[CentOS] Silly logrotate question
Ok, I have Googled this and either I am not asking the right way or I just
can't see what's in front of me (sorry)...
We have log files called app.2011-10-119.log (with the date changing every
day). The log is created by the application each day at midnight.
I have logrotate set to rotate files ending in .log at 4am, with
copytruncate on by default.
If I list the files I see all the old app.2011-10-X.log files with a 0
file size.
If I turn off copytruncate, the current days log file will be removed
everyday at 4am.
How can I satisfy both the need to remove yesterday's log file while keeping
the current day?
Here is the logrotate file:
/var/log/app/*.log {
daily
rotate 10
compress
missingok
notifempty
create 0644 user user
}
I added notifempty to keep the old empty log files from being compressed...
Thanks,
John
John Kennedy
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Re: [CentOS] CentOS 6: hostname and timezone
On Tue, Oct 4, 2011 at 15:22, John Kennedy skeb...@gmail.com wrote: For changing the hostname without restart use the hostname command: hostname newhost.domain.com To keep the new hostname between restarts edit /etc/sysconfig/network, and change the hostname there. Also its a good idea to check /etc/hosts, it can contain the old hostname, change/delete it. John Kennedy On Tue, Oct 4, 2011 at 15:18, Alexander Farber alexander.far...@gmail.com wrote: Hello, I've purchased a new dedicated CentOS 6.0 / 64 bit server and have 2 minor problems please: 1) The hostname is reported as CentOS-60-64-minimal at CLI - eventhough I've edited /etc/hosts and changed the 2nd line: 127.0.0.1 localhost 176.9.123.123 preferans Sorry for the top post...Hit send before I looked and changed it...Damn web interface... John ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6: hostname and timezone
For changing the hostname without restart use the hostname command: hostname newhost.domain.com To keep the new hostname between restarts edit /etc/sysconfig/network, and change the hostname there. Also its a good idea to check /etc/hosts, it can contain the old hostname, change/delete it. John Kennedy On Tue, Oct 4, 2011 at 15:18, Alexander Farber alexander.far...@gmail.comwrote: Hello, I've purchased a new dedicated CentOS 6.0 / 64 bit server and have 2 minor problems please: 1) The hostname is reported as CentOS-60-64-minimal at CLI - eventhough I've edited /etc/hosts and changed the 2nd line: 127.0.0.1 localhost 176.9.123.123 preferans 2) Why is /etc/localtime a regular file? Should I maybe rm /etc/localtime ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime Why isn't it done by the CentOS 6.0 install? Thank you Alex ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where are the CentOS 6 security updates?
2 things to keep in mind... 1) the httpd dos vuln does not even have a Red Hat patch yet, only a work around. 2) the people who work on CentOS are VOLUNTEERS. They do not get paid which is a large part of why CentOS is free. If you need up to the minute updates, maybe you should be using RHEL. John On 03/09/11 16:00, Vesselin Kolev wrote: Today is September 3, 2011. There are no _any_ CentOS 6 security updates for a month (during August). And at the moment, the usage of CentOS 6 as a server platform is irresponsible risk (just for example - there is an uncovered httpd DoS, the same is for Samba, e.t.c). And more and more people start to realize that there is practically no (security) support in CentOS 6. Just look at centos-annou...@centos.org - the only supported version of CentOS now is ... 4, which is almost at its end of life!!! How is it possible? How can I advise people to use CentOS in their business and make donations? Maybe I should ask them to pray for updates or so? Do You realise how critical is the situation now? Maybe you should think on what the words Enterprise mean. Or maybe You should think how to get back the lost confidence, because too many people now think that CentOS is no more enterprise distribution, not at all! ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Converting to Raid1
On Tue, Nov 30, 2010 at 11:59, Matt lm7...@gmail.com wrote: Have a CentOS 4.x 32 bit server running on a single 500M SATA drive. What is easiest way to convert too RAID 1 on it? Anyone have a link? Would be open to hardware or software just do not want to reinstall the entire mess. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Why would you mirror a single disk? You need to get another 500Gb hard drive to mirror with. Once you get the second drive, you need to make sure LVM is installed. I think you then need to add your partitions as physical drives and partition the new drive to match your existing one. Add the new drive partitions as physical drives and pair them up. How difficult it is depends on your current set up. John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Novell sale news?
On Mon, Nov 22, 2010 at 13:26, Les Mikesell lesmikes...@gmail.com wrote: On 11/22/2010 12:14 PM, Digimer wrote: Is anyone following the news of the Novell sale and some mysterious 'intellectual property assets' that were transferred to a holding company controlled by Microsoft? I saw that, and can't help but wonder if we're in for another SCO. =/ SCO didn't get off the ground since it was ruled that they didn't actually own the IP in question and Novell did. And they ran out of money for the legal process. This could be a very different game. -- Les Mikesell lesmikes...@gmail.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos My guess (and I REALLY hope I am right) is that the IP in question is related to NetWare and eDirectory. Both products (started out to be)/are better than MS products, not Linux/SUSE stuff. -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] good shell script examples?
