February 2011 - Discuss - lists.centos.org

SSH AllowUser WildCard
by Stephen Cox 08 Feb '11

08 Feb '11

Is it possible to allow a user to login from an changing hostname like: username(a)*hoststringfixed.com -- Stephen Cox

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How and when are the sound modules loaded at system boot time on CentOS 5?
by James Pearson 08 Feb '11

08 Feb '11

I've been trying to work out how the various sound modules get loaded at boot time on CentOS 5 - but I can't find anything obvious under /etc/rc.d/ CentOS 4 did this in /etc/rc.d/rc.sysinit - but there is nothing equivalent in CentOS 5 Does anyone know how these modules get loaded? Thanks James Pearson

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premature question on 5.6
by Jerry Geis 08 Feb '11

08 Feb '11

What will be the correct way to migrate ext3 to ext4 going from 5.5 to 5.6? Will something after the update ask if you want to migrate the file systems? Looking forward to some file system speed ups with large files. Thanks Jerry

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Is there a Centos 3 around ?
by Nicolas Ross 08 Feb '11

08 Feb '11

Hi ! I think one of my machine got hacked, but I can figure out from where... I found some suspicious file in /bin and /usr/bin directories that are owned by user id 122, where this machine doesn't a userid 122. So, does anyone hav a centos 3.9 install arround that can send me the info about (filesize, md5, modification date) these file : /bin : ls netstat ps /usr/bin/ dir find md5sum pstree slocate tee top What tiped me off, I was sudoing to another user, and swas this message : "Unknown HZ value! (92) Assume 100." Thanks

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RHEL 6 <-> CentOS 6 ?
by Nicolas Ross 07 Feb '11

07 Feb '11

Hi ! We are curently deploying an 8 nodes cluster where we have a RHEL 6 license at great costs (~14 k$/y). It will be our new production environment for mission-critical services. Now our aging developpement server (old p4 with 1.5 gig of ram) need to be updated. We will be installing on hardware as close as possible to the new production servers, just not in a rack... For the developement server, I won't be needing the RH support (and price that goes with it). So I wsish to install it under CentOS. But 6 isn't out yet. (by the way, when ;-) ?). I do have a spare slot in my rhn that I can install the new server with. Will RHEL 6 be as easy to switch to CentOS 6 as were RHEL/CentOS 5 ? That is install a couple of rpms, yum update and voilà ? Thanks,

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Re: [CentOS] Fan speed control on Supermicro X8DAL board with CentOS
by Chuck Munro 07 Feb '11

07 Feb '11

On Sun, 06 Feb 2011 12:09:12 +0000 Ned Slider wrote: > > On 06/02/11 07:00, Chuck Munro wrote: >> > Hello folks, >> > >> > I'm having a difficult time trying to figure out why the CPU cooling >> > fans run at full speed on my Supermicro X8DAL-3 motherboard. There >> > doesn't seem to be any variable speed (the fans are PWM compatible) ... >> > they either idle at almost nothing, or suddenly burst into a >> > high-pitched scream that gets my ears bleeding after a few seconds. >> > Once they jump to warp-10, they remain there. >> > >> > The "Super-I/O" chip on this board is a Winbond W83627DHG which does the >> > temperature and voltage monitoring. >> > >> > Is anyone aware of which driver or kernel module I need for that chip in >> > order to get control of the fans? The Supermicro web site and the >> > board's manual aren't any help. Fresh installs of CentOS-5.5 and RHEL-6 >> > don't exert any control by default. Installing the lm_sensors package >> > and probing with the 'sensors' command didn't help either. >> > >> > Slowly going deaf ....... >> > >> > Chuck > > Hi Chuck, > > The correct kernel module for your chipset is w83627ehf.ko. I'm not sure > the driver actually controls fan speed, I thought it was more for > monitoring (fan speeds, temps, voltages) but I could be wrong. My > current system (not a Supermicro) controls variable fan speed from > options within the BIOS. I can enable/disable fan speed control and > select either voltage or PWM based control. > > The stock w83627ehf driver in RHEL5.5 is oldish (they were updated in > 5.5 I think but are still over a year old now). ELRepo.org have an > updated driver available (kmod-w83627ehf) based on a backport from > kernel-2.6.34. I've just checked upstream and a few more patches have > been committed since kernel-2.6.34 and the current kernel-2.6.37 so I'll > look at updating the elrepo driver with those latest patches. > > Hope that helps. > > Thanks Ned! I did go through the board's BIOS menus several times and could find only one fan control option, which ranges from always-fast for maximum performance to almost-silent for workstation use. No matter what the setting, the fans may start out slow but eventually jump to high speed. Updating the BIOS to the latest version made no difference. I also noticed that at all times the BIOS reports the CPU temperatures as "Low" no matter what the fan speed. The coolers are always cold to the touch. I sure hope I don't have a defective board ... it's a royal pain to have to remove one from a large server. I booted Ubuntu but the live-CD version doesn't have a working 'fancontrol' utility. I'd be tempted to install Ubuntu Server but I much prefer staying with CentOS and KVM to match all of the guest virtual machines it'll be running. Time to go through the mobo manual with a fine-tooth comb. :-) Chuck

