Re: [CentOS] Enabling X on headless server via network

2010-07-25 Thread Chan Chung Hang Christopher
Dotan Cohen wrote: On Sun, Jul 25, 2010 at 19:35, Stephen Harris li...@spuddy.org wrote: Which shows it's working... but painfully slowly. Bandwidth and especially latency is killing you. Other than getting a new ISP, is there anything that I can do about the latency? I can smoothly run

Re: [CentOS] Desktop Supercomputer

2010-07-17 Thread Chan Chung Hang Christopher
Rajagopal Swaminathan wrote: Greetings, Thanks Les for your reply. (I dont top-post normally, but this was an emergency) Emergency? Sorry, but your posts are leading me to think that you have lost it. Have you looked at Ubuntu's setup? I don't think it deals with GPU's but it might be

Re: [CentOS] Redundant LAN routing possible?

2010-07-11 Thread Chan Chung Hang Christopher
Emmanuel Noobadmin wrote: Thanks for the suggestion, I'll read up more about them. The bond0 and just works sounds simple which is a Good Thing! The problem was the last time I tried to cross connect multiple switches, everything just died so there must be something a bit more involved? :D

Re: [CentOS] Redundant LAN routing possible?

2010-07-11 Thread Chan Chung Hang Christopher
Idea being that the dumb switches are used solely for local data transfer between up to X number of App servers and storage nodes. The managed switch then handles only external communications as well as any firewalling. Oh you have dumb switches in the mix? Not going to work as Gordon has

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
Christopher Chan wrote: On Thursday, July 08, 2010 05:09 PM, Kahlil Hodgson wrote: On 07/08/2010 05:08 PM, Christopher Chan wrote: Hmmm ... which bond mode are you using? Why mode 4 of course. Ouch. Never used that mode. Huh? Like why? It's the recommended mode unless the switch does not

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
Hakan Koseoglu wrote: HiChristopher, On 08/07/10 10:25, Christopher Chan wrote: Why mode 4 of course. Huh? Like why? It's the recommended mode unless the switch does not suppoprt it or the boards don't. I never realised this is the recommended mode. Do you have pointers where it is

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
JohnS wrote: On Thu, 2010-07-08 at 07:51 -0500, Les Mikesell wrote: I think some bridge or vlan scenarios require promiscuous mode (and the corresponding disabling of hardware acceleration). Maybe the real issue is that something accidentally disabled it and you now only work when

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
Les Mikesell wrote: Chan Chung Hang Christopher wrote: Christopher Chan wrote: On Thursday, July 08, 2010 05:09 PM, Kahlil Hodgson wrote: On 07/08/2010 05:08 PM, Christopher Chan wrote: Hmmm ... which bond mode are you using? Why mode 4 of course. Ouch. Never used that mode. Huh? Like why

Re: [CentOS] Networking just stopped working

2010-07-06 Thread Chan Chung Hang Christopher
Christopher Chan wrote: And now the thing is working again... It's not working again. Running tcpdump -i vlan seems to trigger something to get the network working again but as soon as I stop tcpdump...nada, zip, zilch. Any ideas? I see no errors in the logs whether of the switch or the box,

Re: [CentOS] Networking just stopped working

2010-07-06 Thread Chan Chung Hang Christopher
Les Mikesell wrote: Chan Chung Hang Christopher wrote: Christopher Chan wrote: And now the thing is working again... It's not working again. Running tcpdump -i vlan seems to trigger something to get the network working again but as soon as I stop tcpdump...nada, zip, zilch. Any ideas? I

Re: [CentOS] DNS or firewall problem

2010-07-06 Thread Chan Chung Hang Christopher
Are you running a proxy for http? It would be rather surprising that internal machines can access the Internet without forwarding turned on otherwise. When you say internal machines cannot access your server, are they connecting to it via the local interface's ip or the Internet ip?

Re: [CentOS] CentOS MD RAID 1 on Openfiler iSCSI

2010-06-29 Thread Chan Chung Hang Christopher
Emmanuel Noobadmin wrote: On 6/29/10, Christopher Chan christopher.c...@bradbury.edu.hk wrote: raid1/iscsi if you have a single host accessing the data or gluster if you have more than one host accessing the data... This is starting to look really complicated with NCP Storage units on zfs -

Re: [CentOS] CentOS MD RAID 1 on Openfiler iSCSI

2010-06-29 Thread Chan Chung Hang Christopher
Emmanuel Noobadmin wrote: On 6/29/10, Chan Chung Hang Christopher christopher.c...@bradbury.edu.hk wrote: gluster don't care about underlying filesystem...it don't support acl yet for a reason Could you elaborate on that? Although at the moment I don't appear to have a need for ACL

Re: [CentOS] LSI software raid with centos 5.4

2010-05-25 Thread Chan Chung Hang Christopher
CList wrote: I have been trying to install CentOS 5.4 on a Intel SR1530SHS, Intel S3200SH mainboard.. It has a 3 x 1TB sata hotswap drives with LSI software raid onboard. fake-raid alert! I had configured the LSI to have Sata0 and Sata1 with raid 1 and the third drive as a hotspare drive.