On Wed, Nov 17, 2010 at 15:08, Brunner, Brian T. bbrun...@gai-tronics.comwrote: -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Kill Script Sent: Monday, November 15, 2010 9:06 PM To: CentOS mailing list Subject: Re: [CentOS] good shell script examples? I wrote a simple one a few years back: http://www.happyhacker.org/gtmhh/basha.shtml Is there an alternate location for this? My corp's websense blocks this site for some reason. They probably only want sad hackers... John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ssh prompting for password
A few things to look for: Make sure .ssh and authorized_keys files are permissioned to 700 and 600 respectively. If they are wide open then ssh will skip them. Check /var/log/secure on both machines. That may give you a clue ssh with -vvv (or just -v) and see if you get errors. I just had the same thing and my problem was .ssh permissions. Hope this helps. John On Tue, Nov 16, 2010 at 16:05, bluethundr bluethu...@gmail.com wrote: hello list I have a network mounted home directory shared between all hosts on my network: [bluethu...@lcent03:~]#df -h FilesystemSize Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 140G 4.4G 128G 4% / /dev/sda1 99M 35M 60M 37% /boot tmpfs 1.6G 0 1.6G 0% /dev/shm nas.summitnjhome.com:/mnt/nas 903G 265G 566G 32% /mnt/nas nas2.summitnjhome.com:/mnt/store 1.4T 187G 1.1T 15% /mnt/store nas2.summitnjhome.com:/mnt/home 903G 47G 784G 6% /home none 1.6G 136K 1.6G 1% /var/lib/xenstored So therefore my RSA key should already be in my authorized_keys on any host. However logging into the virtual network, I always get prompted for a password. just for the heck of it, I scp'd the key over again to one of the virtual hosts: [bluethu...@lcent03:~]#scp .ssh/id_rsa.pub virt1:~ bluethu...@virt1's password: id_rsa.pub 100% 381 0.4KB/s 00:00 ssh'd in: [bluethu...@lcent03:~]#ssh virt1 bluethu...@virt1's password: Last login: Tue Nov 16 15:57:24 2010 from 192.168.1.46 Searched for the key on the host I just ssh'd into: [bluethu...@virtcent01:~]#grep -f id_rsa.pub .ssh/authorized_keys ssh-rsa B3NzaC1yc2EBI-FAKE-DATA-dgjIWxnyplIYKE5IQw9FY2+IVsYw== As you can see, it's already there.. I then checked the modes on authorized_keys: [bluethu...@virtcent01:~]#ls -l .ssh/authorized_keys -rw--- 1 1001 1002 1597 Nov 15 12:02 .ssh/authorized_keys And checked that I was using the same shared network mounted home directory from the machine I just ssh'd in from: [bluethu...@virtcent01:~]#df -h FilesystemSize Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 9.1G 1.8G 6.9G 21% / /dev/xvda1 99M 20M 75M 21% /boot tmpfs 129M 0 129M 0% /dev/shm nas.summitnjhome.com:/mnt/nas 903G 265G 566G 32% /mnt/nas nas2.summitnjhome.com:/mnt/store 1.4T 187G 1.1T 15% /mnt/store nas2.summitnjhome.com:/mnt/home 903G 47G 784G 6% /home [bluethu...@virtcent01:~]# Considering that this key is internal network only and doesn't have a passphrase set (it does not traverse internet boundaries) why on earth am I being prompted for a password whenever I ssh into this machine? thanks! -- Here's my RSA Public key: gpg --keyserver pgp.mit.edu --recv-keys 5A4873A9 Share and enjoy!! ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ssh prompting for password
On Tue, Nov 16, 2010 at 16:31, m.r...@5-cent.us wrote: bluethundr wrote: hello list I have a network mounted home directory shared between all hosts on my network: snip So therefore my RSA key should already be in my authorized_keys on any host. However logging into the virtual network, I always get prompted for a password. just for the heck of it, I scp'd the key over again to one of the virtual hosts: snip Considering that this key is internal network only and doesn't have a passphrase set (it does not traverse internet boundaries) why on earth am I being prompted for a password whenever I ssh into this machine? Do you have PermitRootLogin without-password in /etc/ssh/sshd_config? mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I would think that would just cause a failed login and not ask for a password then let him in. From reading, it looks like he can SSH, just not without the password... John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] SSH keys question
All, I have 3 servers. All 3 are CentOS 5.5. All 3 have identical /etc/ssh/sshd_config files. I used ssh-keygen (with no arguments) to generate keys with no password. I then added all 3 id_rsa.pub keys to the authorized_keys file. With this set up, I should be able to ssh between all 3 boxes without needing a password. The problem is that one of the servers keeps asking for a password even with the keys set up. servera -- serverb No password serverb -- servera No password servera -- serverc Password serverc -- servera No password serverb -- serverc Password serverc -- serverb No password If they are all identical from an ssh standpoint (at least the authorized_keys, /etc/sshd_config, and UID for the user on all 3 hosts), why will serverc not play nicely with the other 2 Is there something else I should be checking? Thanks, John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] SSH keys question [RESOLVED]
On Mon, Nov 15, 2010 at 13:45, Paul Heinlein heinl...@madboa.com wrote: On Mon, 15 Nov 2010, cliff here wrote: You should check the perms on the dirs, ssh will not allow it use the keys if they are too permissive. So I would check starting at /home This is the most likely cause; I'd check there too. If not, 1. Ensure the file hash is the same (e.g., no extraneous whitespace in the middle of the key) 2. sshd is usually pretty good about writing errors to syslog. -- Paul Heinlein heinl...@madboa.com http://www.madboa.com/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Found it... In /var/log/secure I got Authentication refused: bad ownership or modes for directory /home/zema/.ssh I had checked the file, not the directory... Thanks all... John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] good shell script examples?
