Discuss July 2011

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315 participants
287 discussions

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

1 0

Is anyone using the Orca screenreader?
by John J. Boyer 14 Jul '11

14 Jul '11

Orca is a daemon written in Python and C which presents the contents of a Gnome screen to a blind person in speech or braille. It is on the CentOS 5.6 disks. Has anyone on this list used it? If so, what was your experience? I am developing the BrailleBlaster tactile literacy application. Since I am both blind and deaf, I will be using a braille display. I also need to make sure that the application is usable by other blind people. Thanks, John -- John J. Boyer; President, Chief Software Developer Abilitiessoft, Inc. http://www.abilitiessoft.com Madison, Wisconsin USA Developing software for people with disabilities

1 0

Howto create a VPN connection on desktop (CentOS 6)
by Mark Weaver 14 Jul '11

14 Jul '11

Hi List, I'd like to be able to create VPN connections on my laptop to connect to client locations and I was wondering if someone could point me in the right direction for this information. I've checked on the wiki, but didn't find anything. Info appreciated... -- Mark Weaver Computer Information Systems& Services, Inc. mweaver(a)compinfosystems.com (717) 512-9718

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OT: USB3 drive occasionally not detected
by Timothy Kesten 14 Jul '11

14 Jul '11

Hi Folks, CentOS 5.5 x86_64 Asrock-Board with 2 USB3 plugs. Normally USB3-drive is detected. But occasionaly after "umount" next time this drive or other ones will not be detected. I have to boot the PC - than it works - till next unrecognition. On USB2 plugs all works correct. No messages in /var/log/messages nor dmesg. What happens here? Board failure - or other reasons? Some hints welcome. Timothy

4 12

Asterisk binaries on CentOS version 6
by Kaushal Shriyan 14 Jul '11

14 Jul '11

Hi, Any time line of availability of Asterisk binaries on CentOS version 6. Regards Kaushal

2 1

php-5.3.6 fails on CentOS 5.6 64 bit
by Nguyen Vu Hung (VNC) 14 Jul '11

14 Jul '11

Hello all, # I am quite new to 64 bit Linux I am trying to build php-5.3.6 on CentOS 5.6, 64 bit. When I run ./configure under php-5.3.6, I get the following error: ----- Error ----- If configure fails try --with-jpeg-dir=<DIR> configure: error: libpng.(a|so) not found. ----- Error ----- Though libpng-devel and libjpeg-devel (both i386 and x64 rpms) are installed, it seems that configure could not find them. (I guess) I've fixed the errors by: 1. Adding /usr/lib64 to /etc/so.ld.conf, and 2. Specify jpeg lib dir that configure has to look: ./configure --with-jpeg-dir=/usr So, php 5.3.6 did compile fine but, curiously, I want to ask: 3. Why /usr/lib64 is not in ldconfig by default? 4. Why it is "--with-jpeg-dir=/usr" but not "--with-jpeg-dir=/usr/lib64"? BR, Nguyễn Vũ Hưng

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Gnome System Monitor crashes on Centos 6 x86_64
by Frank Cox 14 Jul '11

14 Jul '11

Has anyone else had this problem? I tried it as a brand new username and it happens every time. Add to panel - System Monitor System Monitor shows up in the panel bar for a split second as a black box, then crashes with the following message: Package: gnome-applets-2.28.0-7.el6 Latest Crash: Mon 11 Jul 2011 03:52:52 PM Command: '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' Reason: Process /usr/libexec/multiload-applet-2 was killed by signal 11 (SIGSEGV) Comment: None Bug Reports: -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER!

3 6

CentOS 6 DVD install "Unable to read group information from repositories"
by Trey Dockendorf 14 Jul '11

14 Jul '11

Tried my first CentOS 6 install on a system currently running 5.6. My attempt was not an upgrade, but a full re-format. I have verified the checksums of the ISO and did the pre-install disk verify and everything checked out. However after the screen for setting up the bootloader I get the following error "Unable to read group information from repositories. This is a problem with the generation of your install tree" With my only options being "Exit Install" and "Retry", but of course "Retry" continues to fail with the same message. Basically I chose the first option in the menu for the DVD, install / upgrade, went through all the settings, did a custom layout for partitioning. I basically told the installer to re-format my ext3 partitions to ext4 and set the mount points for / , /boot and swap. Then after selecting "Next" from the bootloader configuration is when I get the above error. Thanks - Trey

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Discuss July 2011