Re: [CentOS] LSI software raid with centos 5.4

2010-05-24 Thread Chan Chung Hang Christopher
CList wrote: Hi, I have been trying to install CentOS 5.4 on a Intel SR1530SHS, Intel S3200SH mainboard.. It has a 3 x 1TB sata hotswap drives with LSI software raid onboard. fake-raid alert! I had configured the LSI to have Sata0 and Sata1 with raid 1 and the third drive as a

Re: [CentOS] Benchmark Disk IO

2010-05-06 Thread Chan Chung Hang Christopher
Les Mikesell wrote: On 5/5/2010 12:00 PM, Karanbir Singh wrote: Try to run the same IO operations as your production server is running. Bonnie++ could be good application for benchmarking. Also run some parallel rsync, rm, find, etc proccesses. I am with John Pierce on this one, role and app

Re: [CentOS] [SOLVED] Re: Installing a CentOS based distro with Raid driver - Citrix XenServer

2010-05-05 Thread Chan Chung Hang Christopher
Georghy wrote: Tru Huynh a écrit : On Tue, May 04, 2010 at 03:03:00PM +0200, Georghy wrote: (1)Download that driver : http://downloadcenter.intel.com/Detail_Desc.aspx?agr=YProdId=3117DwnldID=18570lang=fra from the intel support web site You should have started your installation

Re: [CentOS] [SOLVED] Re: Installing a CentOS based distro with Raid driver - Citrix XenServer

2010-05-05 Thread Chan Chung Hang Christopher
Georghy wrote: Chan Chung Hang Christopher a écrit : Georghy wrote: Tru Huynh a écrit : On Tue, May 04, 2010 at 03:03:00PM +0200, Georghy wrote: (1)Download that driver : http://downloadcenter.intel.com/Detail_Desc.aspx?agr=YProdId=3117DwnldID=18570lang=fra from

Re: [CentOS] [SOLVED] Re: Installing a CentOS based distro with Raid driver - Citrix XenServer

2010-05-05 Thread Chan Chung Hang Christopher
Georghy wrote: Chan Chung Hang Christopher a écrit : xe dd (assuming you have a floppy [is usb supported?] disk with the drivers) A floppy isn't enough because the driver is about 2.7Mb so I use a USB Stick. It should be the same with a Floppy. It seems that the system doesn't find

Re: [CentOS] OT: Caching synchronous writes

2010-04-23 Thread Chan Chung Hang Christopher
Jure Pečar wrote: Ray Van Dolson wrote: I think what you want is a proper storage array with mirrored write cache. When ext3 came into widespread use, a popular method to cache frequent fsyncs was to run it in a full data journaling mode, with external journal on a separate disk. This

Re: [CentOS] CentOS5 and samba

2010-04-16 Thread Chan Chung Hang Christopher
Brian Sr wrote: On Fri, 2010-04-16 at 14:29 +0100, lheck...@users.sourceforge.net wrote: Here's a question: are you using your old configuration files? You might want to compare the default from the install with the old ones - there may be deprecated or defunct or invalid options. Have

Re: [CentOS] RAID 5 setup?

2010-03-27 Thread Chan Chung Hang Christopher
Benjamin Franz wrote: Robert Heller wrote: I suspect that this is a simular case to what I did: I have a server with 4 drives. I have several (small) RAID1 partitions (/boot, /, /usr, /var, etc.) with 4 mirrors and one large RAID5 with three partitions and a hot spare (a LVM volumn group,

Re: [CentOS] RAID 5 setup?

2010-03-26 Thread Chan Chung Hang Christopher
Benjamin Franz wrote: Ross Walker wrote: No, not yet, but I always recommend setting up your data arrays manually so your intimately familiar with how they are constructed and the mdadm command usage is fresh in your head. Did you know with Neil's raid10 implementation you can store 3

Re: [CentOS] MySQL max clustering package?