On Mon, Nov 15, 2010 at 13:54, Max Hetrick maxhetr...@verizon.net wrote: On 11/15/2010 01:47 PM, Kill Script wrote: I am looking for a beginner guide to shell scripting simple tasks on CentOS (e.g. ssh'ing into a server / router / switch, checking for certain things, then exiting and going to the next IP). Does anyone have any suggestions on where to look? (I'm relatively new to bash) The book Learning the bash Shell helped me out a lot. http://oreilly.com/catalog/9781565923478 Regards, Max To answer your question, I have liked UNIX Shells By Example by Ellie Quigley (4th edition) it has good examples with explanations. The Linux Command line and Shell Scripting Bible is a good teaching tool. A new edition is due out next year but the current edition is still useful. As to what you appear to want to do, if you require interactive logins (i.e. ssh keys not set up for password-less logins) then bash is not the best choice. For this you would want to use either Python (with pyexpect module) or the Expect scripting language (Expect is an extension of the TCL scripting language. John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Fwd: ntp help
On Thu, Nov 11, 2010 at 12:35, Robert Moskowitz r...@htt-consult.com wrote: On 11/11/2010 11:20 AM, tony.chamberl...@lemko.com wrote: Hello I am trying to sync via NTP locally (since I have no Internet access). None of the NTP stuff I read on the net seems to work right. I mean it works fine setting up a client going to something like 0.pool.ntp.org but when I want to make my LInux box a server, and I do an ntpdate to it from another machine, it says no suitable server found. I have tried every possible combination of restrict, broadcast, multicast. Followed directions in the examples but nothing works. Also iptables-save shows no iptables stuff set at all, so there is no firewall blocking it. Maybe I could ask my question and someone could tell me how to configure? There are 4 machines: 1. 10.5.1.50 2. 10.5.0.20 / 192.168.1.100 3. 10.6.1.50 4. 10.6.0.20 / 192.168.1.101 The 10.5s cannot reach the 10.6s (except roundaboutly through the 192 network). The two 192 machines are connected directly to each other. You can get back and forth between them I want to set it up so that, and it doesn't matter which way), one of the 191.168.1.X machines NTP syncs to the other, and then the 10.5.1.50 syncs to 10.5.0.20 and the 10.6.1.20 syncs to 10.6.0.20. How do I set the ntp.conf files? Remember there is no external internet on any of the machines, and the 10.5 machines cannot reach the 10.6 machines and v.v. (except the 10.X.0.20 machines can reach each other through the 192 network). Also I am not allowed to use the 192 machines as routers for the 10.X.1.50 machines. I have 3 systems here that are my internal NTP servers. They are set up to go out and get time, and my clients all look to them for time. The files you need to work with are: For /etc/ntp.conf you need to control how your local clients interact with the server, like: restrict 192.168.128.0 mask 255.255.255.0 nomodify notrap And protect your server from outside influence with: server 0.rhel.pool.ntp.org burst iburst restrict 0.rhel.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery In /etc/ntp/ntpservers you list your outside sources (or inside for the clients) eg: clock.redhat.com clock2.redhat.com /etc/sysconfig/ntpd controls updating your hardware clock: # Set to 'yes' to sync hw clock after successful ntpdate SYNC_HWCLOCK=yes Anyway for your clients to get time, you have to allow udp/tcp port 123 in your firewall and set up /etc/ntp.conf. (this message is a little scattered, as I am suppose to be listing to this presentation on comment resolution on the 802.15.4g ballot. boring). ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos To fit this in a bit with your set up. Have your 192.168.1.100 box be your main time server. Have .101 be secondary, getting time from .100. Then each of the respective 10.5/6 boxes can get their time from their attached server. Robert's info can be modified for this... John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] RHEL 6 Officially Released
When will CentOS 6 be released??? (Just kidding...Just wanted to let you all know that RHEL6 has been released...And yes, I know that most of you all know...) John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RHEL 6 Officially Released
Last time there was only one build queue, so if 5.6 and 6 come out at the same time, they will have to choose which one gets attention first. CentOS doesn't have the multi-million dollar infrastructure to support multiple simultaneous releases. I expect that 5.6 will get the first priority, if for no other reason than it was out first, and thus probably already being worked on. Can't wait for CentOS 6.0 though! I thought 5.6 was only a Beta. RHEL 6 is fully released. John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Possible to reboot a system after kickstart installation without pressing a key?
