Discuss February 2010

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273 participants
231 discussions

very large difference between df and du (10 GB, hard to believe)
by Robert Grasso 02 Feb '10

02 Feb '10

Hello, I have a small server running a tool (RT : perl + mysql + apache) for our support team. I stripped down everything else. The OS is CentOS 4.8. I noticed a difference between df and du which is hard to believe : according to df, I am using 29 GB [root@cedrat-rt ~]$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 33G 29G 2.8G 92% / none 506M 0 506M 0% /dev/shm (there are no other partitions - ok, I could have partitioned it a bit more) but according to du -kshxc /* my largest directory is /var (because of mysql) and the grand total is 19 GB I have a 10 GB difference between both outputs. I verified with tune2fs -l /dev/sda1 (...) Block count: 8703205 Reserved block count: 435160 that is, the ordinary 5% the journal size : debugfs -R "stat <8>" /dev/sda1 yields Size: 33554432 with a block size of 4096, this gives 128 MB I rebooted on the CentOS v4.8 CD #1, started "linux rescue" : mounting /dev/sda1, I get the same 29 GB used e2fsck reports a clean filesystem e2fsck -f does not reports further errors. Does anybody have a suggestion ? Best regards --- Robert GRASSO - System engineer

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Re: [CentOS] Skype and problem with ALSA mixer driver?
by Brent L. Bates 02 Feb '10

02 Feb '10

Sorry about empty message. I accidentally hit the wrong buttons.

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Re: [CentOS] Skype and problem with ALSA mixer driver?
by Brent L. Bates 02 Feb '10

02 Feb '10

-- Brent L. Bates (UNIX Sys. Admin.) M.S. 912 Phone:(757) 865-1400, x204 NASA Langley Research Center FAX:(757) 865-8177 Hampton, Virginia 23681-0001 Email: B.L.BATES(a)larc.nasa.gov http://www.vigyan.com/~blbates/

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knockd rpm for CentOS-5.4
by James B. Byrne 02 Feb '10

02 Feb '10

Is there a recommended knockd package for CentOS-5.4 or do I just pull from the project's web site? Regards, -- *** 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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VNC Questions
by Warren Michelsen 02 Feb '10

02 Feb '10

Fresh install of CentOS 5.4 (and my first experience with CentOS). Following install, the first thing I did was enable desktop sharing so that I can control this new 1U box from my Mac workstation. The VNC client sees this as "Warren's remote desktop" but I'd like it to be more meaningful, as I have other remote desktops. Where in the user settings/prefs do I change the way this VNC server identifies itself? I'd like it to show the host name. Since this installation will eventually go on line as a LAMP Internet server, I'd like my VNC sessions to be encrypted. I saw no place in the account settings for remote desktop to specify this. Finally, I'd like VNC to be functional at boot, before I have logged in, so that I can log in to my user account via VNC. Once configured, this server will be located remotely. Can the VNC server be made to run at loot, rather than at log-in of my account? Can these things be done with the existing standard VNC server or do I have to install something else via yum or some such?

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Re: [CentOS] Passwordless ssh
by Brian Mathis 02 Feb '10

02 Feb '10

On Mon, Feb 1, 2010 at 9:49 PM, Warren Michelsen <Warren(a)mdcclxxvi.com> wrote: > On Mac OS, in order to allow ssh using dsa keys, I would copy > ~/.ssh/id_dsa.pub from my machine into ~/.ssh/authorized_keys of the > target machine. I've created .ssh directories in my account home as > well as in /root and copied the respective keys to authorized_keys > files in each. > > Strangely, I can now ssh as root with no password but my own user > account still prompts for a password. What might be wrong? > > > Interestingly, passwordless root ssh log-in worked while > 'PermitRootLogin' in /etc/ssh/sshd_config was just 'yes' and before I > changed it to 'without-password'. > chmod 700 ~/.ssh chmod 600 ~/.authorized_keys