2010-03-17 Thread Chan Chung Hang Christopher
JohnS wrote: On Tue, 2010-03-16 at 23:19 -0500, Neil Aggarwal wrote: Mysql by itself has built in clustering though there can be significant limitations in it depending on your requirements. I agree. The built in cluster has too many limitations to be useful, but MySQL master-master

Re: [CentOS] Motherboards for HPC applications

2010-03-09 Thread Chan Chung Hang Christopher
Eduardo Grosclaude wrote: On Tue, Mar 9, 2010 at 12:49 AM, Christopher Chan christopher.c...@bradbury.edu.hk wrote: On Tuesday, March 09, 2010 12:34 AM, Eduardo Grosclaude wrote: Hello, Can somebody recommend CentOS-OK, dual socket motherboards for compute elements? A quick look up at Intel

Re: [CentOS] Exim VS Postfix (no flame wars please)

2010-03-09 Thread Chan Chung Hang Christopher
Rudi Ahlers wrote: Can anyone, who has used both Postfix Exim please share some experience with me? Which of these 2 did you prefer to use, and why? I have not used exim but I know someone who swears by it. It is highly configurable and had stuff like sender based routing before postfix did.

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Susan Day wrote: On Fri, Feb 26, 2010 at 8:29 AM, Eero Volotinen eero.voloti...@iki.fiwrote: 2010/2/26 Susan Day suzieprogram...@gmail.com: Hi; The following message appears to have been sent, but in fact never does reach their destination: [root qmail-send]# tail current

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
B.J. McClure wrote: On Fri, 2010-02-26 at 08:57 -0400, Susan Day wrote: snip With respect to Kai's suggestion I find a qmail list, I'm sorry to say there don't appear to be ANY discussion lists for ANY email servers that are active. I'm desperate to get this working. TIA, Suzie How

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
postfix has a very active mailing list -- the originator and primary developer, Wietse Venema,responds to posts quite often, as well as many other postfix experts. http://www.postfix.org/lists.html Sorry, but this has NOT been my experience. I just tried that list __last_week__ and

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Chan Chung Hang Christopher wrote: postfix has a very active mailing list -- the originator and primary developer, Wietse Venema,responds to posts quite often, as well as many other postfix experts. http://www.postfix.org/lists.html Sorry, but this has NOT been my experience. I just tried

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Kai Schaetzl wrote: Susan Day wrote on Fri, 26 Feb 2010 09:25:38 -0400: Sorry, but this has NOT been my experience. I just tried that list __last_week__ and __no__ responses, no activity, either. Maybe that's because of the nature of your questions. I get the impression that you are

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Kai Schaetzl wrote: Chan Chung Hang Christopher wrote on Fri, 26 Feb 2010 22:01:28 +0800: Programmers always have a hard time picking up on the system admin side of things. Still they should be able to find the best avenue for their questions, or not? Fair question. But we don't have

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Brian Mathis wrote: On Fri, Feb 26, 2010 at 10:13 AM, Dominik Zyla gavro...@gavroche.pl wrote: And please, stop send mails with html encoding. -- Dominik Zyla No, do not stop sending emails with HTML encoding. Welcome to the second decade of the 21st century. We may not have flying

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Mihai T. Lazarescu wrote: On Fri, Feb 26, 2010 at 10:34:34AM -0400, Susan Day wrote: On Fri, Feb 26, 2010 at 9:51 AM, Simon Billis si...@houxou.com wrote: Why? That is a good question - I guess that google's email system thinks you're sending them spam. If you want your mail to be

Re: [CentOS] tcpserver on port 25

2010-02-24 Thread Chan Chung Hang Christopher
Eero Volotinen wrote: 2010/2/24 Susan Day suzieprogram...@gmail.com: Hi; [r...@13gems beno]# netstat -ltnup Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp0 0 0.0.0.0:3306

Re: [CentOS] tcpserver on port 25

2010-02-24 Thread Chan Chung Hang Christopher
Susan, is qmail-send running? tcpserver is used to run qmail-smtpd to accept emails but qmail-send does the actual queue processing and delivery. 27755 ?S 0:00 multilog t s10 n20 /var/log/qmail/qmail-send Susan, why do you say the email server is broken? 'tail -f

Re: [CentOS] Server HD failed and I think I am hosed

2010-02-19 Thread Chan Chung Hang Christopher
m.r...@5-cent.us wrote: Also, what would have caused this all of the sudden? This box has been running fine for months. Well, do you think that computer hardware lives forever? They don't? /me stares at 486dx with a working floppy drive and working floppies from the eighties and early

Re: [CentOS] CentOS 5.4 x86_64 authenticating against AD (Server 2008r2)

2010-02-11 Thread Chan Chung Hang Christopher
Craig White wrote: On Wed, 2010-02-10 at 09:50 -0500, Ross Walker wrote: On Feb 10, 2010, at 8:11 AM, Chan Chung Hang Christopher christopher.c...@bradbury.edu.hk wrote: If you have hundreds or thousands of users and hundreds of groups, well good luck. It is extremely hard to automate