On 10/31/2010 07:07 AM, Sean Carolan wrote: Use the 'reboot' option in your kickstart. Isn't this the default anyway? I will try to specify it explicitly and see how it works... ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos The default is to ask you for a reboot. Since a newly built system is most vulnerable, many people do not want to reboot unless they are there to finish the configuration John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] No last command in VIM?
Is there an alias hanging around that is redirecting you? John On Thu, Oct 21, 2010 at 12:36, Scott Robbins scot...@nyc.rr.com wrote: On Thu, Oct 21, 2010 at 06:19:54PM +0200, Dotan Cohen wrote: Although I made sure that vim-enhanced.i386 is installed, pressing : then upArrow does not show me the last command that I've typed. Might I still be using vim-minimal erroneously? How to fix that? I don't see any mention of this in google or the past few months of fine archives. One possible guess, but it's a guess only and I don't have high hopes for it Is there possibly a /bin/vi which takes precedence over /usr/bin/vim? (Or is the command vim-enhanced?) -- Scott Robbins PGP keyID EB3467D6 ( 1B48 077D 66F6 9DB0 FDC2 A409 FA54 EB34 67D6 ) gpg --keyserver pgp.mit.edu --recv-keys EB3467D6 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to do repetetive command in shell
for i in `ls -d /opt`
do
cp /opt/${i}/test/ /backup/${i}
done
On Thu, Oct 21, 2010 at 14:45, Roland RoLaNd r_o_l_a_...@hotmail.comwrote:
Dear all,
i'm writing a certain script which does a specific task in a repetitive
manner, i'm going to give a similar script with the same concept hope you
could advise me to a better way:
USER1=roland
USER2=dany
USER3=kevin
cp -r /opt/$USER1/test /backup/$USER1
cp -r /opt/$USER2/test /backup/$USER2
such a command would be repeated 832 times (this is just an example)
so instead of copying the above line 832 times and appending that user's
number in each $USER
is there a way to do it in a smarter way ?
thanks,
--Rolad
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Re: [CentOS] how to do repetetive command in shell
Not quite right...
for i in `ls -d /opt | cut -d/ -f2`
do
cp /opt/${i}/test/ /backup/${i}
done
Takes out the /opt/ from my first try...
John
On Thu, Oct 21, 2010 at 14:51, John Kennedy skeb...@gmail.com wrote:
for i in `ls -d /opt`
do
cp /opt/${i}/test/ /backup/${i}
done
On Thu, Oct 21, 2010 at 14:45, Roland RoLaNd r_o_l_a_...@hotmail.comwrote:
Dear all,
i'm writing a certain script which does a specific task in a repetitive
manner, i'm going to give a similar script with the same concept hope you
could advise me to a better way:
USER1=roland
USER2=dany
USER3=kevin
cp -r /opt/$USER1/test /backup/$USER1
cp -r /opt/$USER2/test /backup/$USER2
such a command would be repeated 832 times (this is just an example)
so instead of copying the above line 832 times and appending that user's
number in each $USER
is there a way to do it in a smarter way ?
thanks,
--Rolad
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Re: [CentOS] how to do repetetive command in shell
Damn...I will get this right...Need more sleep...
for i in `ls -d /opt/* | cut -d/ -f3`
do
cp /opt/${i}/test/ /backup/${i}
done
I KNOW this one will work...If not, I quit!!!
John
On Thu, Oct 21, 2010 at 14:55, John Kennedy skeb...@gmail.com wrote:
Not quite right...
for i in `ls -d /opt | cut -d/ -f2`
do
cp /opt/${i}/test/ /backup/${i}
done
Takes out the /opt/ from my first try...
John
On Thu, Oct 21, 2010 at 14:51, John Kennedy skeb...@gmail.com wrote:
for i in `ls -d /opt`
do
cp /opt/${i}/test/ /backup/${i}
done
On Thu, Oct 21, 2010 at 14:45, Roland RoLaNd r_o_l_a_...@hotmail.comwrote:
Dear all,
i'm writing a certain script which does a specific task in a repetitive
manner, i'm going to give a similar script with the same concept hope you
could advise me to a better way:
USER1=roland
USER2=dany
USER3=kevin
cp -r /opt/$USER1/test /backup/$USER1
cp -r /opt/$USER2/test /backup/$USER2
such a command would be repeated 832 times (this is just an example)
so instead of copying the above line 832 times and appending that user's
number in each $USER
is there a way to do it in a smarter way ?
thanks,
--Rolad
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[CentOS] Disk Problem???
