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4640 discussions

CentOS and Scientific Linux Cern installations with FAI
by lange＠fai-project.org 19 Sep '11

19 Sep '11

I'm very happy to announce, that FAI (Fully automatic Installation) now can install and configure CentOS and Scientific Linux Cern (SLC). You can use a Debian FAI server for installing CentOS version 5 and 6 or SLC 5 and 6. As an example I've also built a FAI multi-distribution CD which installs those three different Linux distributions with different configurations. Get this ISO image from http://fai-project.org/fai-cd/ This installation is very quick. I've done a CentOS 6.0 installation (with graphical desktop) in 199 seconds (in a kvm instance on a quad-core 3.2GHz, hard disk in RAM) and it only needs 490 seconds on the real hardware when installing from CD. A short description how to install CentOS or SLC via network from your FAI server is described in this mail: https://lists.uni-koeln.de/pipermail/linux-fai/2011-September/009243.html Feedback is always welcome. Please send your feedback to the linux-fai mailing list https://lists.uni-koeln.de/mailman/listinfo/linux-fai/ Best regards, Thomas, in behalf of the FAI team About FAI: FAI is a non-interactive system to install, customize and manage Linux systems and software configurations on computers as well as virtual machines and chroot environments, from small networks to large infrastructures and clusters. Compared to kickstart, FAI is more flexible and includes a powerfull class mechanism to build a configuration from multiple building blocks. It also includes the features of cobbler. The project was started in 1999 for the Debian distribution. Later Ubuntu support was added and some time ago we start adding RPM support.

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incorrect diskboot.img in CentOS 5.7 i386 dvd iso
by Gianluca Cecchi 19 Sep '11

19 Sep '11

Hello, trying to make a usb install on a thin client it seems I notice an incorrect diskboot.img image in 5.7. Anyone already discovered/reported this? As soon as I boot from usb pen drive, I get an error Could not find kernel image: linux this depends on syslinux.cfg being empty sha1sum of my dvd iso is correct # sha1sum CentOS-5.7-i386-bin-DVD-1of2.iso e0eab4dd77c3ecc73080428beaa4ffe28984dc4b CentOS-5.7-i386-bin-DVD-1of2.iso # mount -o loop CentOS-5.7-i386-bin-DVD-1of2.iso /mnt/ # sha1sum /mnt/images/diskboot.img 0568258b34eda506e76801ea5bfd6b57cdd299bc /mnt/images/diskboot.img # mount -o loop /mnt/images/diskboot.img /pp on CentOS 5.7 under /pp I have: total 12244 -rwxr-xr-x. 1 root root 292 Sep 5 11:53 boot.msg -rwxr-xr-x. 1 root root 919 Sep 5 11:53 general.msg -rwxr-xr-x. 1 root root 10450542 Sep 5 11:53 initrd.img -rwxr-xr-x. 1 root root 10648 Sep 5 11:53 isolinux.bin -r-xr-xr-x. 1 root root 9660 Sep 5 11:53 LDLINUX.SYS -rwxr-xr-x. 1 root root 94600 Sep 5 11:53 memtest -rwxr-xr-x. 1 root root 817 Sep 5 11:53 options.msg -rwxr-xr-x. 1 root root 517 Sep 5 11:53 param.msg -rwxr-xr-x. 1 root root 490 Sep 5 11:53 rescue.msg -rwxr-xr-x. 1 root root 63803 Sep 5 11:53 splash.lss -rwxr-xr-x. 1 root root 0 Sep 5 11:53 syslinux.cfg -rwxr-xr-x. 1 root root 1892352 Sep 5 11:53 vmlinuz while on CentOS 5.6 total 9562 -rwxr-xr-x. 1 root root 292 Mar 29 23:15 boot.msg -rwxr-xr-x. 1 root root 919 Mar 29 23:15 general.msg -rwxr-xr-x. 1 root root 7705221 Mar 29 23:15 initrd.img -rwxr-xr-x. 1 root root 10648 Mar 29 23:15 isolinux.bin -r-xr-xr-x. 1 root root 9660 Mar 29 23:15 LDLINUX.SYS -rwxr-xr-x. 1 root root 94600 Mar 29 23:15 memtest -rwxr-xr-x. 1 root root 817 Mar 29 23:15 options.msg -rwxr-xr-x. 1 root root 517 Mar 29 23:15 param.msg -rwxr-xr-x. 1 root root 490 Mar 29 23:15 rescue.msg -rwxr-xr-x. 1 root root 63803 Mar 29 23:15 splash.lss -rwxr-xr-x. 1 root root 340 Mar 29 23:15 syslinux.cfg -rwxr-xr-x. 1 root root 1888052 Mar 29 23:15 vmlinuz Tried to simply copy the syslinux.cfg from 5.6 and recreating diskboot.img but as soon as there are some dots of the initrd phase, just before the moment when I should see the kernel messages the pc reboots itself. it is a Dell thin client Optiplex FX160 Donna if it could be a problem with my hw or other kind of problems in necessary files..... Gianluca