Re: [CentOS] CentOS 5.4 x86_64 authenticating against AD (Server 2008r2)

2010-02-10 Thread Chan Chung Hang Christopher
If you have hundreds or thousands of users and hundreds of groups, well good luck. It is extremely hard to automate assigning these uids/ gids and making sure they don't collide with each other or other unix systems and doing it by hand is a torture reserved for the ninth circle of

Re: [CentOS] CentOS 5.4 x86_64 authenticating against AD (Server 2008r2)

2010-02-05 Thread Chan Chung Hang Christopher
Wbinfo -u wbinfo -g do indeed work for me however getent passwd or getent group returns no AD users or groups. I have winbind entries in nsswitch for both the passwd group entries. Josepeh, I will try a newer RPM from a different repository and see if that resolves my issues. Did my

Re: [CentOS] Virtualization software to install Windows as guest on CentOS 5 as host ?

2010-02-04 Thread Chan Chung Hang Christopher
Sergej Kandyla wrote: Christopher Chan wrote: On Thursday, February 04, 2010 03:48 PM, Hadi Motamedi wrote: Dear All I need to install Windows as guest on my CentOS 5 as host . Can you please give me the link to download the requierd rpm package for this purpose ? Thank you yum

Re: [CentOS] Centos/Linux Disk Caching, might be OT in some ways

2010-01-27 Thread Chan Chung Hang Christopher
Ah, well #1 on his list then is to figure out what he is running! LOL, I know it sounds quite noobish, coming across like I've no idea what DBMS it is running on. The system currently runs on MySQL but part of my update requirement was to decouple the DBMS so that we can make an eventual

Re: [CentOS] The directory that I am trying to clean up is huge

2010-01-25 Thread Chan Chung Hang Christopher
Anas Alnaffar wrote: I tried to run this command find -name *.access* -mtime +2 -exec rm {} \; Should have been: find ./ -name \*.access\* -mtime +2 -exec rm -f {} \; ___ CentOS mailing list CentOS@centos.org

Re: [CentOS] 8-15 TB storage: any recommendations?

2010-01-13 Thread Chan Chung Hang Christopher
On the machine where I had the problem I had to run memtest86 more than a day to finally catch it. Then after replacing the RAM and fsck'ing the volume, I still had mysterious problems about once a month until I realized that the disks are accessed alternately and the fsck pass

Re: [CentOS] 8-15 TB storage: any recommendations?

2010-01-12 Thread Chan Chung Hang Christopher
Karanbir Singh wrote: On 12/01/10 00:02, Christopher Chan wrote: problems mostly centered around management and performance issues. the world is littered with stores of cciss fail Really? Man, I have been given this spanking new HP DL370 G6 and running Centos 5.4 on it... I've got a

Re: [CentOS] 8-15 TB storage: any recommendations?

2010-01-12 Thread Chan Chung Hang Christopher
Which is why I specifically said 'performance wise' as respects 3ware. I don't remember anything bad about 3ware stability wise or monitoring wise. Is that supposed to be a joke? 3ware has certainly had their fair share of stability problems (drive time-outs, bbu-problems, inconsistent

Re: [CentOS] 8-15 TB storage: any recommendations?

2010-01-12 Thread Chan Chung Hang Christopher
Benjamin Donnachie wrote: 2010/1/12 Chan Chung Hang Christopher christopher.c...@bradbury.edu.hk: Eeek! That thing will be hosting the school's vle. Looks like I better memorize the after hours password for HP support. I have had lots[1] of problems lately with DIMMs becoming defective

Re: [CentOS] 8-15 TB storage: any recommendations?

2010-01-12 Thread Chan Chung Hang Christopher
adapter too but that is of no consequence with storage right now. Regards Per Qvindesland At Tisdag, 12-01-2010 on 11:57 Chan Chung Hang Christopher wrote: Karanbir Singh wrote: On 12/01/10 00:02, Christopher Chan wrote: problems mostly centered around management and performance issues

Re: [CentOS] 8-15 TB storage: any recommendations?