Every few hours we get the following in /var/log/messages:
Oct 19 20:56:20 wltracp1a kernel: mptscsi: ioc0: bus reset: SUCCESS
(sc=010190c56080)
Oct 19 20:56:20 wltracp1a kernel: mptscsi: ioc0: attempting task abort!
(sc=010190c56080)
Oct 19 20:56:20 wltracp1a kernel: scsi4 : destination target 2, lun 0
Oct 19 20:56:20 wltracp1a kernel: command = Test Unit Ready 00 00 00
00 00
Oct 19 20:56:20 wltracp1a kernel: mptbase: ioc0: IOCStatus=8048
LogInfo=3114 Originator={PL}, Code={IO Executed}, SubCode(0x)
Oct 19 20:56:20 wltracp1a kernel: mptscsi: ioc0: task abort: SUCCESS
(sc=010190c56080)
Oct 19 20:56:20 wltracp1a kernel: mptscsi: ioc0: Attempting host reset!
(sc=010190c56080)
Oct 19 20:56:20 wltracp1a kernel: mptbase: Initiating ioc0 recovery
Oct 19 20:56:20 wltracp1a kernel: mptscsi: ioc0: attempting task abort!
(sc=010190c56080)
Oct 19 20:56:20 wltracp1a kernel: scsi4 : destination target 2, lun 0
Oct 19 20:56:20 wltracp1a kernel: command = Test Unit Ready 00 00 00
00 00
Oct 19 20:56:20 wltracp1a kernel: mptbase: ioc0: IOCStatus=8048
LogInfo=3114 Originator={PL}, Code={IO Executed}, SubCode(0x)
Oct 19 20:56:20 wltracp1a kernel: mptscsi: ioc0: task abort: SUCCESS
(sc=010190c56080)
Oct 19 20:56:21 wltracp1a kernel: scsi: Device offlined - not ready after
error recovery: host 4 channel 0 id 2 lun 0
We are running CentOS 4.6 on Sun x4600 hardware with a connection to a
NetApp filer. The box has 3 X 146 GB hard drives. We know that one of the
drives (set in LSI as a failed Hot Spare) has failed but that is in slot 0
and should not be an issue here.
Any ideas on what is breaking?
Thanks,
John
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Re: [CentOS] Determine next UID number
On Wed, Oct 13, 2010 at 17:16, Spiro Harvey sp...@knossos.net.nz wrote:
John Kennedy skeb...@gmail.com wrote:
This also does not tell me how useradd knows that on this system at
this time the highest UID assigned to a user is 20015.
From the source's mouth (this is from useradd.c in the shadow-utils
package):
/*
* find_new_uid - find the next available UID
*
* find_new_uid() locates the next highest unused UID in the password
* file, or checks the given user ID against the existing ones for
* uniqueness.
*/
static void find_new_uid (void)
{
const struct passwd *pwd;
uid_t uid_min, uid_max;
uid_min = getdef_unum (UID_MIN, 1000);
uid_max = getdef_unum (UID_MAX, 6);
/*
* Start with some UID value if the user didn't provide us with
* one already.
*/
if (!uflg)
user_id = uid_min;
/*
* Search the entire password file, either looking for this
* UID (if the user specified one with -u) or looking for the
* largest unused value.
*/
#ifdef NO_GETPWENT
pw_rewind ();
while ((pwd = pw_next ())) {
#else /* using getpwent() we can check against
NIS users etc. */
setpwent ();
while ((pwd = getpwent ())) {
#endif
if (strcmp (user_name, pwd-pw_name) == 0) {
fprintf (stderr, _(%s: name %s is not unique\n),
Prog, user_name);
#ifdef WITH_AUDIT
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, adding
user,
user_name, user_id, 0);
#endif
exit (E_NAME_IN_USE);
}
if (uflg user_id == pwd-pw_uid) {
fprintf (stderr, _(%s: UID %u is not unique\n),
Prog, (unsigned int) user_id);
#ifdef WITH_AUDIT
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, adding
user,
user_name, user_id, 0);
#endif
exit (E_UID_IN_USE);
}
if (!uflg pwd-pw_uid = user_id) {
if (pwd-pw_uid uid_max)
continue;
user_id = pwd-pw_uid + 1;
}
}
/*
* If a user with UID equal to UID_MAX exists, the above algorithm
* will give us UID_MAX+1 even if not unique. Search for the first
* free UID starting with UID_MIN (it's O(n*n) but can be avoided
* by not having users with UID equal to UID_MAX). --marekm
*/
if (!uflg user_id == uid_max + 1) {
for (user_id = uid_min; user_id uid_max; user_id++) {
#ifdef NO_GETPWENT
pw_rewind ();
while ((pwd = pw_next ())
pwd-pw_uid != user_id);
if (!pwd)
break;
#else
if (!getpwuid (user_id))
break;
#endif
}
if (user_id == uid_max) {
fprintf (stderr, _(%s: can't get unique UID\n),
Prog);
fail_exit (E_UID_IN_USE);
}
}
}
--
Spiro Harvey Knossos Networks Ltd
021-295-1923 www.knossos.net.nz
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This looks like what I am talking about. Interesting to see that the program
literally does what the code above does (as much as I can tell. I am not a
coder)
Thanks Spiro.
