall doesn't really work since it only blocks traffic coming in. But I need to limit traffic going out as well. The servers behind the firewall will serve mail, http, ftp, sql and SSH http://tinyurl.com/3n5yn8u Craig We already monitor traffic usage on the switches with cacti via SNMP. But, I need to block traffic abusers automatically. from any IP address, to any IP address. The firewalls we have, and have tested all need a set of IP addresses to throttle, which won't work in this case. A user can login from any IP address on the internet, and either upload or download exsesively and we need to block that IP address as soon as it's reaches a certain (pre-set by us) threshold -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] using posfix on the local LAN, with internet FQDN
Hi all, I hope someone can help me with this please. One of our clients has an in-house Postfix mailserver which basically downloads mail for the individual users from our mail server hosted on the web using fetchmail. They use our SMTP server to send mail. Their email clients are then setup to get send mail from the server, on 192.168.2.254 (for POP3 SMTP). All mail between them on the local LAN gets send to each other via the server, and not the internet. This works quite well, but as soon as someone sends mail from the Linux server directly (it has webmin + usermin installed and has a basic webmail interface for when they're out of the office) it sends mail using the local machine name, instead of the domain name. for example, mail comes from esther@ser001.rewards.local. How do I tell Postfix to automaticlly send mail from user@theirdomain.com instead? Sorry for asking this, but I don't know Postfix very well and don't know what to call to, to search on google. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] using posfix on the local LAN, with internet FQDN
On Thu, Aug 18, 2011 at 3:00 PM, Leen de Braal l...@braha.nl wrote: myhostname = mail.braha.nl myorigin = $mydomain Think the second one is what you need. L. de Braal BraHa Systems NL - Terneuzen T +31 115 649333 F +31 115 649444 ___ I actually had theirdomain.com in both otions, but changed the second option to $mydomain and that didn't make any difference either. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
Let's try again: I need to automatically block any user who abuses bandwidth, either incoming or outgoing. I should be able to set the limits, in either rate/s or usage/s: 1Mb/s or 10GB/h, for example. Then, any users, connecting from anywhere, on any IP should be blocked - either if he uploads or downloads (i.e ingres outgres) for a specific amount of time. My research: The firewalls which we've tried (both normal Linux iptables and hardware based firewalls) can do this, as long as I can specify the IP's to block - this is standard for an office-type firewall. BUT, I don't have a range of IP's to specify since these particular servers are on the internet, thus any possible IP on the net could connect to the server. I also need to exclude certain IP's from this rule (i.e. for backup servers which actually need to transfer a lot of traffic). To some degree this would mean traffic accounting, but that just keeps a log of traffic usage. And we already measure traffic use with cacti SNMP. Cacti can send us an email if a certain amount of bandwidth is used up, but it doesn't tell the firewall to block the offending IP address. DDOS protection type firewalls doesn't help much either since they only block incoming attacks, but not really normal uploads. They also don't block outgoing traffic once the condition is met. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 9:09 PM, Always Learning cen...@u61.u22.net wrote: On Thu, 2011-08-18 at 21:01 +0200, Rudi Ahlers wrote: I need to automatically block any user who abuses bandwidth, either incoming or outgoing. I should be able to set the limits, in either rate/s or usage/s: 1Mb/s or 10GB/h, for example. First question is: (a) how can you get the IP address ? I don't fully understand your question? How do you get any IP address from any machine that connects to a server on the internet? netstat shows the IP's, /var/log/http/access.log shows the IP's and I'm sure it's listed in other places as well. We currently use ntop to monitor the server's usage, but there's no way to automatically block an abusive IP. (b) how can you introduce a, or use an existing, system to record and store the data amounts (bandwidth) and IP addresses ? What do you mean? (c) how long will this information be retained before being discarded ? How long will what information be retained? And what for? I don't understand the nature of this question? (d) how can you monitor on every change to the data amount ? Again, I don't understand what you mean? (e) will it do both IP4 and IP6 ? Does it matter? IPV6 is already being used on a wide scale. iptables support both (f) what mechanism can you use to block the IP address ... IP Tables via simple BASH command ? if that will do the trick, yes. Any way to block the IP would be fine. iptables would probably be easiest. Ideally I would like to get a dedicated firewall, or dedicated Linux / UNIX firewall appliance for this purpose as it needs to monitor and protect a whole bunch of servers Its an interesting requirement. -- With best regards, Paul. England, EU. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 9:21 PM, Les Mikesell lesmikes...@gmail.com wrote: On 8/18/2011 2:01 PM, Rudi Ahlers wrote: Let's try again: I need to automatically block any user who abuses bandwidth, either incoming or outgoing. I should be able to set the limits, in either rate/s or usage/s: 1Mb/s or 10GB/h, for example. Then, any users, connecting from anywhere, on any IP should be blocked - either if he uploads or downloads (i.e ingres outgres) for a specific amount of time. Those requirements don't mesh very well with the real world. That is, people use use a network that they've been provided or paid for aren't necessarily 'abusing' anything, and blocking access at times when the network isn't fully loaded doesn't help anyone. What's the big picture here? Don't you really need QOS to throttle certain things at peak times only? -- Les Mikesell lesmikes...@gmail.com ___ Les, it's not really about blocking people who paid. the servers in question provide a free service and no money is generated from it, but the client still pays for bandwidth so we'd like to cap heavy users a bit to avoid expensive bills. I know the requirements are strange, but I'm really hoping I could find something that could do this for us. Right now they have someone who monitors ntop and block IP's that way around, but it's inefficient and a salary which could have been spent elsewhere. Bandwidth in our country is exuberantly expensive, probably about 20x the price of bandwidth in the USA -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 9:25 PM, Mike m...