2010-01-07 Thread Chan Chung Hang Christopher
John Doe wrote: From: Boris Epstein borepst...@gmail.com This is not directly related to CentOS but still: we are trying to set up some storage servers to run under Linux - most likely CentOS. The storage volume would be in the range specified: 8-15 TB. Any recommendations as far as

Re: [CentOS] Find reason for heavy load

2009-12-31 Thread Chan Chung Hang Christopher
Look at the first two columns. What column have higher numbers? If r, you're CPU-bound. If b, you're I/O bound. procs ---memory-- ---swap-- -io --system-- -cpu-- r b swpd free buff cache si sobibo in cs us sy id wa st 8 1

Re: [CentOS] Find reason for heavy load

2009-12-31 Thread Chan Chung Hang Christopher
Christoph Maser wrote: Am Donnerstag, den 31.12.2009, 12:34 +0100 schrieb Chan Chung Hang Christopher: Look at the first two columns. What column have higher numbers? If r, you're CPU-bound. If b, you're I/O bound. procs ---memory-- ---swap-- -io --system

Re: [CentOS] Find reason for heavy load

2009-12-31 Thread Chan Chung Hang Christopher
Noob Centos Admin wrote: Hi, Yes, these figures indicate that you are fairly close to being cpu bound. What kind of filtering are you doing? If you have any connection tracking/state related rules set, you will need to be using a fair amount of cpu. Initially, when the load start going

Re: [CentOS] Optimizing CentOS for gigabit firewall

2009-12-20 Thread Chan Chung Hang Christopher
Peter Serwe wrote: I'll second damn near everything nate said, and hopefully add a tidbit or two. If you're new to BSD, you may want to consider the pfsense project in the aforementioned active-active configuration. It gives you a nice, intuitive gui to manage your failover firewalls, if

Re: [CentOS] Using (was: Announcing) Gluster Storage Platform

2009-12-16 Thread Chan Chung Hang Christopher
Alan McKay wrote: On Tue, Dec 15, 2009 at 7:48 PM, Christopher Chan christopher.c...@bradbury.edu.hk wrote: A cluster filesystem OK, but you've just given me a circular definition. When you do not need/want a cluster file system and again ... Okay, a cluster/distributed file system

Re: [CentOS] LVM, usb drives, Active Directory

2009-12-16 Thread Chan Chung Hang Christopher
Steve Thompson wrote: On Tue, 15 Dec 2009, Scott Ehrlich wrote: I have a client with a handful of USB drives connected to a CentOS box. I am charged with binding the USB drives together into a single LVM for a cheap storage data pool (10 x 1 TB usb drives = 10 TB cheap storage in a single

Re: [CentOS] LVM, usb drives, Active Directory

2009-12-16 Thread Chan Chung Hang Christopher
Scott Ehrlich wrote: I have a client with a handful of USB drives connected to a CentOS box. I am charged with binding the USB drives together into a single LVM for a cheap storage data pool (10 x 1 TB usb drives = 10 TB cheap storage in a single mount point). How about eSATA? Surely an

Re: [CentOS] LVM, usb drives, Active Directory

2009-12-16 Thread Chan Chung Hang Christopher
Steve Thompson wrote: On Wed, 16 Dec 2009, Chan Chung Hang Christopher wrote: Steve Thompson wrote: On Tue, 15 Dec 2009, Scott Ehrlich wrote: I have a client with a handful of USB drives connected to a CentOS box. I am charged with binding the USB drives together into a single LVM

Re: [CentOS] XFS and LVM2 (possibly in the scenario of snapshots)

2009-12-10 Thread Chan Chung Hang Christopher
Timo Schoeler wrote: [off list] Thanks for your eMail, Ross. So, reading all the stuff here I'm really concerned about moving all our data to such a system. The reason we're moving is mainly, but not only the longisch fsck UFS (FreeBSD) needs after a crash. XFS seemed to me to fit

Re: [CentOS] XFS and LVM2 (possibly in the scenario of snapshots)

2009-12-10 Thread Chan Chung Hang Christopher
Mathieu Baudier wrote: LVM like md raid and drbd is a layered block device and If you turn the wire caches off on the HDs then there is no problem, but HDs aren't designed to perform to spec with the write cache disabled they expect important data is written with FUA access (forced unit

Re: [CentOS] Is ext4 safe for a production server?

2009-12-08 Thread Chan Chung Hang Christopher
Timo Schoeler wrote: thus Christopher Chan spake: Ian Forde wrote: On Dec 7, 2009, at 10:30 AM, Florin Andrei flo...@andrei.myip.org wrote: John R Pierce wrote: I've always avoided XFS because A) it wsan't supported natively in RHEL anyways, and B) I've

Re: [CentOS] Is ext4 safe for a production server?

2009-12-08 Thread Chan Chung Hang Christopher
Timo Schoeler wrote: thus Chan Chung Hang Christopher spake: Timo Schoeler wrote: thus Christopher Chan spake: Ian Forde wrote: On Dec 7, 2009, at 10:30 AM, Florin Andrei flo...@andrei.myip.org wrote: John R Pierce wrote

Re: [CentOS] Is ext4 safe for a production server?