John
--
John Kennedy
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[CentOS] Determine next UID number
When I used Solaris years and years ago there was a command that would be able to tell you the next available non-system UID number for the system (can't remember what it is now, I have slept since then...). Is there an equivalent in CentOS? Thanks, John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Determine next UID number
On Wed, Oct 13, 2010 at 16:09, Joseph L. Casale jcas...@activenetwerx.comwrote: Is there an equivalent in CentOS? cat /etc/passwd |cut -d : -f 3 |sort -n ;) I am more looking at what the system thinks is the next UID. Does the useradd command use this when it assigns the next UID? John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Determine next UID number
On Wed, Oct 13, 2010 at 16:40, Bowie Bailey bowie_bai...@buc.com wrote: On 10/13/2010 4:22 PM, Terry Polzin wrote: On Wed, 2010-10-13 at 20:09 +, Joseph L. Casale wrote: Is there an equivalent in CentOS? cat /etc/passwd |cut -d : -f 3 |sort -n NEXTUID=`expr $LASTUID + 1` ;) LASTUID=`cat /etc/passwd |grep -v nologin|cut -d : -f 3 |sort -n | tail -1`; NEXTUID=`expr $LASTUID + 1`; echo $NEXTUID That assumes the highest UID number has a login shell... -- Bowie This also does not tell me how useradd knows that on this system at this time the highest UID assigned to a user is 20015. It will assign 20016 to the next user even though some dim bulb gave a use a UID of 4294967294 (how the hell that user can log in with a UID out of range is beyond me unless it gets truncated)... I have been able to use things like these 2 examples (cat /etc/passwd | cut -d: -f3 | sort -n | tail -2 | head -1 in this case) but I want to get the next UID from the system not by parsing /etc/passwd John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] OpenOffice or LibreOffice?
On Mon, Oct 4, 2010 at 12:20, Mark mhullr...@gmail.com wrote: Given that the Document Foundation has now split away from Oracle to continue the development of an independent office suite, do we have any idea which was CentOS and Red Hat are planning to go in this area - OpenOffice or LibreOffice? I know that LibreOffice is not production ready yet - they only have their first beta available, but it's just a matter of (likely a short) time before the split becomes a release. Thanks, Mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I would guess RedHat (and by default CentOS) will stay with OpenOffice for a while to see what a) Oracle are going to do with it b) How many people sing LibreOffice's praises Once it hits beta, I will install it to see how it goes. The way Oracle is acting towards Open Source I will likely stay with LibreOffice and also start learning PosgreSQL just so I have no Oracle products (in much the same way I have no M$ products (in my personal life))... John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, Sep 17, 2010 at 11:47, m.r...@5-cent.us wrote: Ah, no. I wrote 30 scripts around '91-'92 to take datafiles from 30 sources and reformat them, to feed to the C program I'd written with embedded sql, in place of the d/b's sqlloader (*bleah*). Then, 11 years ago, I wrote a validation program for data that was being loaded by another program that I didn't want to change; the data had been exported from ArcInfo, and had to go into our Oracle d/b. Really simple to do in awk - just so much of it, and no, perl would have offered no improved/shorter way to do it, and yes, I do know perl - in '04, for example, I rewrote a call routing and billing system from perl (written by my then-manager, who'd never studied programming, can you say spaghetti?) into reasonable perl. Actually, I just wrote a scraper in perl, using HTML::Parser. Anyway, the point of that was to demonstrate that I know both, and awk is better, IMO, for some jobs. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos It's all about picking the right tool for the job. Python is good for some things, perl for others, awk for still different things... It is the beauty of Linux... John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Update to base release
Hello All, We have some machines running CentOS 4 Update 4 (4.4). We want to update these boxes to the stock CentOS 4 Update 8 (4.8). We have the 4.8 iso images. Is it possible to use up2date and have it use the 4.8 mounted iso images on a remote (install) server as the repository? The ISO's are accessible through http. These servers are remote with no CD/DVD option to upgrade that way. I have tried to Google this but can't seem to quite hit what I need. I found one that shows up2date-config GUI setup but I do not have X running on this server and do not want to screw up the config with the CLI version of it. We need to go to stock versions to match our production RHEL 4.8 machines. Thanks, John -- John Kennedy ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Upgrading from 4.4 to 4.7
Hello all, For (system) certification purposes, we have to upgrade our 4.4 machines to 4.7. In the past I usually have just reinstalled machines to save the (perceived) headaches of upgrading. That is not an option in this case. Are there any pitfalls to watch out for when upgrading? Is it even possible to go up 3 revisions? Thanks, John -- Did you know that it costs forty thousand dollars a year to house each prisoner?...I don't think we should give free room and board to criminals. I think they should have to run twelve hours a day on a treadmill and generate electricity. And if they don't want to run, they can rest in the chair that's hooked up to the generator. -George Carlin ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Upgrading from 4.4 to 4.7
Only going to 4.7 because the required app is not certified for 4.8 (In the
RHEL world which is what we are basing this on). 4.7 is as high as they will
go. I know I will be doing this again in a month's time when they have 4.8
certified...