@microdel.org wrote: On Thu, 18 Aug 2011, Rudi Ahlers wrote: Let's try again: I need to automatically block any user who abuses bandwidth, either incoming or outgoing. I should be able to set the limits, in either rate/s or usage/s: 1Mb/s or 10GB/h, for example. Then, any users, connecting from anywhere, on any IP should be blocked - either if he uploads or downloads (i.e ingres outgres) for a specific amount of time. As one might imagine there is at least one commercial product that seems to fit the bill. http://www.aspirantinfotech.com/downloads/Cyberoam/pdf/Managing-bandwidth-the-User-based-approach.pdf I mention this as I thought it was well written and thorough. After reading the pdf seems to me there ought to be something open source based upon perhaps this: http://lartc.org/lartc.html Anyway maybe some food for thought. ___ Thanx. We already tried the cyberoams, but they didn't work as expected since they manage bandwidth on a per-user basis, and our users come from the world-wide-web. I have read through that document link on http://lartc.org/lartc.html#AEN1393 and the closest I could get is rate limiting, but that doesn't actually block the IP if it goes over a certain threshold, it just slows everything down. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 9:29 PM, Les Mikesell lesmikes...@gmail.com wrote: On 8/18/2011 2:15 PM, Rudi Ahlers wrote: On Thu, Aug 18, 2011 at 9:09 PM, Always Learningcen...@u61.u22.net wrote: On Thu, 2011-08-18 at 21:01 +0200, Rudi Ahlers wrote: I need to automatically block any user who abuses bandwidth, either incoming or outgoing. I should be able to set the limits, in either rate/s or usage/s: 1Mb/s or 10GB/h, for example. First question is: (a) how can you get the IP address ? I don't fully understand your question? How do you get any IP address from any machine that connects to a server on the internet? netstat shows the IP's, You said 'user' which may or may not map to a consistent, single, IP address. well, a 'user' is anyone accessing the server from the internet, so the IP's will change the whole time. /var/log/http/access.log shows the IP's and I'm sure it's listed in other places as well. Are these web browser clients, locally attached PCs, or what? web / SQL / SMTP / POP3 clients, connecting from the internet. We currently use ntop to monitor the server's usage, but there's no way to automatically block an abusive IP. What's 'abusive'? If they are using a web app, let the app monitor the connection of a logged in user and handle them appropriately. yes, but no monitor can block their IP, that I'm aware of. Ideally I would like to get a dedicated firewall, or dedicated Linux / UNIX firewall appliance for this purpose as it needs to monitor and protect a whole bunch of servers A separate box won't know what is going on. Suppose you have a remote mail server relaying in or out for a large number of users. The intermediate box will see a lot of smtp traffic to/from one IP, but it will correspond to a lot of users. Likewise for web users behind a company proxy. For this very reason I need to exclude certain IP's from the limits. -- Les Mikesell lesmikes...@gmail.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 9:38 PM, Mike m...@microdel.org wrote: I have read through that document link on http://lartc.org/lartc.html#AEN1393 and the closest I could get is rate limiting, but that doesn't actually block the IP if it goes over a certain threshold, it just slows everything down. So I'm not sure I fully understand your requirements. Why isn't slowing the user to zero or at least near zero sufficient? How do I slow one user down, without affecting the others? The way I understand rate limiting is that you rate limit a certain protocol / port, or IP / IP range. So, how would I automatically slow down someone (on any IP address, and accessing any protocol) once he hits a certain threshold / limit? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 9:38 PM, Les Mikesell lesmikes...@gmail.com wrote: Are you paying for bandwidth by total bits transferred or by peak or 95th percentile rate? We pay per MB and the servers are connected to a 100MB/s port. You should be able to automate what you are doing with ntop. Or use a netflow collector to centralize the traffic counting and translate your rules into iptables settings. Really? That would be great. But, I'm not a programmer, so I don't know where to start. And, I need to protect a whole bunch of servers, so ideally this should be done either on a central gateway which connects on the other side of the switch, or a firewall appliance. Any suggestions? -- Les Mikesell lesmikes...@gmail.com -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Thu, Aug 18, 2011 at 9:52 PM, Mike m...@microdel.org wrote: On Thu, 18 Aug 2011, Rudi Ahlers wrote: On Thu, Aug 18, 2011 at 9:38 PM, Mike m...@microdel.org wrote: I have read through that document link on http://lartc.org/lartc.html#AEN1393 and the closest I could get is rate limiting, but that doesn't actually block the IP if it goes over a certain threshold, it just slows everything down. So I'm not sure I fully understand your requirements. Why isn't slowing the user to zero or at least near zero sufficient? How do I slow one user down, without affecting the others? The way I understand rate limiting is that you rate limit a certain protocol / port, or IP / IP range. So, how would I automatically slow down someone (on any IP address, and accessing any protocol) once he hits a certain threshold / limit? I think I understand now and the short answer is that you can't! In other words you're saying that say Steve is using a ton of bandwidth so you want to block him. But Fred and 10 other users that may be at the same IP address are fine and you don't want to block them. I mean you could conceptually at least block the IP/Source port that Steve is coming from right now. But the source port (and perhaps IP) will eventually change and your block is now useless. ___ No, not quite. Steve will have a different IP from Fred. I don't care so much about the users as such, but rather the IP where the connection is from, and to. i.e. I don't need to know what the user's name is, nor match him to a DB like LDAP or something. I purely need to block an abusive IP. BUT, if Steve changes his IP to circumvent the block, then his new IP should be blocked as well. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] which firewall to automatically block bandwidth abusers?