2009-12-05 Thread Chan Chung Hang Christopher
Miguel Medalha wrote: I am about to install a new server running CentOS 5.4. The server will contain pretty critical data that we can't afford to corrupt. I would like to benefit from the extra speed and features of a ext4 filesystem but I don't have any experience with it. Is there some

Re: [CentOS] Is ext4 safe for a production server?

2009-12-05 Thread Chan Chung Hang Christopher
Jure Pečar wrote: On Sat, 05 Dec 2009 10:48:56 -0800 John R Pierce pie...@hogranch.com wrote: Timo Schoeler wrote: For enterprise environments my favorite FS is XFS, YMMV, though. I've always avoided XFS because A) it wsan't supported natively in RHEL anyways, and B)

Re: [CentOS] Is ext4 safe for a production server?

2009-12-05 Thread Chan Chung Hang Christopher
John R Pierce wrote: Timo Schoeler wrote: For enterprise environments my favorite FS is XFS, YMMV, though. I've always avoided XFS because A) it wsan't supported natively in RHEL anyways, and B) I've heard far too many stories about catastrophic loss problems and day long

Re: [CentOS] recommend benchmarking SW

2009-11-03 Thread Chan Chung Hang Christopher
Alan McKay wrote: Hey folks, We've got some new hardware and are trying to figure out what best to do with it. Either run CentOS right on the bare metal, or virtualize, or several combination options. Mainly looking at : - CentOS on bare metal - CentOS on ESXi 4.0 with local disk -

Re: [CentOS] RAID 10 on Install?

2009-10-31 Thread Chan Chung Hang Christopher
ML wrote: People went back and forth on the list saying that if a hardware controller was out of the budget right now RAID 10 would be the best solution. That is raid1+0. raid10, under md, is something else different from raid1+0. It seems that the installer wont let you create two

Re: [CentOS] RAID 10 on Install?

2009-10-31 Thread Chan Chung Hang Christopher
Neil Aggarwal wrote: How can I RAID 10 on install? Does anyone know if this approach: http://www.howtoforge.com/install-ubuntu-with-software-raid-10 Will work for CentOS? Never tried the Centos LiveCD so I cannot say but manually creating the raid1 arrays and then striping them

Re: [CentOS] To all of the group

2009-10-22 Thread Chan Chung Hang Christopher
James Bensley wrote: Wait a minute, didn't someone just try and offer their help to the community; Where in their email did they mention cpanel? Sorry, got mixed up. I thought he was talking about what he was doing for his company. Just kind of wary of people who go: Calling all Hackers

Re: [CentOS] To all of the group

2009-10-22 Thread Chan Chung Hang Christopher
James Bensley wrote: 2009/10/22 Chan Chung Hang Christopher christopher.c...@bradbury.edu.hk Sorry, got mixed up. I thought he was talking about what he was doing for his company. Just kind of wary of people who go: Calling all Hackers but they actually mean Calling all Crackers

Re: [CentOS] using CentOS as an iSCSI server?

2009-10-21 Thread Chan Chung Hang Christopher
Jonathan Moore wrote: On Wed, Oct 21, 2009 at 7:51 AM, Les Mikesell lesmikes...@gmail.com wrote: You can, if you connect the iscsi block devices into one machine that can combine them in one or more md raid devices, put a filesystem on them, and export via nfs and/or smb to the systems

Re: [CentOS] sendmail question

2009-10-21 Thread Chan Chung Hang Christopher
Jerry Geis wrote: Hi all, I have a local user account call panel on a machine. When I use the mail command to manually send email to the panel account it over 1 minute until that mail actually deposited in the mail account. What setting is that reduces this time? I changed

Re: [CentOS] [OT] DHCP authauth software

2009-10-19 Thread Chan Chung Hang Christopher
Marko Vojinovic wrote: Does anyone know about some free (as in beer, and maybe as in speech) software which would implement authentication and authorization of a user prior to issuing a valid dhcp lease? I imagine the following scenario: someone walks into my office building with a

Re: [CentOS] CentOS 5.4? anyone?