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URGENT: Website and fora at risk due to automated spammer account creation
by Phil Schaffner 15 Sep '11

15 Sep '11

http://bugs.centos.org/view.php?id=5105 Forum moderators have been battling spammers creating bogus accounts by the thousands using automated "bots". The only way moderators currently have to attack the problem is by a laborious process of searching for such accounts and selecting them for deletion. This has been working, although at the cost of considerable time to perform the operations; however, such accounts are currently being created at a rate of thousands per day making deletion of 50 at a time via the web interface a practical impossibility. Our approach has been to delete all "Inactive" accounts more than 7 days old (these are being created at a rate of about 1 per minute) and "Active" accounts with no posts and either no logins, or with no logins in the last 30 days. The latter are the rapidly growing problem, and more than 40,000 accounts with zero posts created between 7 and 30 days ago currently exist. Account creation at this rate will likely bring the site down if the situation is not dealt with soon. Proposed approach: 1. Implement some automated way of deleting accounts as described above. 2. Implement captcha or some other mechanism in the account creation process to foil the bots. Phil

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Need info regarding python recompilation
by Ljubomir Ljubojevic 15 Sep '11

15 Sep '11

HI. I am trying to introduce curses.menu patch into python package for CentOS 6. My intention is to compile with that patch to see what files are different (only few I guess) so I can try to create a separate python-curesemenu package. Is it possible to compile python-2.6.5-3.el6_0.2.x86_64 package on fresh install of CentOS 6.0? When I try with unchanged src.rpm, I get following error: gcc -pthread -fPIC -fno-strict-aliasing -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -I. -IInclude -I./Include -I/usr/lib64/libffi-3.0.5/include -c ./Modules/xxsubtype.c -o Modules/xxsubtype.o gcc -pthread -shared Modules/xxsubtype.o -o Modules/xxsubtype.so 'import site' failed; use -v for traceback Traceback (most recent call last): File "./setup.py", line 15, in <module> from distutils.command.build_ext import build_ext File "/autofsmounts/kancelarija/extra5/build-system/BUILD/Python-2.6.5/Lib/distutils/command/build_ext.py", line 13, in <module> from site import USER_BASE, USER_SITE File "/autofsmounts/kancelarija/extra5/build-system/BUILD/Python-2.6.5/Lib/site.py", line 517, in <module> main() File "/autofsmounts/kancelarija/extra5/build-system/BUILD/Python-2.6.5/Lib/site.py", line 500, in main known_paths = addsitepackages(known_paths) File "/autofsmounts/kancelarija/extra5/build-system/BUILD/Python-2.6.5/Lib/site.py", line 292, in addsitepackages addsitedir(sitedir, known_paths) File "/autofsmounts/kancelarija/extra5/build-system/BUILD/Python-2.6.5/Lib/site.py", line 185, in addsitedir addpackage(sitedir, name, known_paths) File "/autofsmounts/kancelarija/extra5/build-system/BUILD/Python-2.6.5/Lib/site.py", line 155, in addpackage exec line File "<string>", line 1, in <module> File "/usr/lib/python2.6/site-packages/abrt_exception_handler.py", line 27, in <module> import syslog ImportError: No module named syslog make: *** [sharedmods] Error 1 error: Bad exit status from /var/tmp/rpm-tmp.EqLA3n (%build) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.EqLA3n (%build) -- Ljubomir Ljubojevic (Love is in the Air) PL Computers Serbia, Europe Google is the Mother, Google is the Father, and traceroute is your trusty Spiderman... StarOS, Mikrotik and CentOS/RHEL/Linux consultant