On Fri, Aug 19, 2011 at 12:57 AM, Always Learning cen...@u61.u22.net wrote: On Thu, 2011-08-18 at 21:56 +0200, Rudi Ahlers wrote: BUT, if Steve changes his IP to circumvent the block, then his new IP should be blocked as well. How will you know Steve has successfully circumvented your block until until the same Steve, with IP2, eventually exceeds the 'quota' ? And if Steve gets away with that, he can probably try again with IP3 and IP4 etc. - making a mockery of your bandwidth restriction. -- The point it, it doesn't matter who the user is. As soon as an IP, any IP exceeds the limit, it should get blocked. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] SAS storage arrays, C6, and SES lights
On Wed, Aug 17, 2011 at 8:26 AM, Christopher Chan christopher.c...@bradbury.edu.hk wrote: OpenIndiana has all that builtin... /me ducks. - Original Message - Yes, and so does many commercial NAS appliances that run on Linux - but do you think they'll tell us how they got it working? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Web Site centos.org is down
On Wed, Aug 17, 2011 at 7:59 PM, Paul Heinlein heinl...@madboa.com wrote: On Wed, 17 Aug 2011, Always Learning wrote: Can not http, ping or traceroute centos.org, www.centos.org or 72.232.194.162 (the IP address for both) Tried from two places in England on different unrelated networks. As others have said, it works fine from the US. But one of our engineers is in Spain at the moment and he's having some routing trouble to US sites. -- It works fine from South Africa as well. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] which firewall to automatically block bandwidth abusers?
Hi, I'm looking for a firewall (preferably on Linux / UNIX) that could automatically block bandwidth abusers as soon as a connection goes over a certain speed, or limit - i.e. either more than say 3Mb/s or 10GB in a giving period (like weekly / monthly). But, I need it to block the IP to, or where the traffic comes from, or goes to. i.e. a user logs into a web server and upload a LOT of data, then the firewall should block him, but not other people. Or, someone uploads a small bit of data but downloads a lot of data and then get's blocked. But I need to set thresholds And I should be able to exclude certain IP's / domains from the limits. Does this make sense? Can this be done with iptables? If so, how? If not, what else could I use for this? A normal DDOS prevention firewall doesn't really work since it only blocks traffic coming in. But I need to limit traffic going out as well. The servers behind the firewall will serve mail, http, ftp, sql and SSH -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] SAS storage arrays, C6, and SES lights
On Tue, Aug 16, 2011 at 4:03 PM, John R Pierce pie...@hogranch.com wrote: On 08/16/11 12:59 AM, Pasi Kärkkäinen wrote: ie. you need a daemon/tool that monitors status of disks, and keeps the Linux disk- ses slot mapping up-to-date. i'm amazed this doesn't exist. isn't this a really common problem with storage arrays? -- john r pierce N 37, W 122 santa cruz ca mid-left coast yup. I inquired about it a while ago (something about switching LED's on) and didn't get very far either. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can two machines in the same network have the same hostname with different IPs?
On Tue, Aug 9, 2011 at 12:03 PM, Indunil Jayasooriya induni...@gmail.com wrote: On Tue, Aug 9, 2011 at 3:13 PM, Diego Sanchez dieg...@gmail.com wrote: Are you trying to use Round Robin DNS? Yes, you can But, remember.. If you use same hostname, the client will access to them in random thanks for the quick answer. NOT to use Round robin DNS. on one server, under /etc/sysconfig/network hostname field HOSTNAME=mail.example.com and /etc/sysconfig/network-scripts/ifcfg-eth0 file IPADDR=192.168.0.1 on the other server, under /etc/sysconfig/network hostname field also HOSTNAME=mail.example.com and /etc/sysconfig/network-scripts/ifcfg-eth0 file IPADDR=192.168.0.2 is it possible? is it recommend? my task is to have 2 zimbra servers with mail.example.com with 2 ips 192.168.0.1 is the primary, I want to rsync /opt of this server to the other server 192.168.0.2. then, primary fails, I have a backup on the other server. no data lost This is what I want to achieve. but, NOT for any kind of ROUND ribbon DNS stuff.. is it possible? is it recommend? Pls answer? Diego actually already answered you. And yes it can be done. And, yes, it's generally used for round robin DNS, whether you actually want to use round robin DNS or not. P.S. Please don't top-post. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] setting up bare minimal CentOS VM
Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Wed, Aug 10, 2011 at 12:16 AM, Scott Silva ssi...@sgvwater.com wrote: on 8/9/2011 3:10 PM Rudi Ahlers spake the following: Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? I think they are creating a minimal install CD image, if they haven't already released it. ___ Well, I setup CentOS 6 using the netinstall ISO, but want to know if there are still packages which I don't need and can remove -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Wed, Aug 10, 2011 at 12:23 AM, Craig White craig.wh...@ttiltd.com wrote: On Aug 9, 2011, at 3:10 PM, Rudi Ahlers wrote: Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? do you mean as in /root/anaconda-ks.cfg ? Craig ___ Craig, yes, and no. I am actually looking for a list of software packages that can be removed without breaking the running OS. like for example bluez-libs or cronie-anacron which isn't necessarily needed for a bare-minimum system to run. I honestly don't just want to delete stuff that I don't know if it could break something, so I was hoping maybe someone knows of a list (on a wiki / blog / etc) that has a really bare minimum list of software that needs to be on a server to function. I could install anything else later on if I need to though. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Wed, Aug 10, 2011 at 12:41 AM, Scott Silva ssi...@sgvwater.com wrote: snip Craig, yes, and no. I am actually looking for a list of software packages that can be removed without breaking the running OS. like for example bluez-libs or cronie-anacron which isn't necessarily needed for a bare-minimum system to run. I honestly don't just want to delete stuff that I don't know if it could break something, so I was hoping maybe someone knows of a list (on a wiki / blog / etc) that has a really bare minimum list of software that needs to be on a server to function. I could install anything else later on if I need to though. I really think the minimal CD would be about as lean as you would want to go. You could maybe trim a few megs, but is it worth the extra work? ___ Hi Scott, I didn't know about the minimal CD until now. And it's not really about trimming a few extra megs, but rather about removing, and disabling services which users generally won't use but gets installed and often cause security issues down the road cause it was never disabled -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Looking for ntop alternative
Hi, Can anyone please recomment an ntop alternative for me, which is more stable as well? I need to monitor all connections to and from a CentOS 5 server and ntop does it fairly well, but seems to crash at random times, and thus looses all the date prior to the crash. Cacti / MRTG only gives complete bandwidth usage on the given interface, but I need to know how much bandwidth goes where, and comes from where on which protocol etc. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] centos6 xen
On Thu, Jul 28, 2011 at 11:23 AM, Peter Peltonen peter.pelto...@gmail.com wrote: Hi, A few more questions :) On Thu, Jul 28, 2011 at 11:56 AM, John R. Dennison j...@gerdesas.com wrote: On Thu, Jul 28, 2011 at 10:53:23AM +0200, Juergen Gotteswinter wrote: i think i am not the only one who wants to stay with with xen :) Far from it. Xen still has a place as a dom0. What are the reasons for people staying with Xen as dom0, just the learning curve? Or are there some technical considerations as well? KVM is not as mature as XEN. yet? And if you want to use a so called Enterprise Operating System like CentOS, then you'd probably expect a stable and enterprise grade virtualization kernel as well. KVM, IMO (and others as well ) is not enterprise ready yet. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Adding the [SOLVED] Tag to break threads
On Thu, Jul 28, 2011 at 3:19 PM, Keith Roberts ke...@karsites.net wrote: Is that why it's frowned upon to use a current thread to start a new one? Like doing a 'reply to' and then changing the subject line? Kind Regards, Keith Roberts - Yup. Even if you change the subject, the email headers still remain and many email clients use the email headers to group the mails relevant to that conversation -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to remove Microsoft soft raid?
