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gnome 3 on CentOS
by Nguyen Vu Hung 15 Jul '11

15 Jul '11

Hi all, How can I install gnome 3 to CentOS 5.6 or CentOS 6.0? Thanks

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question on compatibility and ldd
by Jerry Geis 15 Jul '11

15 Jul '11

I have a number of programs I wrote on Centos 5 (x86_64) and for one of the programs I do ldd programX linux-vdso.so.1 => (0x00007fff2cb86000) libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003528600000) libm.so.6 => /lib64/libm.so.6 (0x0000003527e00000) libxml2.so.2 => /usr/lib64/libxml2.so.2 (0x0000003531400000) libz.so.1 => /usr/lib64/libz.so.1 (0x0000003528a00000) libc.so.6 => /lib64/libc.so.6 (0x0000003527a00000) /lib64/ld-linux-x86-64.so.2 (0x0000003527600000) libdl.so.2 => /lib64/libdl.so.2 (0x0000003528200000) On C6 I do the same thing and the numbers in (Y) might change but everything else is the same for libraries. Is it safe to assume then that if I switch to C6 and recompile my program and then put the C6 version on all my C5 systems (updates that kind of thing) that everything will be compatible and run just fine. Is that the case? Thanks, Jerry

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CentOS6: installing 32bit and 64bit RPMS via the installer?
by James Pearson 15 Jul '11

15 Jul '11

Installing 64bit CentOS6 only installs x86_64 and noarch RPMS - however, I have a number of legacy 32bit apps that require a number of 32bit RPMS to be installed. Does anyone know how to get the installer to install the 32bit versions of 64bit RPMS? i.e. in the way it does for CentOS5. Thanks James Pearson

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CentOS 6 CDs isos...
by John Doe 15 Jul '11

15 Jul '11

Hey, just wondering if CentOS 6 CDs isos are also planned, or if there will be only the DVDs ones...? Thx, JD

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amd64_edac: probe of 0000:00:18.2 failed with error -22
by Always Learning 15 Jul '11

15 Jul '11

amd64_edac: probe of 0000:00:18.2 failed with error -22 Logwatch shows this error on several machines - laptop and desktops - all running C 5.6. It never appears on the data centre servers. I have 'googled' but can not identify what error 22 is. One German posting suggests it is related to the Error Correction Code (ECC) of RAM. http://en.wikipedia.org/wiki/ECC_memory suggests the problem may be caused by laptops and desktops without a ECC facility on their motherboards. Can one safely continue to ignore this error? Thank you. -- With best regards, Paul. England, EU.

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autofs problem on CentOS6
by John Hodrien 15 Jul '11

15 Jul '11

I'm trying to use autofs with Active Directory. This works: autofs_ldap_auth.conf: <autofs_ldap_sasl_conf usetls="yes" tlsrequired="yes" authrequired="yes" clientprinc="nfs/myhost@MYDOMAIN" /> /etc/sysconfig/autofs: LDAP_URI="ldap://domaincontroller1 ldap://domaincontroller2" This also works if I replace the auth with a DIGEST-MD5 from GSSAPI (which gets used by default). Good so far. However, I don't want to explicitly list the domain controllers. Discovering them via SRV records fails to work (even though logging clearly shows it's discovered the correct records). Going via a round-robin DNS target for th LDAP_URI also fails, as I think autofs expects the server to think of itself under the round-robin name, rather than its primary name, which breaks both DIGEST and GSSAPI. Anyone got any pointers on how to make this work, or is just a bug that I should track down? jh

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Re: [CentOS] use of MAILTO variable in crontab
by Mike Burger 15 Jul '11

15 Jul '11

> On Wed, Jul 13, 2011 at 9:10 PM, James B. Byrne <byrnejb(a)harte-lyne.ca> > wrote: >> >> On Wed Jul 13 15:03:40 EDT 2011, Michael Best mbest at pendragon.org >> wrote: >>> Like this: >>> >>> MAILTO=testaddr at harte-lyne.ca >>> 30 2 * * * echo "this should be mailed" >> >> That sets MAILTO for the entire crontab does it not? I want to set >> MAILTO differently for specific crontab entries. Is that possible? >> How is it done? Or do I have to pipe stuff to /usr/bin/mail >> explicitly? >> > > > > Easy: > > > MAILTO="root" > 30 2 * * * echo "this should be mailed to root" > MAILTO="james(a)harte.x.x" > 30 4 * * * echo "this should be mailed to James" > MAILTO="bob" > 30 5 * * * echo "this should be mailed to Bob" > MAILTO="" > 30 6 * * * echo "this should be mailed to no-one" Why not simply do one of the following: 30 6 * * * /path/to/job 2>&1 | mail -s "<job name> output" user at domain .com Or Within the script that runs the job, send the output of the to a file, then cat the contents of the file through mail -s "<job name> output" user at domain.com -- Mike Burger http://www.bubbanfriends.org Visit the Dog Pound II BBS telnet://dogpound2.citadel.org or http://dogpound2.citadel.org To be notified of updates to the web site, visit: https://www.bubbanfriends.org/mailman/listinfo/site-update or send a blank email message to: site-update-subscribe(a)bubbanfriends.org