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Autorun is VERY bad
by kellyremo 07 Feb '11

07 Feb '11

How to disable autorun? Are there any hidden autorun features on a standard CentOS install?? http://securitytube.net/USB-Autorun-attacks-against-Linux-at-Shmoocon-2011-…

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system clock
by Buz Davis 07 Feb '11

07 Feb '11

I am running CntOS 5 with Gnome. Every now and then I have noticed that the computer will somehow get the time wrong by several hours. Is there a simple way to adjust the time? So far the only way I have found is to boot into windows (it is a dual boot system), make the change there, and then get back into CentOS. Older versions of Red Hat and Fedora let you do it by right-clicking on the time display, if I recall correctly, but setting the time isn't one of the options in CentOS. Thanks Buz Davis

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RHEL/Centos6 handling disks w/4k sectors?
by Les Mikesell 07 Feb '11

07 Feb '11

Does anyone know if 4k sectors will be handled better by the kernel in Centos6? I'd like to copy backups to a 750Gb laptop type drive for offsite storage but the best write speed I can get is about 8MB/sec even with dd to the raw disk which shouldn't have an issue with partition alignment. -- Les Mikesell lesmikesell(a)gmail.com

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selenium rc server - run it on a specific display help!
by Roland RoLaNd 07 Feb '11

07 Feb '11

Dear all, i'm trying to run multiple selenium rc server on a centos box (different ports) with developers connecting to it through VNC (different respective ports) to check their automated test result. i can easily do the above manually (when it comes to running RC server). though automating the process is proving to be difficult. can anyone guide me on how to run a service on a specific display in an automated process? right now if i connect to a vnc session (any port) and i run it manually through iterm, it works normally. though setting an cron job that does the above, isnt working (rc opens in shell instead of on each dev's assigned display)

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OpenSSH could be faster...then why don't they path it??
by kellyremo 07 Feb '11

07 Feb '11

https://www.psc.edu/networking/projects/hpn-ssh/hpn-v-ssh-tput.jpg "SCP and the underlying SSH2 protocol implementation in OpenSSH is network performance limited by statically defined internal flow control buffers. These buffers often end up acting as a bottleneck for network throughput of SCP, especially on long and high bandwith network links. Modifying the ssh code to allow the buffers to be defined at run time eliminates this bottleneck. We have created a patch that will remove the bottlenecks in OpenSSH and is fully interoperable with other servers and clients. In addition HPN clients will be able to download faster from non HPN servers, and HPN servers will be able to receive uploads faster from non HPN clients. However, the host receiving the data must have a properly tuned TCP/IP stack." My question is: So Why Does the original OpenSSH has "limited statically defined internal flow control buffers"?? It could be way faster, even 10x!! With the HPN-SCP path it could be the descendant of FTP! Why aren't there any ""OpenSCP packages""? ('normal SCP+HPN-SCP path+no local user needed for SCP'ing+chroot by default') Any opinions? Thank you!