On Thu, Jul 21, 2011 at 1:24 PM, David McGuffey davidmcguf...@verizon.net wrote: Have a quad core workstation that was running WinXP_64 that I want to blow away and install CentOS 6. C6 install process finds raid metadata associated with sda and sdb, and then excludes them from the rest of the installation process. There doesn't appear to be an option for disassembling the raid as part of the install process. I think there should be. Any tricks to removing/by-passing the soft raid left over from the previous OS? Dave M ___ Can you see the 2 HDD's in the console, when you run fdisk -l? If so, then simply use fdisk to remove all the partitions, then use the installer to partition and format them -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ext4 in CentOS 5.6?
On Wed, Jul 6, 2011 at 6:17 AM, John R Pierce pie...@hogranch.com wrote: On 07/05/11 9:04 PM, Charles Polisher wrote: The PostgreSQL wiki seems to say that database tables are allocated in 1GB extents. In workloads with which I am familiar, with an RDBMS the extents don't bounce around all that much, i.e. the vast majority of writes do not result in a change to the underlying database's storage allocation. Once in a while a new extent is allocated. http://www.postgresql.org/docs/current/static/storage-file-layout.html I suppose there could be exceptions, but I haven't run across one personally. you misread that. When a table or index exceeds 1 GB, it is divided into gigabyte-sized/segments/. The first segment's file name is the same as the filenode; subsequent segments are named filenode.1, filenode.2, etc. This arrangement avoids problems on platforms that have file size limitations. ... Each file is no larger than 1GB (by default), but its written and expanded as needed, not in any fixed size increment. The WAL files you refer to are apparently database transaction logs. According to the wiki, these too are allocated in extents (WAL segments) of 16MB each. The wal logs are 16M files, also written sequentially as needed, and nearly continuously on a insert/update intensive database. they are not reused, rather, old wal files are deleted (unless you're archiving), and new ones are created continuously. -- john r pierce N 37, W 122 santa cruz ca mid-left coast ___ Hi Everyone, I just tried to install EXT4 onto a CentOS 5 machine but it failed. Does anyone know in which repository it is? root@usaxen01:[~]$ cat /etc/redhat-release CentOS release 5 (Final) root@usaxen01:[~]$ uname -a Linux usaxen01 2.6.18-8.1.15.el5xen #1 SMP Mon Oct 22 09:01:12 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux root@usaxen01:[~]$ yum -y install e4fsprogs Loading installonlyn plugin Setting up Install Process Setting up repositories Reading repository metadata in from local files Excluding Packages in global exclude list Finished Parsing package install arguments Nothing to do -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS-6 firewall how to open a port
On Sun, Jul 17, 2011 at 6:05 PM, david da...@daku.org wrote: At 08:53 AM 7/17/2011, you wrote: Timothy Murphy wrote: I'm running CentOS-6 on an HP MicroServer (since this morning) and I'd like to open an non-standard port, for use on a laptop attached to the internet through the server. (snip) Any advice or suggestions gratefully received. Use System - Administration - Firewall from GUI. Or /usr/bin/system-config-firewall from SSH/console TUI. Ljubomir I loaded my system with text-install and network, and find no file named /usr/bin/system-config-firewall. My guess is that it comes with a package that I haven't installed. Can you identify that package? Thanks David ___ yum install system-config-network -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] firewall?
On Sat, Jul 16, 2011 at 1:18 PM, Fajar Priyanto fajar...@arinet.org wrote: On Sat, Jul 16, 2011 at 6:47 PM, Ljubomir Ljubojevic off...@plnet.rs wrote: You might be interested in shorewall[1]. It has config file and extensive documentation. You tell it what you want and all iptables are automatically set. It also has webmin module. There are rpm's for CentOS 5 but I think they would be OK also on the CentOS 6. [1]: http://www.shorewall.net/ Hadi, With all the suggestions, I believe it's enough to get you going. iptables, shorewall, webmin. All you have got to do know is to google around using those keywords, and start learning by yourself. Google has everything. ___ But, sadly google can't teach someone to start making their own choices or to think for themselves -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] firewall?
On Sat, Jul 16, 2011 at 1:46 PM, Ljubomir Ljubojevic off...@plnet.rs wrote: Fajar Priyanto wrote: Do this: 1. Make sure your Centos has two network card. One connected to internet, one to local lan. Make sure the Centos can already browsing internet. Example internet: eth0 192.168.1.1 local: eth1 192.168.2.1 Just as a FYI, shorewall does support single NIC systems, and it also supports Multiple Internet connection scenarios. That being said, one should *never* create firewall with only one NIC! It is highly unsafe. Ljubomir How exactly is it unsafe? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] firewall?