2009-10-16 Thread Chan Chung Hang Christopher
Toby Bluhm wrote: You Centos guys just aren't getting the message are you? We need to know EXACTLY what is going on with the release! None of this soon crap will do. Please post a progress report on packages built, isos transfered, server update progress by region, hours worked,

Re: [CentOS] test

2009-10-05 Thread Chan Chung Hang Christopher
Janez Kosmrlj wrote: testing mail delivery deliver failure: 550 Administrative Prohibition ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Asterisk and VOIP was Re: CentOS for non-tech user

2009-10-01 Thread Chan Chung Hang Christopher
When you say go voip, do you mean use sip for the stations only or also for the trunks? My experience (and the experience of those I know) is that SIP trunks don't really work consistently. But, when I say I need to learn VOIP I'm mostly talking about the station side. My goal is to

[CentOS] Asterisk and VOIP was Re: CentOS for non-tech user

2009-09-30 Thread Chan Chung Hang Christopher
Ron Blizzard wrote: On Tue, Sep 29, 2009 at 3:09 PM, Tait Clarridge t...@clarridge.ca wrote: CentOS is great for server use and if you want to learn CentOS for use as a server, Fedora is a great place to start because they are both redhat based. Chances are that if you got something to

Re: [CentOS] Asterisk and VOIP was Re: CentOS for non-tech user

2009-09-30 Thread Chan Chung Hang Christopher
You can get asterisk packages from rpmforge on Centos...but on Ubuntu you do not have to add an extra repository to get asterisk. Don't bother with that, go straight to the source! http://packages.asterisk.org/ These get updated rather quickly. Ah, now that will definitely

Re: [CentOS] CentOS for non-tech user

2009-09-29 Thread Chan Chung Hang Christopher
Niki Kovacs wrote: Geoff Galitz a écrit : Ubuntu has the LTS releases, which are long term stable releases. They are supported for five years after release. Ubuntu Long Term Support is three years for desktops and five for servers. In the last LTS version (8.04), half of the

Re: [CentOS-docs] contribute on wiki

2009-09-21 Thread Chan Chung Hang Christopher
Ralph Angenendt wrote: On Mon, Sep 21, 2009 at 1:27 PM, Chan Chung Hang Christopher christopher.c...@bradbury.edu.hk wrote: Which mail client is that supposed to be for? And: Don't the mail clients create those folders themselves via IMAP if they are needed? I've never seen the need to do

Re: [CentOS] iptables

2009-09-15 Thread Chan Chung Hang Christopher
CentOS List wrote: Hi, I have an existing iptables as follows:- # Firewall configuration written by system-config-securitylevel # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :RH-Firewall-1-INPUT - [0:0] -A

Re: [CentOS] No envelope information

2009-09-15 Thread Chan Chung Hang Christopher
Luis campo wrote: hi, have installed centos 4.7 We have installed qmail + simscan + vpopmail + SpamAssassin + clanAV and when we send a mail from a particular domain, the following error leaves us How about changing that combination of qmail + simscan to postfix + clamav-milter +

Re: [CentOS] Centos 5.3 Kernel panic with fuse and glusterfs.

2009-09-15 Thread Chan Chung Hang Christopher
Tom O'Connor wrote: Matthew Miller wrote: On Tue, Sep 15, 2009 at 03:24:52PM +0100, Tom O'Connor wrote: If anyone has any ideas for further debugging, or other routes for support. I'm running out of ideas. Enterprise Linux 5.4 with included official FUSE support

Re: [CentOS] [Found] CentOS is dead, long live CentOS

2009-09-14 Thread Chan Chung Hang Christopher
However, we are NOT accepting monetary donations at this point. We will not accept monetary donations until there is something in place where more than one person has to approve any spending and some kind of committee is in place to manage incoming and outgoing funds. ooh, ouch. A

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
Rudi Ahlers wrote: Has anyone succesfully setup, and used CentOS as an iSCSI server? I'm trying to setup a server with 4x500GB HDD's, setup in RAID 10 to act as an iSCSI server for a virtualization project, but I can't find a decent howto on how to setup an iSCSI server using CentOS. I would

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
Rainer Duffner wrote: Chan Chung Hang Christopher schrieb: Rudi Ahlers wrote: Has anyone succesfully setup, and used CentOS as an iSCSI server? I'm trying to setup a server with 4x500GB HDD's, setup in RAID 10 to act as an iSCSI server for a virtualization project, but I can't

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
chan, I already have CentOS 5.3 setup, and we need to use this as far as possible, due to some of the other software that we'll be using. See Joseph Casale's post then. It is not quite available on Centos. Roll your own is the name of the game.

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
Joseph L. Casale wrote: Can I suggest ZFS on Solaris/OpenSolaris? Real breeze to setup. As for Linux, it has been a while but are there still two iscsi-target implementations? Has any one of them got into the mainline (Linux - not Redhat - although if Redhat will support one implementation I

Re: [CentOS] looking for RAID 1+0 setup instructions?

2009-08-31 Thread Chan Chung Hang Christopher
Miguel Medalha wrote: You might be interested in this article: Why is RAID 1+0 better than RAID 0+1? http://aput.net/~jheiss/raid10/ The whole raid1+0 or raid0+1 argument was really only relevant in the days of pata when one disk dying on one channel might take out the

Re: [CentOS] what is the best way to delete so many queue files?