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if the file changes send email about diff
by kellyremo 06 Feb '11

06 Feb '11

I have 2 script. Script "A", Script "B". Script "A" is regulary watching the "dhcpacks" [dhcp release is configured to 2mins] in the logs, for the past 2 minutes. it writes the MAC addresses to a file [/dev/shm/dhcpacks-in-last-2min.txt] every 2 minutes. Ok, this is working, active clients are in this file. Super! Script "B": http://pastebin.com/raw.php?i=wvhwhPWu I'm trying to create a script, that watches the changes in "/dev/shm/dhcpacks-in-last-2min.txt" file [in every 1 sec]. Ok. But: my "watcher" script [the pastebined] is not working fine...sometime it works, sometime it send that someone "XY logged out", but it's not true! nothing happened, and the problem is not in the Script "A". Can someone help me point out, what am i missing? How can i watch a file [in every sec], that contains only MAC addresses, and if someone doesn't get dhcpack in 2 minutes, the file "/dev/shm/dhcpacks-in-last-2min.txt" changes, and that clients MAC address will be gone from it, and i need to know, who was it [pastebined my script..but somethings wrong with it]. Thank you for any help..i've been pathing my script for days now.. :\

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future version of bind for el5
by fakessh ＠ 06 Feb '11

06 Feb '11

hello all the people I'd call http://people.redhat.com/ atkac ~ / official member of the team redhat for news of future versions of bind 9.7 for el5 sincerely -- gpg --keyserver pgp.mit.edu --recv-key 092164A7 http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x092164A7

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Fan speed control on Supermicro X8DAL board with CentOS
by Chuck Munro 06 Feb '11

06 Feb '11

Hello folks, I'm having a difficult time trying to figure out why the CPU cooling fans run at full speed on my Supermicro X8DAL-3 motherboard. There doesn't seem to be any variable speed (the fans are PWM compatible) ... they either idle at almost nothing, or suddenly burst into a high-pitched scream that gets my ears bleeding after a few seconds. Once they jump to warp-10, they remain there. The "Super-I/O" chip on this board is a Winbond W83627DHG which does the temperature and voltage monitoring. Is anyone aware of which driver or kernel module I need for that chip in order to get control of the fans? The Supermicro web site and the board's manual aren't any help. Fresh installs of CentOS-5.5 and RHEL-6 don't exert any control by default. Installing the lm_sensors package and probing with the 'sensors' command didn't help either. Slowly going deaf ....... Chuck

2 1

Significant speedup of package building with mock from EPEL for RHEL 6, should definitely go in CentOS 5
by Nico Kadel-Garcia 05 Feb '11

05 Feb '11

The speedups in building RPM's with "mock" from the EPEL packages for RHEL 6 are *profound*, especially if your environment is like mine and you have thousands of user id's. The issue seems to be the handling of "/var/log/lastlog" and similar files, which are otherwise quite large and take significant time to compress and uncompress when laying out new mock environments. Karabhir, what are the odds of encouragng a switch to http://mirrors.kernel.org/fedora-epel/6/mock-1.1.8-1.el6.src.rpm, and backporting it to centos/5/5/extras ? It's working very well for me, and I think it would be a helpful improvement in RPM building for both the CentOs 5.6 and CentOS 6 efforts.