On Sat, Jul 16, 2011 at 2:01 PM, Drew drew@gmail.com wrote: That being said, one should *never* create firewall with only one NIC! It is highly unsafe. So I shouldn't run a firewall on any of my hundreds of single nic instances? I think he's referring to the standard router/firewall scenario where the server is an internet gateway for a network. There I'd consider a single interface system as inherently insecure. -- Drew Nothing in life is to be feared. It is only to be understood. --Marie Curie ___ well there's no real reason why a single NIC firewall should be insecure. We're all referring a normal PC (or even server) with CentOS installed on it, not a commercial firewall. If you setup different IP subnets on the same NIC and routing between them, the same way as between 2 NIC's then you'll still have the same level of firewalling. And I'm sure you could setup VLAN's on the switch for the different IP subnets to make it more secure as well. The one place where this is commonly used is with a PPPoE ADSL switch where the ADSL firewall establishes the PPPoE connection and then shares the internet to the LAN as well using the same ADSL modem's wifi connection. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] firewall?
On Sat, Jul 16, 2011 at 2:20 PM, Ljubomir Ljubojevic off...@plnet.rs wrote: Keith Roberts wrote: So I guess I could configure my single NIC Centos 5.6 machine connected to a 4 port ADSL router to act as the external Gateway for other machine on the LAN side of the router, possibly using NAPT on the Centos box? Yes, you can do that. You can also use it as a proxy server. When I said firewall, I meant as firewall for the network, facing outside of the local network. There were people who would bring public (or semi-public, from ISP) IP to the switch and then hook up all PC's to that switch and use 2 subnets, one that ISP provided and one for the local LAN, all on the same switch, to save on hardware. That is not safe and not wise. Sure, if the 2 subnets were just NAT'ed then it wouldn't be very safe. But if you have propper firewall rules in place to block incoming traffic from the public IP going to the private IP then it's very safe. Ljubomir ___ -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] firewall?
On Sat, Jul 16, 2011 at 2:44 PM, Ljubomir Ljubojevic off...@plnet.rs wrote: But if you have public network passing through local area switch, then there is possibility o hackers using lower network layers to access unprotected PC's on that local network. Not long-distance hackers, but in case of physical presence outside of your network they could assign virtual IP to the MAC addresses of your PC's and access it directly that way, not to mention danger of PC's bypassing your one-NIC firewall and unsafely connecting to the outside. Ljubomir ___ local hackers is a matter all on it's own :) I have seen many cases on clients networks where they use an expensive commercial firewall (brand doesn't matter here, but let's say for example Cyberoam, Cisco, HP etc) and still have problems with hackers on the local LAN cause they didn't think of setting up propper security on the LAN as well. The fact is, you can use a Linux firwall with a single NIC, as long as you use different IP subnets and strong iptables rules to filter traffic properly between the 2 subnets. another scenarion where this is used more and more these days is with virtualization, where you won't have different NIC's for each virtual server on the same physical server. The only way to firewall that traffic is to use iptables and VLAN's. And many many hosting companies use virtual hosting for their clients. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] firewall?
On Sat, Jul 16, 2011 at 2:56 PM, Drew drew@gmail.com wrote: not to mention danger of PC's bypassing your one-NIC firewall and unsafely connecting to the outside. That I think is the biggest danger with a one NIC setup. Linux boxen may be safe(r) (then windows) from being infected or hacked but just one malicious machine can bypass the security in place if you don't logically *and* physically separate your subnets. -- Drew You can have the same problem with a multi-NIC firewall, by the way. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] really large file systems with centos
On Fri, Jul 15, 2011 at 12:35 AM, Don Krause dkra...@optivus.com wrote: On Jul 14, 2011, at 12:56 PM, Pasi Kärkkäinen wrote: On Thu, Jul 14, 2011 at 04:53:11PM +0300, Pasi Kärkkäinen wrote: On Wed, Jul 13, 2011 at 11:32:14PM -0700, John R Pierce wrote: I've been asked for ideas on building a rather large archival storage system for inhouse use, on the order of 100-400TB. Probably using CentOS 6. The existing system this would replace is using Solaris 10 and ZFS, but I want to explore using Linux instead. We have our own tomcat based archiving software that would run on this storage server, along with NFS client and server. Its a write once, read almost never kind of application, storing compressed batches of archive files for a year or two. 400TB written over 2 years translates to about 200TB/year or about 7MB/second average write speed. The very rare and occasional read accesses are done by batches where a client makes a webservice call to get a specific set of files, then they are pushed as a batch to staging storage where the user can then browse them, this can take minutes without any problems. My general idea is a 2U server with 1-4 SAS cards connected to strings of about 48 SATA disks (4 x 12 or 3 x 16), all configured as JBOD, so there would potentially be 48 or 96 or 192 drives on this one server. I'm thinking they should be laid as as 4 or 8 or 16 seperate RAID6 sets of 10 disks each, then use LVM to put those into a larger volume. About 10% of the disks would be reserved as global hot spares. So, my questions... D) anything important I've neglected? Remember Solaris ZFS does checksumming for all data, so with weekly/monthly ZFS scrubbing it can detect silent data/disk corruption automatically and fix it. With a lot of data, that might get pretty important.. Oh, and one more thing.. if you're going to use that many JBODs, pay attention to SES chassis management chips/drivers and software, so that you get the error/fault LEDs working on disk failure! -- Pasi And make sure the assembler wires it all up correctly, I have a JBOD box, 16 drives in a supermicro chassis, where the drives are numbered left to right, but the error lights assume top to bottom. The first time we had a drive fail, I opened the RAID management software, clicked Blink Light on the failed drive, pulled the unit that was flashing, and toasted the array. (Of course, NOW it's RAID6 with hot spare so that won't happen anymore..) -- Don Krause This message represents the official view of the voices in my head. Which is why nobody should use RAID5 for anything other than test purposes :) -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] use of MAILTO variable in crontab