I just do as I am told...To an extent...
Thanks,
John
On Thu, Jun 24, 2010 at 9:01 AM, Robert Heller hel...@deepsoft.com wrote:
At Thu, 24 Jun 2010 07:53:47 -0400 CentOS mailing list centos@centos.org
wrote:
Hello all,
For (system) certification purposes, we have to upgrade our 4.4 machines
to
4.7.
In the past I usually have just reinstalled machines to save the
(perceived)
headaches of upgrading. That is not an option in this case.
Are there any pitfalls to watch out for when upgrading? Is it even
possible
to go up 3 revisions?
Thanks,
John
Why to 4.7? The current point release for CentOS 4 is 4.8. Going from
4.4 to 4.8 is trivial ('yum update' then 'shutdown -r now').
--
Robert Heller -- Get the Deepwoods Software FireFox Toolbar!
Deepwoods Software-- Linux Installation and Administration
http://www.deepsoft.com/ -- Web Hosting, with CGI and Database
hel...@deepsoft.com -- Contract Programming: C/C++, Tcl/Tk
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--
Did you know that it costs forty thousand dollars a year to house each
prisoner?...I don't think we should give free room and board to criminals. I
think they should have to run twelve hours a day on a treadmill and generate
electricity. And if they don't want to run, they can rest in the chair
that's hooked up to the generator.
-George Carlin
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Re: [CentOS] NFS - Permission Denied
Try turning off root_squash in your /etc/exports file... Default NFS server behavior is to prevent root on client machines from having privileged access to exported files. Servers do this by mapping the root user to some unprivileged user (usually the user nobody) on the server side. This is known as *root squashing.* One way to test, can you add files/dirs as a non root user? John On Thu, Jun 17, 2010 at 12:47 PM, James Corteciano ja...@linux-source.orgwrote: Hi Boris, [r...@server]# ls -ld /nfs/iso drwxrwx--- 2 root apache 4096 Jun 18 00:46 /nfs/iso Regards, James On Fri, Jun 18, 2010 at 12:36 AM, Boris Epstein borepst...@gmail.comwrote: On Thu, Jun 17, 2010 at 12:17 PM, James Corteciano ja...@linux-source.org wrote: Hi All, This is the settings of my NFS server (192.168.10.55) /etc/exports: /nfs/iso 192.168.10.0/255.255.255.0(rw,sync)http://192.168.10.0/255.255.255.0%28rw,sync%29 From the remote host, I mount it correctly. But when I write/create files/directory inside the mounted nfs directory (from /nfs/test), it will give me Permission Denied. [r...@remote]# mount -t nfs 192.168.10.55:/nfs/iso /nfs/test [r...@remote]# mkdir /nfs/test/testing mkdir: cannot create directory `testing': Permission denied Hope anyone could help me to fix this. Thank you. Regards, James ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos James, On the server, who owns /nfs/iso? What are the permissions on that directory? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Did you know that it costs forty thousand dollars a year to house each prisoner?...I don't think we should give free room and board to criminals. I think they should have to run twelve hours a day on a treadmill and generate electricity. And if they don't want to run, they can rest in the chair that's hooked up to the generator. -George Carlin ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] help!
On 03/24/2010 04:48 AM, Roland RoLaNd wrote: hello, i've just wrote the following : more ./*.csv | grep -i XXX | echo Dear XXX, This email is for informative purposes. Your total number of hours for the week of `date` is: `cut -d, -f2` hours Kindly note that the average weekly working hours is : 40. | /usr/sbin/sendEmail -t m...@domain.com -u Test email- disregard it -f otherm...@subdomain.com -s smtp.domain.com:25 this looks in a csv file that exists in the same directory for XX and outputs the field right next to it as you notice from : `cut -d, -f2` It's working pretty fine for just one user, but i have to do the same for 432 person. and its obviously not as professional as it should be due to the following reasons: 1. i have to fill the name for each person in place of XXX as well as their m...@domain.com 2. the date command gives the hour as well which is a bit annoying can anyone guide me on how to proceed? as you notice im a bit of a newbie with bash and im trying my best to improve my one liners/scripts How about: for i in *.csv do HOURS=`cat $i | cut -d, -f2` USER=`cat $i | cut -d, -fuser name field` DATE=`date plus formatting options` echo Dear $USER, This email...for week of $DATE is: $HOURS ... done The text portions are bits you will need to change for your environment. You can also put this in a file and script it instead of having to type it out every time. To be more specific we would need to know if there is just one .csv file or one file per user and the format of each line. John ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] SSH Remote Execution - su?