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x25 line xterm
by Hal Davison 05 Feb '11

05 Feb '11

Noted that xterm by default uses 24 lines per window. I have reviewed /etc/termcap looking for a specific entry for xterm that I can edit to change the ln#24 to ln#25 for our application. When I used RedHat there was an editable option to change the number of displayable lines as is done in putty. Any suggestions? --Hal. -- Hal Davison Observe Goal, Set the course, Burn the map Davison Consulting This correspondence was composed using Dragon Speaking Version 10 Peg#: 2007011701

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CentOS 6.0 alpha testers
by valent.turkovic＠gmail.com 05 Feb '11

05 Feb '11

Hi guys, who do I need to contact to become CentOS tester? When is first alpha due for release and testing? Cheers, Valent. -- follow me - www.twitter.com/valentt & http://kernelreloaded.blog385.com linux, anime, spirituality, wireless, scuba, linuxmce smart home, zwave ICQ: 2125241, Skype: valent.turkovic, MSN: valent.turkovic(a)hotmail.com

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LiveCD System recovery - Mounting LVM?
by Johan Martinez 05 Feb '11

05 Feb '11

Hi, I am trying to recover data from my old system which had LVM. The disk had two partitions - /dev/sda1 (boot, Linux) and /dev/sda2 (Linux LVM). I had taken a backup of both partitions using dd. Now I am booting of CentOS live cd for system restore. I recreated partitions like previous system using fdisk and then used dd to dump all the data onto it. I would like to mount sda2 as LVM, but I don't know how to do that. Any steps or howto mount LVM manually would be really helpful. I think I can recover the system once I am able to access sda1 and sda2. Any help? jM.

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Unable to connect to wireless network
by Jatin 05 Feb '11

05 Feb '11

Hi CentOS users I just installed the CentOS 5.5 version on my toshiba laptop. I did the configuration that i had for the wireless settings but still i could not connect to my home wireless network. So someone please guide me on how i can connect my laptop to my wireless home network. Thanks Jatin

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compiz install on centos 5.2
by sylvan.dcunha＠gmail.com 04 Feb '11

04 Feb '11

Dear All, I know this not the right place but guess someone out in this forum will defuinately be kind enogh to advise and help me and would highly apprecite that I am new to compiz and have installed compiz but its does not work .. as it gives the following error when i run it Installed compiz as per this document http://azlan.anilezfa.com/install-compi ... nux-centos but get the following error when i run fusion-icon ------------------- * Detected Session: unknown * Searching for installed applications... Backend : ini Integration : true Profile : default Adding plugin decoration (decoration) Initializing decoration options...done * No GLX_EXT_texture_from_pixmap with direct rendering context ... nor with indirect rendering, this isn't going to work! * Using the GTK Interface * Starting Compiz ... executing: compiz --replace --sm-disable --ignore-desktop-hints ccp compiz (core) - Fatal: No composite extension ------------------------- I am using the following Centos 5.2 final vga vard is VGA compatible controller: nVidia Corporation NV6 [Vanta/Vanta LT] (rev 15) my xorg.conf is as below Section "ServerLayout" Identifier "Default Layout" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "us" EndSection Section "Device" Identifier "Videocard0" Driver "nv" EndSection Section "Screen" Identifier "Screen0" Device "Videocard0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection Start x works fine and am able to use the GUI perfectly Really would apprecite your kind help and advice.. the computer has a on board display card thanks and regards sylvan

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Re: [CentOS] Unable to connect to wireless network
by leeodraper＠googlemail.com 04 Feb '11

04 Feb '11

Hello Jatin This might mean that you don't have the drivers for the wireless card installed. My laptop has a button that when press switches the wireless card on and a LED turns blue. If I don't have the drivers installed then the light does not turn blue. Lee ------Original Message------ From: Jatin Sender: centos-bounces(a)centos.org To: centos(a)centos.org ReplyTo: CentOS mailing list Subject: [CentOS] Unable to connect to wireless network Sent: 4 Feb 2011 16:15 Hi CentOS users I just installed the CentOS 5.5 version on my toshiba laptop. I did the configuration that i had for the wireless settings but still i could not connect to my home wireless network. So someone please guide me on how i can connect my laptop to my wireless home network. Thanks Jatin _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos Sent from my BlackBerry® wireless device

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CentOS-announce Digest, Vol 72, Issue 1
by centos-announce-request＠centos.org 04 Feb '11