On Wed, Jul 13, 2011 at 9:10 PM, James B. Byrne byrn...@harte-lyne.ca wrote: On Wed Jul 13 15:03:40 EDT 2011, Michael Best mbest at pendragon.org wrote: Like this: MAILTO=testaddr at harte-lyne.ca 30 2 * * * echo this should be mailed That sets MAILTO for the entire crontab does it not? I want to set MAILTO differently for specific crontab entries. Is that possible? How is it done? Or do I have to pipe stuff to /usr/bin/mail explicitly? Easy: MAILTO=root 30 2 * * * echo this should be mailed to root MAILTO=james@harte.x.x 30 4 * * * echo this should be mailed to James MAILTO=bob 30 5 * * * echo this should be mailed to Bob MAILTO= 30 6 * * * echo this should be mailed to no-one -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] use of MAILTO variable in crontab
On Thu, Jul 14, 2011 at 7:28 PM, Mike Burger mbur...@bubbanfriends.org wrote: On Wed, Jul 13, 2011 at 9:10 PM, James B. Byrne byrn...@harte-lyne.ca wrote: On Wed Jul 13 15:03:40 EDT 2011, Michael Best mbest at pendragon.org wrote: Like this: MAILTO=testaddr at harte-lyne.ca 30 2 * * * echo this should be mailed That sets MAILTO for the entire crontab does it not? I want to set MAILTO differently for specific crontab entries. Is that possible? How is it done? Or do I have to pipe stuff to /usr/bin/mail explicitly? Easy: MAILTO=root 30 2 * * * echo this should be mailed to root MAILTO=james@harte.x.x 30 4 * * * echo this should be mailed to James MAILTO=bob 30 5 * * * echo this should be mailed to Bob MAILTO= 30 6 * * * echo this should be mailed to no-one Why not simply do one of the following: 30 6 * * * /path/to/job 21 | mail -s job name output user at domain .com Or Within the script that runs the job, send the output of the to a file, then cat the contents of the file through mail -s job name output user at domain.com -- Mike Burger http://www.bubbanfriends.org I suppose it depends on which option you prefer :) But, I think if your crontab has many lines then it's a bit easier to use the method I suggested. For example: MAILTO=root line1 line2 line3 . . line9 MAILTO=support-dept line10 line11 line12 .. .. line13 line14 MAILTO= line15 line16 etc -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 6.0 text-mode installer broken?
On Tue, Jul 12, 2011 at 11:36 AM, Andy Holt centos-l...@orgdotuk.org.uk wrote: Someone posted that you can use VNC to install CentOS 6. and this has WHAT to do with low ram installs? It means you get to do a graphical install, which you otherwise can't if you don't have enough RAM i.e. less than 652MB. hth Andy ___ Surely Russ would have known that, if he followed the link to the RHEL6 documentation on THIS VERY MATTER. Russ, there's no need to be rude to someone who's trying to help. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6 Server has no GUI
On Tue, Jul 12, 2011 at 6:31 PM, Keith Roberts ke...@karsites.net wrote: On Tue, 12 Jul 2011, Lamar Owen wrote: To: CentOS mailing list centos@centos.org From: Lamar Owen lo...@pari.edu Subject: Re: [CentOS] Centos 6 Server has no GUI On Tuesday, July 12, 2011 08:44:00 AM Keith Roberts wrote: How can Linux _not_ have run levels. I thought that was a central part of the design of Linux? No, it's a central part of the design of the old System V Init. C6, SL6, and upstream EL6 use upstart instead of SysVInit. EL7, if the direction of Fedora is any indication, won't have classic runlevels, but will use systemd. The Linux kernel knows nothing of runlevels; runlevels are userspace and have been since SysVInit was first used (and even before). All the kernel cares about is that it hands execution off to a userspace process that then takes care of further boot. That process can be /bin/sh or anything else, the kernel doesn't care. OK, thanks for pointing that out Lamar. So I take it we can still choose which services we want running at boot time on C6? Keith - Yes, look here: http://upstart.ubuntu.com/ -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6 Server has no GUI
On Mon, Jul 11, 2011 at 5:40 PM, Scott Robbins scot...@nyc.rr.com wrote: On Mon, Jul 11, 2011 at 11:33:10PM +0800, Emmanuel Noobadmin wrote: On 7/11/11, Keith Beeby k.be...@albion.co.uk wrote: Hi, So first daft question with Centos 6 (someone had to be first!) I've setup Centos 6 as a Server but as with Centos 5 it used to boot into the GUI but v6 doesn't do this, startx etc doesn't seem to work to launch the GUI If I'm not mistaken, the Server option does not include the GUI so you'll have to install the GUI group manually as others have suggested. If I'm not mistaken, (not making fun of Emmanuel, just the same caveat), neither server nor web server have a GUI by default. IMLTHO (less than humble) this is something they should have done a long time ago, (though I would like to see either flux or openbox available as alternative--on the other hand, that's purely personal preference, and can be safely ignored--just, if I do, for whatever reason, want a GUI on a server, I'd much prefer a *box (or other--twm is available actually, but I don't like it), I'd like something light. -- I have to agree with Scott. A lightweight server option is a long-awaited-and-much-deserved-feature but it would be nice if we could still get a very lightweight X - even if it doesn't run automatically. I often need to use X for odd stuff which only works on X - like using Firefox to check if a specific feature on a website, hosted on the server works fine. Or like using gparted to get the extra features which fdisk doesn't offer. Just a thought... -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Celebrating Centos 6.0 Day World-wide