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CentOS 6 location does not have symlink to 6.0 cr
by James A. Peltier 14 Sep '11

14 Sep '11

Is this intentional or something missed? Kind proves an earlier point I made that a single swap of symlink from 6 -> 6.0 to 6 -> 6.1 as more effective way of ensuring correctness than 6/centosplus -> 6.0/centosplus 6/contrib -> 6.0/contrib ... if this is by mistake. ;) -- James A. Peltier IT Services - Research Computing Group Simon Fraser University - Burnaby Campus Phone : 778-782-6573 Fax : 778-782-3045 E-Mail : jpeltier(a)sfu.ca Website : http://www.sfu.ca/itservices http://blogs.sfu.ca/people/jpeltier I will do the best I can with the talent I have

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Re: [CentOS-devel] URGENT: Website and fora at risk due to automated spammer account creation (Phil Schaffner)
by Hristo Benev 14 Sep '11

14 Sep '11

>-------- Оригинално писмо -------- >От: centos-devel-request(a)centos.org >Относно: CentOS-devel Digest, Vol 79, Issue 7 >До: centos-devel(a)centos.org >Изпратено на: Сряда, 2011, Септември 14 19:00:04 EEST >Send CentOS-devel mailing list submissions to > centos-devel(a)centos.org > >To subscribe or unsubscribe via the World Wide Web, visit > http://lists.centos.org/mailman/listinfo/centos-devel >or, via email, send a message with subject or body 'help' to > centos-devel-request(a)centos.org > >You can reach the person managing the list at > centos-devel-owner(a)centos.org > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of CentOS-devel digest..." > > >Today's Topics: > > 1. URGENT: Website and fora at risk due to automated spammer > account creation (Phil Schaffner) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Wed, 14 Sep 2011 11:44:54 -0400 >From: Phil Schaffner >Subject: [CentOS-devel] URGENT: Website and fora at risk due to > automated spammer account creation >To: "The CentOS developers mailing list." >Message-ID: >Content-Type: text/plain; charset="ISO-8859-1"; format=flowed > >http://bugs.centos.org/view.php?id=5105 > >Forum moderators have been battling spammers creating bogus accounts by >the thousands using automated "bots". The only way moderators currently >have to attack the problem is by a laborious process of searching for >such accounts and selecting them for deletion. This has been working, >although at the cost of considerable time to perform the operations; >however, such accounts are currently being created at a rate of >thousands per day making deletion of 50 at a time via the web interface >a practical impossibility. > >Our approach has been to delete all "Inactive" accounts more than 7 days >old (these are being created at a rate of about 1 per minute) and >"Active" accounts with no posts and either no logins, or with no logins >in the last 30 days. The latter are the rapidly growing problem, and >more than 40,000 accounts with zero posts created between 7 and 30 days >ago currently exist. Account creation at this rate will likely bring >the site down if the situation is not dealt with soon. > >Proposed approach: > >1. Implement some automated way of deleting accounts as described above. >2. Implement captcha or some other mechanism in the account creation >process to foil the bots. > >Phil > > >------------------------------ > >_______________________________________________ >CentOS-devel mailing list >CentOS-devel(a)centos.org >http://lists.centos.org/mailman/listinfo/centos-devel > > >End of CentOS-devel Digest, Vol 79, Issue 7 >******************************************* > There is also another way of lowering the number of accounts. It is called zbblock http://www.spambotsecurity.com/zbblock.php It has the ability to block sertain IPs based on behaviour. Good news is that it almost does not require product support. It should be used with caution too.. ----------------------------------------------------------------- 100 лв БОНУС. Най-високи коефициенти. Tempobet.com http://bg.tempobet.com/affiliates/3208311