04 Feb '11

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2011:0170 Moderate CentOS 4 i386 libuser - security update (Tru Huynh) 2. CESA-2011:0170 Moderate CentOS 4 x86_64 libuser - security update (Tru Huynh) 3. CESA-2011:0180 Moderate CentOS 4 i386 pango - security update (Tru Huynh) 4. CESA-2011:0180 Moderate CentOS 4 x86_64 pango - security update (Tru Huynh) 5. CESA-2011:0181 Important CentOS 4 i386 openoffice.org and openoffice.org2 - security update (Tru Huynh) 6. CESA-2011:0181 Important CentOS 4 x86_64 openoffice.org and openoffice.org2 - security update (Tru Huynh) 7. CESA-2011:0197 Moderate CentOS 4 i386 postgresql - security update (Tru Huynh) 8. CESA-2011:0197 Moderate CentOS 4 x86_64 postgresql - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Fri, 4 Feb 2011 11:41:22 +0100 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2011:0170 Moderate CentOS 4 i386 libuser - security update To: centos-announce(a)centos.org Message-ID: <20110204104122.GA24321(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2011:0170 libuser security update for CentOS 4 i386: https://rhn.redhat.com/errata/RHSA-2011-0170.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/libuser-0.52.5-1.1.el4_8.1.i386.rpm updates/i386/RPMS/libuser-devel-0.52.5-1.1.el4_8.1.i386.rpm source: updates/SRPMS/libuser-0.52.5-1.1.el4_8.1.src.rpm You may update your CentOS-4 i386 installations by running the command: yum update libuser Tru -- Tru Huynh (mirrors, CentOS i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

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yum confusion...
by John Doe 04 Feb '11

04 Feb '11

Hi, I just installed a new server and my final yum update fails... I have rpmforge and rpmforge-extras, but with yum priorities... # grep enabled /etc/yum/pluginconf.d/priorities.conf enabled = 1 # cat /etc/yum.repos.d/CentOS-Base.repo | grep "priority\|^\[" [base] priority=1 [updates] priority=1 ... # yum clean all # yum list | grep "tcp_wrappers\|nfs-utils" nfs-utils.x86_64 1:1.0.9-47.el5_5 installed nfs-utils-lib.x86_64 1.0.8-7.6.el5 installed tcp_wrappers.i386 7.6-40.7.el5 installed tcp_wrappers.x86_64 7.6-40.7.el5 installed nfs-utils-lib.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.x86_64 1.0.8-7.6.el5 base tcp_wrappers-devel.x86_64 7.6-57.el5.rfx rpmforge-extras tcp_wrappers-libs.x86_64 7.6-57.el5.rfx rpmforge-extras # yum update ... 132 packages excluded due to repository priority protections Setting up Update Process Resolving Dependencies --> Running transaction check --> Processing Dependency: tcp_wrappers for package: nfs-utils --> Processing Dependency: tcp_wrappers for package: nfs-utils ---> Package tcp_wrappers-devel.x86_64 0:7.6-57.el5.rfx set to be updated ---> Package tcp_wrappers-libs.x86_64 0:7.6-57.el5.rfx set to be updated --> Finished Dependency Resolution 1:nfs-utils-1.0.9-47.el5_5.x86_64 from installed has depsolving problems --> Missing Dependency: tcp_wrappers is needed by package 1:nfs-utils-1.0.9-47.el5_5.x86_64 (installed) Error: Missing Dependency: tcp_wrappers is needed by package 1:nfs-utils-1.0.9-47.el5_5.x86_64 (installed) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest I removed tcp_wrappers.i386 # yum list | grep "tcp_wrappers\|nfs-utils" nfs-utils.x86_64 1:1.0.9-47.el5_5 installed nfs-utils-lib.x86_64 1.0.8-7.6.el5 installed tcp_wrappers.x86_64 7.6-40.7.el5 installed nfs-utils-lib.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.x86_64 1.0.8-7.6.el5 base tcp_wrappers.i386 7.6-40.7.el5 base tcp_wrappers-devel.x86_64 7.6-57.el5.rfx rpmforge-extras tcp_wrappers-libs.x86_64 7.6-57.el5.rfx rpmforge-extras # yum update ... 132 packages excluded due to repository priority protections Setting up Update Process Resolving Dependencies --> Running transaction check --> Processing Dependency: tcp_wrappers for package: nfs-utils ---> Package tcp_wrappers-devel.x86_64 0:7.6-57.el5.rfx set to be updated ---> Package tcp_wrappers-libs.x86_64 0:7.6-57.el5.rfx set to be updated --> Running transaction check ---> Package tcp_wrappers.i386 0:7.6-40.7.el5 set to be updated --> Finished Dependency Resolution Dependencies Resolved ==================================================================================================== Package Arch Version Repository Size ==================================================================================================== Installing: tcp_wrappers-devel x86_64 7.6-57.el5.rfx rpmforge-extras 8.7 k replacing tcp_wrappers.x86_64 7.6-40.7.el5 tcp_wrappers-libs x86_64 7.6-57.el5.rfx rpmforge-extras 88 k replacing tcp_wrappers.x86_64 7.6-40.7.el5 Installing for dependencies: tcp_wrappers i386 7.6-40.7.el5 base 109 k nfs-utils insists on reinstalling tcp_wrappers.i386, and priorities apparently does not protect the CentOS packages... If I disable rpmforge, I get "No Packages marked for Update", but still have "7 packages excluded due to repository priority protections" If I also disable priorities, I just get "No Packages marked for Update" # ll /etc/yum.repos.d/ total 28 -rw-r--r-- 1 root root 2412 Jan 27 14:38 CentOS-Base.repo -rw-r--r-- 1 root root 626 Apr 26 2010 CentOS-Media.repo -rw-r--r-- 1 root root 739 Nov 13 04:55 mirrors-rpmforge -rw-r--r-- 1 root root 717 Nov 13 04:55 mirrors-rpmforge-extras -rw-r--r-- 1 root root 728 Nov 13 04:55 mirrors-rpmforge-testing -rw-r--r-- 1 root root 1113 Feb 2 17:15 rpmforge.repo Any idea what is going on or how I can clean up this mess...? Do you have to block all i386 packages? Thx, JD

