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CentOS 6: Increase shared memory limits permanently
by Alexander Farber 04 Oct '11

04 Oct '11

Hello again, on CentOS 6 / 64 bit what is please the best way to permanently increase the shared memory? I'd like to give shared_buffers = 4096MB to PostgreSQL 8.4 on my machine with 16 GB RAM, but I currently only have: # sysctl -A|grep shm kernel.shmmax = 33554432 kernel.shmall = 2097152 kernel.shmmni = 4096 and this produces the error in /var/lib/pgsql/pgstartup.log: FATAL: could not create shared memory segment: Invalid argument DETAIL: Failed system call was shmget(key=5432001, size=4399202304, 03600). HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded your kernel's SHMMAX parameter. You can either reduce the request size or reconfigure the kernel with larger SHMMAX. To reduce the request size (currently 4399202304 bytes), reduce PostgreSQL's shared_buffers parameter (currently 524288) and/or its max_connections parameter (currently 103). If the request size is already small, it's possible that it is less than your kernel's SHMMIN parameter, in which case raising the request size or reconfiguring SHMMIN is called for. The PostgreSQL documentation contains more information about shared memory configuration. And I wonder if I should set shmmax or shmall and also if these 2 limits are total for all machine processes or per process? (i.e. should I allow a bit more for processes besides PostgreSQL)? Thank you Alex

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Re: [CentOS] CentOS 6: hostname and timezone
by Alexander Farber 04 Oct '11

04 Oct '11

Thank you all, On Tue, Oct 4, 2011 at 4:26 PM, lists-centos <replies-lists-b3z2-centos(a)listmail.innovate.net> wrote: > 2 - you can do the symbolic link, but i believe that RH moved > away from that approach for some reason. the appropriate > TZ file is copied to /etc/localtime when the TZ is selected > on install or changed. is there maybe a command for setting TZ "in a CentOS way"? I've looked for redhat-* centos-* system-* in /sbin and /usr/sbin Regards Alex

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CentOS-announce Digest, Vol 80, Issue 1
by centos-announce-request＠centos.org 04 Oct '11

04 Oct '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-2011:1349 Important CentOS 5 i386 rpm Update (Karanbir Singh) 2. CESA-2011:1349 Important CentOS 5 x86_64 rpm Update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Mon, 3 Oct 2011 21:56:34 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2011:1349 Important CentOS 5 i386 rpm Update To: centos-announce(a)centos.org Message-ID: <20111003215634.GA8703(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2011:1349 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2011-1349.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: 4d585e8b12ce27b13ffb5e0d45f9569b popt-1.10.2.3-22.el5_7.2.i386.rpm 82008752811345bd48c567d238545cde rpm-4.4.2.3-22.el5_7.2.i386.rpm 4cf07794cbd47cd8571b8e9874fd0e80 rpm-apidocs-4.4.2.3-22.el5_7.2.i386.rpm 85b67b4e8e65eb788b66f3c6948ea855 rpm-build-4.4.2.3-22.el5_7.2.i386.rpm 9519d6cb24377a322153fdeef3f5999a rpm-devel-4.4.2.3-22.el5_7.2.i386.rpm 90e0e70797846e33bdf987a5fe0b5e9e rpm-libs-4.4.2.3-22.el5_7.2.i386.rpm 5879391ce7c0d718981425375e21522f rpm-python-4.4.2.3-22.el5_7.2.i386.rpm Source: 688cb231c484ea974b4513723f30e273 rpm-4.4.2.3-22.el5_7.2.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Mon, 3 Oct 2011 21:56:35 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2011:1349 Important CentOS 5 x86_64 rpm Update To: centos-announce(a)centos.org Message-ID: <20111003215635.GA8720(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2011:1349 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2011-1349.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: 4d585e8b12ce27b13ffb5e0d45f9569b popt-1.10.2.3-22.el5_7.2.i386.rpm 641c57febb29ba8b5e392c321c2e6e81 popt-1.10.2.3-22.el5_7.2.x86_64.rpm 9f9374ac2507e34bf32333ff0f746109 rpm-4.4.2.3-22.el5_7.2.x86_64.rpm 6ae381a435da30c8d6a58957eee28d71 rpm-apidocs-4.4.2.3-22.el5_7.2.x86_64.rpm 3bfd537e4171e4da4edce6a902ed9a3b rpm-build-4.4.2.3-22.el5_7.2.x86_64.rpm 9519d6cb24377a322153fdeef3f5999a rpm-devel-4.4.2.3-22.el5_7.2.i386.rpm 8d32b2dfc3674f69e436c938dbb90f25 rpm-devel-4.4.2.3-22.el5_7.2.x86_64.rpm 90e0e70797846e33bdf987a5fe0b5e9e rpm-libs-4.4.2.3-22.el5_7.2.i386.rpm dea6f90e1b8fcd0749e6a0721e2fb4c6 rpm-libs-4.4.2.3-22.el5_7.2.x86_64.rpm 0ca72c28170c938d5684ecddbf46d47c rpm-python-4.4.2.3-22.el5_7.2.x86_64.rpm Source: 688cb231c484ea974b4513723f30e273 rpm-4.4.2.3-22.el5_7.2.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 80, Issue 1 **********************************************

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CentOS 6: hostname and timezone
by Alexander Farber 04 Oct '11

04 Oct '11

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

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Hardware Asset Information
by Kaushal Shriyan 04 Oct '11