On Wednesday 03 March 2010 16:20:21 Tim Nelson wrote: Greetings All- I'm about to embark on some remote management testing and need a way to login to a remote system running CentOS 4.x/5.x via SSH, su to root (using a password), then execute a command. I currently login to the boxes using key based SSH like this: ssh -i ~/remote_key ad...@$remoteip Then, I SU to root. However, if I try to do this automatically like this: ssh -i ~/remote_key ad...@$remoteip 'su -l' I'm getting: standard in must be a tty So, how am I able to remote login using SSH, su to root, then execute a command as root? All comments and suggestions welcome. Thanks! --Tim ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos You could use an expect script to ssh to the box then su to root with the password. You can have the script ask for the password so it is not hard coded or used on the command line. Expect can allow you to interact with the shell once you have su'd. I have used a combination of bash and expect scripting to get stats from multiple boxes and it works a treat. If you need more details/help, let me know. John ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Building a custom install CD
On Mon, Jun 8, 2009 at 11:13 PM, Fred Moyer f...@redhotpenguin.com wrote: Greetings, I am looking for resources on how to build my own Centos install CD for a preselected package set that I want to install. I think Red Hat may have had this functionality at some point but it has been a while since I have needed to do this. I found this on how to build my own kernel - http://wiki.centos.org/HowTos/BuildingKernelModules - which I will need to exercise as well, but I want to build my own .iso that I can run a kickstart or similar mechanism from. Thanks in advance. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos http://nootech.wordpress.com/2007/12/11/build-a-custom-centos-5-install-cd/ http://people.redhat.com/rkeech/custom-distro.txt I used these 2 sites to help me. It did take quite a bit of trial and error to get it right. Do not forget to edit comps.xml to take out the packages that you do not want and add your new packages. (Why CentOS installs bluetooth packages by default is well beyond me...) Hope this helps John -- Did you know that it costs forty thousand dollars a year to house each prisoner?...I don't think we should give free room and board to criminals. I think they should have to run twelve hours a day on a treadmill and generate electricity. And if they don't want to run, they can rest in the chair that's hooked up to the generator. -George Carlin ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Auto-installing security updates?
On Tuesday 19 May 2009 16:11:35 Anne Wilson wrote: I've been asked to think about setting up an installation for a recently- widowed man. His needs are small - mail, Internet, on-line banking, basically - but his wife dealt with all of it on her laptop and he feels very insecure. It seems to me that CentOS would be perfect for him except for the need to keep it securely patched. I'm wondering if it's possible to auto-install security updates - for that matter, with so small a set of applications perhaps auto-installing every update would be good enough. Maybe this could be done with a script run under cron.daily, so that anacron picks it up? I'd be glad of any advice. Anne As much as I like CentOS, I tend to agree with the other posts. I don't think it is the right distro for non techies. I set up my in-laws with Linux Mint (running KDE, of course) and they could even handle installing the codecs and other non OSS stuff. Mint is a nice distro based on Ubuntu. John ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kickstart question
On Monday 04 May 2009 18:28:16 Jerry Geis wrote: Hi all, My kickstart section for packages is %packages @base-x @dialup @gnome-desktop @base @development-libs @core snip I do not have package @mysql in the list - yet after install rpm -qa | grep -i mysql reports mysql loaded. how can I stop mysql from loading from anaconda? Thanks, this is centos 5.3 x86_64 Jerry ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos If you look through comps.xml file in the install disks /repodata/ directory it will list all the packages that are mandatory, default, and optional for each package group. If you are remastering your install disks then you can edit the file to match your needs. Hope this helps, John ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Errors using custom install disk
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 (Sorry if this is a dupe. Sent originally from unregistered email address) All, I am trying to make a custom install CD for CentOS 5.2. I am building the iso in a VirtualBox image and testing the iso in another VirtualBox image so I don't keep wasting CD's. I have gotten to where all the package dependencies are met and now I get the following error on boot: An error occurred unmounting the CD. Please make sure you're not accessing /mnt/source from the shell on tty2 and then click OK to retry This scrolls rapidly up the screen (doing text install) and there is no OK button. I have seen that there is a bug about this dated 2006 at: https://bugzilla.redhat.com/show_bug.cgi?id=206352 But that was closed in November 2007 so it SHOULD be fixed in the iso I am trying. I also read in a forum that the CD drive was going into some sort of sleep mode which the install couldn't overcome. The solution for this person was to Ctrl Alt F2 and in the new session do an ls on /mnt/sort every few seconds. Since this needs to be as unattended an install as possible, that wouldn't work even if I could get to the second console. Any ideas? Thanks, John -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkmuQpcACgkQh55XlAYb/QjjgQCbBLsl31LK9OdB+cTR1iDCLSnU bS8AoJpbOW6s1vwMJsS9oSYzI+2hrcEj =GVZY -END PGP SIGNATURE- ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