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Directions please..
by Hal Davison 04 Feb '11

04 Feb '11

Greetings... OS: CentOS 5.5 Attempting to run a database, PROGRESS, give the error: error wile loading shared libraries: libstdc++libc6.2.2.so.3: cannot open shared object file: No such file or directory I am relatively a noob at CentOS. So you kind assistance in pointing me in the correct direction would be appreciated. --Hal. -- Hal Davison Observe Goal, Set the course, Burn the map Davison Consulting This correspondence was composed using Dragon Speaking Version 10 Peg#: 2007011701

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Recovering LVM volumes
by Sanjay Arora 04 Feb '11

04 Feb '11

Hello all I have two sets of eIDE hard drives from earlier servers, one centos & one fedora. Both were LVM volumes with three or four physical disks, with ext3 fs. One disk, maybe even the boot one may even be missing, either from one or both sets and we do not know the disk order. I got these left from an earlier sysadmin who left the company & nobody know what's what. I need to recover data so I need to backup each of the disks to a disk image file first, then find block-size/recover lvm metadata on the volume, mount the volume to my current server and recover whatever files can be recovered manually. My question is: - what switches to be used with dd in creating the image, so that I retain the lvm disk data, for future recovery, if I mess up the recovery job? Can you please give the actual command assuming disk is connected at /dev/sdb? - How do I find the blocksize used by the disk & how do I get the meta-data and mount the disk to current lvm fs. Request please give me step by step process. I am finding the howtos & examples on the net very daunting as most of them have co-issues of raid etc. Mine is a plain lvm spanning multiple disks. I don't have expertise of this level & suddenly my boss is expecting me to perform a miracle. Please help. With best regards. Sanjay.

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Discuss February 2011