On Sat, Jul 9, 2011 at 10:59 PM, Always Learning cen...@u6.u22.net wrote: Hoi Rudi, CentOS is great as a server OS, but it won't replace our accountant's Windows 7 desktop - the amount of technical compatibilies issues we're going to sit with is just not worth it. Don't use a jack hammer to drive in a nail :) Centos 5.5 works well for my non-computer literate friends who use a computer for Facebook and web browsing. I never said CentOS won't work great for this. But, try and convert someone who uses Pastel Accounting, Quickbooks, Lightroom, AutoCAD, Adobe Premier, etc, to name but a few. The point I'm making is that it won't suit everyone's needs. And yes, I know where you're coming from. Many years ago my mother used to work on a DOS based application in the hospital and when it came to converting their system to Windows 98 (which then used a mouse) it took many months to try and get her to use a mouse. My mother-in-law is not computer literate at all. She has a PC to facebook and play games on. And now matter how many times I've tried to show her how to cut an MP3 CD, she simply can't remember todo it. Now for me to convert her desktop to Linux would be an absolute nightmare. I remember some years ago I converted a guy who used to study MCSE with me (yes, I know.) to Linux. He absolutely LOVED it. I gave him a Suse Live CD - this was about 8 or 9 years ago I think, and then he decided to install it on his PC. Big mistake. He didn't know that to format your Hard Drive means it will completely wipe everything from it. So he lost all his data. We had some words and he wanted to sue me for ruining his business. And yes, the mistake I made, was that I didn't sit next to him 24/7 and spoon fed him. I thought he would be somewhat technically competent to understand what he's going todo with his PC. BUT, he wanted to save money on Microsoft licensing. P.S. Have you every tried to convert a MAC user, specifically a 3D graphic designer to anything other than MAC? Different people have different needs and different applications (and Operating Systems) exist for that exact reason :) I run Windows 7 on on both my laptop and my Desktop cause we have some business applications which won't run on Linux. Yet some of the developers in the office use either Debian, Slackware or CentOS. All our servers though run CentOS, FreeBSD and Solaris. Even my media player and 12TB NAS (my wife is a photographer) at home runs CentOS. I use Centos 5.6 on servers, desktops, home server/desktop, laptop, notebook/netbook and would never willingly return to ghastly M$ Windoze. -- With best regards, Paul. England, EU. 1 June 2010 Exclusively Centos Gnome. Liberated from M$ Windoze. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where can I download centos 6
On Sun, Jul 10, 2011 at 3:14 PM, Patrick Lists centos-l...@puzzled.xs4all.nl wrote: On 07/10/2011 03:10 PM, Hal Davison wrote: What innovations will Cent 6 bring to the party in your opinion? http://www.redhat.com/about/news/prarchive/2010/new-standard.html Regards, Patrick It's interesting how that article was released in November 2010 .. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Celebrating Centos 6.0 Day World-wide
On Sat, Jul 9, 2011 at 8:04 PM, Always Learning cen...@u6.u22.net wrote: May I suggest that all us very grateful users of Centos make 6 copies of Centos 6.0 (either i386 or/and X64) and hand then out to friends, colleagues or strangers (unknown members of the public) who might be interested in trying Centos ? This is a great and noble idea but you're going to cause unwanted problems for some people. And often times those people would rather pay the 100pounds extra for Windows than have to try and actually become computer fundies. My mother, father, in-laws, some friends and many of our client could benefit from the cost saving that Linux has to offer. But they won't change over, no matter you convinsing your story about computer liberty is, cause Linux simmply cannot replave Windows. Not for them at least. Linux doesn't work for everyone. CentOS is great as a server OS, but it won't replace our accountant's Windows 7 desktop - the amount of technical compatibilies issues we're going to sit with is just not worth it. Don't use a jack hammer to drive in a nail :) A modification of this idea could be to distribute Live versions of Centos that can run without altering a computer's hard disk(s). Wasn't, or isn't there a Live distro already? -- With best regards, Paul. England, EU. 1 June 2010 Exclusively Centos Gnome. Liberated from M$ Windoze. ___ -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how to enable Flow Control on CentOS?
Hi, I have an interesting situation with one of our switches. It's a D-Link DGS-3100, 24 port 10/100/1000 Layer 2 Managed switch with some CentOS servers connected to it. On many of the servers I need to disable Flow Control on the switch's ports otherwise the CentOS server's doesn't connect to the switch. i.e. the Switch indicates that the LAN cable is unplugged and CentOS can simply not connect to any host on the LAN. As soon as I disable Flow Control, CentOS breaks. Does anyone know why this would happen, or how / if I can enable Flow Control in CentOS as well? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how to get data from syslog for a specific date range?
Hi all, Can someone please tell me, or point me in the right direction ( I have googled, with little luck) on how to get data from /var/logs/messages (and other log files) for a specified fe days (i.e 19 - 30 June 2011) ? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to enable Flow Control on CentOS?
On Thu, Jul 7, 2011 at 2:31 PM, Digimer li...@alteeve.com wrote: On 07/07/2011 07:46 AM, Rudi Ahlers wrote: Hi, I have an interesting situation with one of our switches. It's a D-Link DGS-3100, 24 port 10/100/1000 Layer 2 Managed switch with some CentOS servers connected to it. On many of the servers I need to disable Flow Control on the switch's ports otherwise the CentOS server's doesn't connect to the switch. i.e. the Switch indicates that the LAN cable is unplugged and CentOS can simply not connect to any host on the LAN. As soon as I disable Flow Control, CentOS breaks. Does anyone know why this would happen, or how / if I can enable Flow Control in CentOS as well? I've got many CentOS machines connected to a few DGS-3100 (24 and 48 port versions) and I've not seen this problem before. I can't suggest what might be the problem, but I am going to guess that it's server side. Yes, I figured that much, but I don't know what to look for. Some of the servers are Intel and other are SuperMicro, all using onboard NIC's. The Dell Windows servers connected to the same switch doesn't have this issue though -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to enable Flow Control on CentOS?