2009-08-31 Thread Chan Chung Hang Christopher
MontyRee wrote: Hello, all. I found that so many unnessary queue files are saved at /var/spool/clientmqueue/ directory. How do you know they are unnecessary? I tested two way to delete these files. 1. # rm -rf /var/spool/clientmqueue/* 2. # cd

Re: [CentOS] Samba Question

2009-08-26 Thread Chan Chung Hang Christopher
Now the Designers groups should have rw rights for Projects and subfolders The draghtsmen should be able to upload only files (not folders) to Final subfolder. They are not allowed to modify/delete anything anywhere. They will not have any permission in project folder any ideas?

Re: [CentOS] How to tell if I've been hacked?

2009-08-23 Thread Chan Chung Hang Christopher
Also processes you thinkk you DO recognize: Just for testing how alert my co-workers were, i had a program called kswapd, just calculating prime-numbers... They never noticed. ;-) Without any preperation it's harder. No point in installing tripwire, activating apparmor/selinux afterwards.

Re: [CentOS] OT: Strange message in root e-mail possiablly hacked!!! Not sure??

2009-08-17 Thread Chan Chung Hang Christopher
I didn't know that IPCOP could run on one that old. I have one like that up in the attic, time to bring it back down. Before I upgraded to 5.3, I was running 4.7 with FireStarter and did not have any troubles. As soon as I get some sleep I will be looking in to setting it up. If it

Re: [CentOS] OT: Strange message in root e-mail possiablly hacked!!! Not sure??

2009-08-16 Thread Chan Chung Hang Christopher
So I started looking around in /var/log. I looked at my secure logs and saw nothing out of the ordinary. I looked in samba and found a log file 58.239.84.158.log. I opened it up and it said the following: [2009/08/15 06:31:34, 0] lib/access.c:check_access(327) Denied connection from

[CentOS] Centos - Chinese

2009-08-16 Thread Chan Chung Hang Christopher
A response I got from the local LUG here in Hong Kong to a post about translating the wiki articles into Chinese pointed me to the links below: http://www.centoschina.com/ http://apt.nc.hcc.edu.tw/web/student_server_centos/student_server_centos.html Posted just in case the Centos team has an

Re: [CentOS] OT: Fortunate clueless dd chum - lvm recovery

2009-08-15 Thread Chan Chung Hang Christopher
Kristopher Kane wrote: I get to learn something new at his expense, (which is now just a scare) nice successor eh? :-D Maybe you could point him to this list for lunch time lesson reading, however, you won't be able to talk about him behind his back anymore. Haha, I am not

Re: [CentOS] OT: Fortunate clueless dd chum - lvm recovery

2009-08-15 Thread Chan Chung Hang Christopher
Lanny Marcus wrote: On Fri, Aug 14, 2009 at 8:03 AM, Kristopher Kanekristopher.k...@gmail.com wrote: I get to learn something new at his expense, (which is now just a scare) nice successor eh? :-D Maybe you could point him to this list for lunch time lesson reading, however,

Re: [CentOS] OT: Fortunate clueless dd chum - lvm recovery

2009-08-15 Thread Chan Chung Hang Christopher
Robert Nichols wrote: Ross Walker wrote: Since you don't know if LVM has a recovery path how can you imply it doesn't? I've seen plenty of evidence that tools for LVM recovery are lacking. I see postings from people asking about recovery of damaged LVM volumes and not getting

Re: [CentOS] OT: Fortunate clueless dd chum - lvm recovery

2009-08-14 Thread Chan Chung Hang Christopher
First of all, I would dd a copy of the whole drive off to another drive, so you can have a few goes at this. How do you know only those bits where lost? The dd command zeros the first 64 sectors, that is, the mbr and then the next 63 sectors which would the bootsector of the first

Re: [CentOS] Dangerous Software Raid instructions on Wiki

2009-08-13 Thread Chan Chung Hang Christopher
Max Hetrick wrote: Chan Chung Hang Christopher wrote: 1) The Title of the article says How to Setup a Software RAID on CentOS 5 2) My successor is a real HK bred and born person so his command of the English language is like most such persons; that is to say, very poor. 3) Regarding

[CentOS] OT: Fortunate clueless dd chum - lvm recovery

2009-08-13 Thread Chan Chung Hang Christopher
Looks like the chum did not have to lose any data. Wiping out the MBR and the next 63 blocks apparently only wiped out grub stage1, partition table, and part of the lvm config data. I get to try to do a lvm 'recovery' at his expense now but this is my first time...has anybody ever tried

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