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twitter vs open atrium dashboard
by Gianluca Cecchi 12 Sep '11

12 Sep '11

Hello, were the messages about 5.7 on twitter too optimistic or http://qaweb.dev.centos.org a little behind in term of updates? Gianluca PS: I'm available to offer some help, in term of time, if needed, in the communication side

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Does CentOS 6 udev rule format diff from CentOS 5?
by Jupiter 06 Sep '11

06 Sep '11

Hi, I've just updated from CentOS 5 to CentOS 6. I have one or my own udev rule in /etc/udev/rules.d to change permission of a USB device which works on CentOS 5 but is no longer working on CentOS 6. Are there any changes in CentOS 6 regarding to the udev rule format? Thank you. hce

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info on cr announce list
by Gianluca Cecchi 01 Sep '11

01 Sep '11

Hello, at announce message as in http://lists.centos.org/pipermail/centos-announce/2011-August/017689.html I can see in particular: - All contents in the CR repo will be announced into a separate announcement list; once 5.7 is released the announcements will be re-sent to the centos-announce list. Now I'm testing it on a CentOS 5.6 x86_64 system and indeed after enabling the CR repo it pulls and updates about 70 packages and it is working ok (comparing with a RH EL system I can see some difference, probably due to latest upstream updates not already ib sync). Same kernel version as upstream in particular. But I can't see any message at http://lists.centos.org/pipermail/centos-cr-announce/ Is this because archives are not populated or because the activation of the dedicated announce list is going to be a future step? Is CR aim only to provide security related packages or all the updates released by upstream provider in the mean time that CentOS official 5.7 isos are released? Any way to easily see what is the date current CentOS CR is in sync with? And any easy way to see time stamp of latest upstream update? BTW: during June and July the qaweb.dev.centos.org web site was filled with the calendar estimated section too and I found it very useful to have a synthetic view of milestones. Currently it is empty for 5.7 and 6.1. Is this due only to the huge amount of parallel work going through or are there any other reasons? Thanks in advance and keep on with the great work! Gianluca

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CentOS 6 Partitioning Help
by Jonathan Vomacka 01 Sep '11

01 Sep '11

Good Evening All, I have a question regarding CentOS 6 server partitioning. Now I know there are a lot of different ways to partition the system and different opinions depending on the use of the server. I currently have a quad core intel system running 8GB of RAM with 1 TB hard drive (single). In the past as a FreeBSD user, I have always made a physical volume of the root filesystem (/), SWAP, /tmp, /usr, /var, and /home. In the partitioning manager I would always specify 10GB for root, 2GB or so for SWAP, 20GB var, 50GB usr, 10GB /tmp, and allocate all remaining space to my home directory as my primary data volume (assuming all my applications are installed and ran from my home directories). I was recently told that this is an old style of partitioning and is not used in modern day Linux distributions. So more accurately, here are my questions to the list: 1) What is a good partition map/schema for a server OS where it's primary purpose is for a LAMP server, DNS (bind), and possibly gameservers 2) CentOS docs recommend using 10GB SWAP for 8GB of RAM. 1X the amount of physical memory + 2GB added. (Reference: http://www.centos.org/docs/5/html/Installation_Guide-en-US/s1-diskpartition…) I was told this is ridiculous and will severely slow down the system. Is this true? If so, what is a good swap space to use for 8GB of RAM? The university of MIT recommends making MULTIPLE 2GB swap spaces equaling 10GB if this is the case. Please help! 3) Is EXT4 better or worse to use then XFS for what I am planning to use the system for? Thanks in advance for all your help guys Kind Regards, Jonathan Vomacka

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