On Thu, Jul 7, 2011 at 3:22 PM, R - elists list...@abbacomm.net wrote: rudi when migrating some rackmount HP servers running Centos4 from hard coded 100 meg fdx to auto gigE that we had to 1) remove this from our ifcfg-ethX files ETHTOOL_OPTS=speed 100 duplex full autoneg off I don't see those options listed: root@zaxen01:[~]$ cat /etc/sysconfig/network-scripts/ifcfg-eth0 # Intel Corporation 82566DC Gigabit Network Connection DEVICE=eth0 BOOTPROTO=none ONBOOT=yes HWADDR=00:1c:c0:75:19:ee TYPE=Ethernet IPADDR=196.34.x.x NETMASK=255.255.255.224 GATEWAY=196.34.x.x 2) proper CAT6 wiring already done :) 3) plug into the copper gigE switchport already done :) 4) reboot tried that already using Cisco though... I can't change a switch just for this. The other (Dell + Windows) servers on the exact same switch doesn't give me this problem. did not find a decent plug n play solution i.e., did not waste a lot of time looking for solutions other than the obvious cisco and centos config or network down and up interface commands - rh ___ -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to get data from syslog for a specific date range?
On Thu, Jul 7, 2011 at 3:28 PM, Owen Beckley ow...@foxriver.com wrote: -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Rudi Ahlers Sent: Thursday, July 07, 2011 7:04 AM To: CentOS mailing list Subject: [CentOS] how to get data from syslog for a specific date range? Hi all, Can someone please tell me, or point me in the right direction ( I have googled, with little luck) on how to get data from /var/logs/messages (and other log files) for a specified fe days (i.e 19 - 30 June 2011) ? Give this a try: grep -E '^Jun (19|2[0-9]|30) ' /var/log/messages And to explain the argument following -E see: man grep -- Owen Beckley ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanx Owen, that's probably what I needed, but it seems there's something wrong with the logs on this server since it only has this month's data in /var/log/messages and /var/log/message.1 - 4 doesn't have much either. I'll have to investigate this first to see what's up. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to enable Flow Control on CentOS?
On Thu, Jul 7, 2011 at 3:43 PM, Nicolas Thierry-Mieg nicolas.thierry-m...@imag.fr wrote: Rudi Ahlers wrote: On Thu, Jul 7, 2011 at 3:22 PM, R - elistslist...@abbacomm.net wrote: rudi when migrating some rackmount HP servers running Centos4 from hard coded 100 meg fdx to auto gigE that we had to 1) remove this from our ifcfg-ethX files ETHTOOL_OPTS=speed 100 duplex full autoneg off I don't see those options listed: root@zaxen01:[~]$ cat /etc/sysconfig/network-scripts/ifcfg-eth0 you're not looking in the right place, look in TFM: /usr/share/doc/initscripts-*/sysconfig.txt ___ Interesting. It *almost* looks like a plain text (i.e. instructions / manual) file to me and there's 2 lines with the option you specified: ETHTOOL_OPTS=... Any device-specific options supported by ethtool. For example, if you wanted to force 100Mb full duplex: ETHTOOL_OPTS=speed 100 duplex full autoneg off The NIC is connected @ 1GB, as per the switch interface, but I can't seem to verify it on CentOS directly, and I would prefer not to change this file since it shows as 100MB (if that 2nd line with ETHTOOL_OPTS is an actual configuration option, and not just comment) but there's no mention of Flow Control in that file. I don't know what impact this could have, if any at all. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS on the HP MicroServer
On Wed, Jul 6, 2011 at 5:48 AM, John R Pierce pie...@hogranch.com wrote: indeed, it ships with the 4 drive trays. Note they are not advertised as hot swap, I believe this is probably because there is no SES (enclosure services) and Windows in particular is not happy about hotswapping disks without one. afaik, if you go to the trouble of using the mdadm commands on linux to take the drive offline before removing it, you should be able to 'warm swap' as there's nothing in the hardware preventing it, and the SATA connector is inherently electrically safe for hotswap. -- john r pierce N 37, W 122 santa cruz ca mid-left coast ___ I thought this was particularly dependent on the BIOS to support AHCI, and not necessarily so much on SES alone? Many desktop grade motherboard can hot swap a SATA HDD and they don't have SES, only AHCI in the BIOS. Or is HP just trying to stay on the safe side with not advertising hot swap, incase someone with Windows has issues with it? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Power-outage
On Wed, Jul 6, 2011 at 6:24 PM, John R Pierce pie...@hogranch.com wrote: On 07/06/11 5:44 AM, Lamar Owen wrote: Sure; we have a couple of small units like that for some solar-powered things we're doing here; however, the max I've seen for those plug-in type small ATX/ITX power supplies has been in the ~200W range (the specific one you linked to is only 160W), and my reply was specifically directed at the idea that lower than 48 VDC input was limited in power handling.. PowerStream has a 500W 12VDC input unit, which is quite a bit more power than I've seen in the mini-ITX plugin supply categories. 500 watts at 12VDC is 41 amps. that requires some hefty wiring, and if you have to run it any distances, either the wire is ridiculously heavy (and expensive) or you suffer from voltage drop under load. 500 watts at 120V is only 4 amps, and can easily be run 100s of feet through simple lamp cord sized wiring. -- john r pierce N 37, W 122 santa cruz ca mid-left coast ___ Which is why it's generally better to use 48V for these kinds of applications :) -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] HP Smart Array B110i SATA RAID Controller Driver
On Wed, Jul 6, 2011 at 8:10 PM, Kaushal Shriyan kaushalshri...@gmail.com wrote: Hi Simon, Thanks for the explanation. Please help me understand why do Hardware Vendors provide onboard storage raid controller chipset on the motherboard (fakeraid if its a software raid.). Is it a marketing term for selling servers. Since it does not add value at all strictly speaking due to the fact that the OS is unable to determine the Logical drives. Awaiting your earnest reply. Regards Kaushal ___ Frankly, that's something you'd need to ask the vendors directly. Everyone else can just give you speculation, or their idea of what they think the real reason behind this is. That said, many onboard RAID chipsets work fine with various Linux distributions, and all of them work fine with Windows. In the case of Windows you also need to install the drivers while installing Windows. And this is cause the OS developers, whether Linux, UNIX or Windows don't always have the drivers readily available to include in the installation files but instead rely on the hardware developers to supply the drivers on disk, or on the internet. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