04 Oct '11

Hi, Is there a way to find total numbers of Hard disk attached or mounted on remote servers totaling around 200 Servers running CentOS Server and also the number of RAM Chips attached to the system. Any utility or some gui tool from client desktop ? Regards Kaushal

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Backup and restore for CentOS 5.5
by Denis 03 Oct '11

03 Oct '11

Hi - I have a NFS/NIS server environment running CentOS 5.5 on a Dell Optiplex 240. I would like to back it up and then move it to a new machine. Couple of questions: 1. This is an older computer Dell Optiplex 240 that I am unable to connect a USB drive to. In the "linux rescue" environment fdisk -l shows only /dev/hda but lsusb shows the three partitions that are on the drive. I would like to know how to connect the USB drive to the system so I can rsync or dd to the drive. 2. I was going to rsync a backup, excluding /proc, /sys, /dev and /tmp, either to a mounted USB drive or to a remote station. I know how to do that but how do I setup the drive up for the restore on the new computer. I have google'd but without success. I would think I need to format the hard drive, then run the LVM tools (<-very ignorant here), and install grub after all the files are in place (maybe mkinitrd too). Is there information avaiable to do this or would some be willing to provide what I would need to accomplish this. Thanks, -- Denis Becker

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creating C6 xen VM and virt-install
by Mark Pryor 03 Oct '11

03 Oct '11

List, Now that Centos 6 is here, virt-install fails to launch an install for a C6 xen domU. The virt-install script is part of libvirt and is in package: python-virtinst.noarch the script, OSDistro.py, has a path hard-coded for a rhelX or centos VM install. IOW, ./images/xen is appended to the provided mirror URL to get the kernel/initrd.img pair needed for a netboot. Centos 6 repos don't have this subfolder in the images branch, but they have ./images/isolinux. Is there a reason that ./images/xen subfolder can't be created and populated with the boot pair from the ISOLINUX subfolder? I believe another RH clone project does this with good results. Help keep virt-install working with C6 and fix this, please. -- Mark

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hdr SHA1: BAD, not hex
by m.roth＠5-cent.us 03 Oct '11

03 Oct '11

Got a problem with one workstation. What I'm seeing, from a yum update (saw it with make whatis first): <snip> Running rpm_check_debug error: rpmdbNextIterator: skipping h# 1211 hdr SHA1: BAD, not hex <repeated many times> <snip> ERROR with rpm_check_debug vs depsolve: libicui18n.so.36 is needed by boost-1.33.1-10.el5_7.3.i386 libicuuc.so.36 is needed by boost-1.33.1-10.el5_7.3.i386 Complete! (1, [u'Please report this error in http://bugs.centos.org/set_project.php?project_id=16&ref=http://bugs.centos…']) <snip> Are there any workarounds, or do I need to file this bug? mark

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VLAN support?
by Les Mikesell 03 Oct '11

03 Oct '11

Are there any new tools in CentOS 6 to configure VLAN interfaces (where the switch passes multiple tagged VLANs over one physical link to the host) or is it best to edit /etc/sysconfig/network-scripts/eth?.vlan# files manually? -- Les Mikesell lesmikesell(a)gmail.com

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PCI-E not supported in kernel 2.6.32-131.12.1.el6
by Lorenzo Martínez Rodríguez 03 Oct '11

03 Oct '11

Hello, I own a PCI-Express parallel card installed on my server Fujitsu TX100 S2. I am running CentOS 6 x64. In Kernel version 2.6.32-71.29.1.el6.x86_64, it was correctly detected as: [root@Carmen ~]# lspci -vvv -s 05:00.2 05:00.2 Parallel controller: NetMos Technology Device 9912 (prog-if 03 [IEEE1284]) Subsystem: Device a000:2000 Physical Slot: 4 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 32 bytes Interrupt: pin C routed to IRQ 11 Region 0: I/O ports at 2018 [size=8] Region 1: I/O ports at 2010 [size=8] Region 2: Memory at c0105000 (32-bit, non-prefetchable) [size=4K] Region 5: Memory at c0104000 (32-bit, non-prefetchable) [size=4K] Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Capabilities: [78] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0-,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [80] Express (v1) Legacy Endpoint, MSI 00 DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <1us, L1 <2us ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- DevCtl: Report errors: Correctable- Non-Fatal+ Fatal+ Unsupported- RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend- LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <64ns, L1 unlimited ClockPM+ Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk- ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt- Capabilities: [100] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol- UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol- CESta: RxErr+ BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn- To be able to load it I had to configure the file /etc/modprobe.d/parport_pc.conf with the line "options parport_pc io=0x2018" Nevertheless, in CentOS the new kernel 2.6.32-131.12.1.el6 was released and I have lost all compatibility with this PCI-Express card. Now, if I execute an lspci -vv a message with the text "!!! Unknown header type 7f" appears If I downgrade to 2.6.32-71.29.1.el6.x86_64 the card is recognised and starts to work again. Can you please help me in any way? do you know if is it maybe a bug or only unsupported hardware in new kernels? Best regards, -- Lorenzo Martinez Rodriguez Visit me: http://www.lorenzomartinez.es Mail me to: lorenzo(a)lorenzomartinez.es My blog: http://www.securitybydefault.com My twitter: @lawwait PGP Fingerprint: 97CC 2584 7A04 B2BA 00F1 76C9 0D76 83A2 9BBC BDE2

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