3 2

use of MAILTO variable in crontab
by James B. Byrne 14 Jul '11

14 Jul '11

I want to do something like this: 30 2 * * * MAILTO=testaddr(a)harte-lyne.ca; echo "this should be mailed" I have searched extensively and from what I have read I believe that this should work. But evidently I misapprehend how cron and MAILTO is supposed to work as my example does not cause any mail to be sent as far as I can determine from maillog. How does one specify unique MAILTOs for different cron jobs where the desired recipient is not the user that runs the cron job? -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Problem with net-install
by david 14 Jul '11

14 Jul '11

Folks I tried the net-install, because my computer has no DVD, only a CD. The system has a USB connected keyboard, and it works just fine accessing the built-in BIOS. However, when I booted the netinstall CD, the initial screen which asks for the type of installation did not respond to the keyboard. I was therefore forced to wait the 30-seconds for the timeout, at which point the install screen showed up and the keyboard worked. I fear that the net-install image may not support USB keyboards, which if so, is unfortunate. The alternate of burning multiple CDs (as I've done with earlier versions) appears unavailable in CENTOS 6. Furthermore, I was never given the choice of using a GUI or text install; I guess the old display device isn't supported in the install system. Not being given any choices of packages during the install (a fact noted in the release notes) resulted, however, a system where a lot of the expected utility programs weren't there.: a) "yum" worked b) No SSH client appeared to exist, nor did YUM know about it. c) Several useful utilities were not there, so they had to be installed via yum. As a result, the process of bringing this system to a usable state consisted of: 1) Burn net-install CD 2) Answer the few questions. 3) For the net-install site, use http://mirror.centos.org/centos/6.0/os/i386 4) When it boots, use yum: yum install ftp perl unzip 5) COMMENT: One of the nice properties of Linux has been that it can be installed and run on "old" hardware. I wonder if this feature is going away. David

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Chroot issue with username to uid
by Trey Dockendorf 14 Jul '11

14 Jul '11

I'm setting up a chroot environment on a shared web server to allow users to modify their web roots within a secure chroot, but am having a problem. Right now when I log in with test accounts I get this... Last login: Thu Jul 14 09:04:14 2011 from .... id: cannot find name for group ID 507 id: cannot find name for user ID 506 [I have no name!@webserver ~]$ I've verified that the UID / GIDs are correct in the chroot's /etc/passwd. Is there possibly something I may have not put in the chroot that is needed for id->name mapping? Here's how I setup the chroot...I'll provide a full write up once I get this last issue fixed... cd /home/ mkdir chroot cd chroot/ groupadd chrootusers useradd treydock usermod -a -G chrootusers treydock mkdir -p ./{dev,etc,lib,lib64,usr,bin,home} mkdir -p ./usr/{bin,libexec} mkdir -p usr/libexec/openssh mknod -m 666 dev/null c 1 3 cp -R /etc/skel home/treydock chown -R treydock:treydock /home/chroot/home/treydock cp /etc/ld.so.cache /home/chroot/etc/ cp /etc/ld.so.conf /home/chroot/etc/ cp -R /etc/ld.so.conf.d /home/chroot/etc/ cp /etc/nsswitch.conf /home/chroot/etc/ cp /etc/hosts /home/chroot/etc/ cp /etc/passwd /home/chroot/etc/ cp /etc/group /home/chroot/etc/ cp /etc/resolv.conf /home/chroot/etc/ cp /etc/bashrc /home/chroot/etc/ cp /bin/vi /home/chroot/bin/ cp /bin/ls /home/chroot/bin/ cp /bin/cat /bin/cp /bin/grep /bin/mkdir /bin/mv /bin/rm /bin/rmdir /bin/bash /home/chroot/bin/ cp /usr/bin/scp /home/chroot/usr/bin/ cp /usr/bin/sftp /home/chroot/usr/bin/ cp /usr/bin/ssh /home/chroot/usr/bin/ cp /usr/bin/vim /home/chroot/usr/bin/ cp /usr/bin/id /home/chroot/usr/bin/ cp /usr/libexec/openssh/sftp-server /home/chroot/usr/libexec/openssh/ cd /usr/local/sbin/ wget -O l2chroot http://www.cyberciti.biz/files/lighttpd/l2chroot.txt chmod +x l2chroot vim l2chroot for i in `ls /home/chroot/bin/`; do l2chroot /bin/$i; done for i in `ls /home/chroot/usr/bin/`; do l2chroot /usr/bin/$i; done l2chroot /usr/libexec/openssh/sftp-server vim /etc/ssh/sshd_config /etc/init.d/sshd restart Here is an example of what is in both my system and chroot /etc/passwd treydock:x:506:507:Trey Dockendorf:/home/treydock:/bin/bash Thanks - Trey

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