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Re: [CentOS] Passwordless ssh
by Agile Aspect 02 Feb '10

02 Feb '10

On Mon, Feb 1, 2010 at 6:49 PM, Warren Michelsen <Warren(a)mdcclxxvi.com> wrote: > On Mac OS, in order to allow ssh using dsa keys, I would copy > ~/.ssh/id_dsa.pub from my machine into ~/.ssh/authorized_keys of the > target machine. I've created .ssh directories in my account home as > well as in /root and copied the respective keys to authorized_keys > files in each. > > Strangely, I can now ssh as root with no password but my own user > account still prompts for a password. What might be wrong? > > > Interestingly, passwordless root ssh log-in worked while > 'PermitRootLogin' in /etc/ssh/sshd_config was just 'yes' and before I > changed it to 'without-password'. Check the permission all your top level directories and the .ssh directories and it's files. Basically, group and other writes are forbidden since it would allow other people to change your keys. If you're allowing the use of passwords and keys, then it's just falling back to passwords because the permissions are incorrect. And I presuming the secret key is not encrypted, i.e., you never set a passphrase - hence the root login works without a password since the permissions are correct for key exchange. Also, on Redhat/Centos/Solaris machines, it's PermitRootLogin no or PermitRootLogin yes and not PermitRootLogin without-password There should be separate entry for passwords PermitEmptyPasswords no You have to be barking mad to allow root connections - or any connection - with an empty passwords. Note, this isn't Mac mailing list so your mileage will vary. Without a sshd_config file it's hard to help you. -- Enjoy global warming while it lasts.

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Trying to rebuild srpm from fedora....
by Tom Bishop 02 Feb '10

02 Feb '10

So I am trying to rebuild this source rpm from fedora 10, shutter-0.85.1-1.fc10.src.rpm -its a screen capture application ( http://shutter-project.org/ ) that I have been unable to find in any repos, although it is in the fedora repos. Thought I would give it a go and try to rebuild the rpm, so here is the error that I am getting: + desktop-file-install --delete-original --dir /var/tmp/shutter-0.85.1-1-root-itsupport//usr/share/applications /var/tmp/shutter-0.85.1-1-root-itsupport//usr/share/applications/shutter.desktop Must specify the vendor namespace for these files with --vendor error: Bad exit status from /var/tmp/rpm-tmp.38313 (%install) Anyone have any tips or 2x4 :) to point me in the right direction I would appreciate it, thanks. Oh yeah, running centos 5.4 i386 arch, thanks again.

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Re: [CentOS] Trying to rebuild srpm from fedora....
by Ross Walker 01 Feb '10

01 Feb '10

On Feb 1, 2010, at 5:33 PM, Tom Bishop <bishoptf(a)gmail.com> wrote: > Here is the section of the spec file: > > %{_bindir}/%{name} > %{_datadir}/applications/%{name}.desktop > %{_datadir}/%{name} > %{_mandir}/man1/%{name}* > %{_datadir}/pixmaps/ > %{_datadir}/icons/hicolor/*/apps/%{name}.* > > > it appears to be coverd... Ah, not really, rpmbuild is complainig about: /usr/share/applications/centos5-shutter.desktop It's possible the spec file originally mv'd the file to remove the fedoraX, but since the distro changed the file name changed. You'll need to edit the spec fix. -Ross

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Re: [CentOS] VNC Questions
by Akemi Yagi 01 Feb '10

01 Feb '10

On Mon, Feb 1, 2010 at 12:05 PM, Warren Michelsen <Warren(a)mdcclxxvi.com> wrote: >>Or use "su -" instead of "su" when switching to the root user and you >>will get root's environment, which includes /sbin on the path. > > Ah! This is something I've not run across before. Using "su -" did the trick. CentOS Wiki is (almost) always your good friend :-) http://wiki.centos.org/TipsAndTricks/BecomingRoot Akemi

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Discuss February 2010