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Successful update from CentOS 6.7 to CentOS 6.8, but ...
by Walter H. 30 May '16

30 May '16

Hello, I have several CentOS 6 VMs, I have updated the first one successfully, but there is one thing I miss or I don't like; How do I get the standard console with 80x25 back? this is /boot/grub/grub.conf default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.32-642.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-642.el6.x86_64 ro root=UUID=a27dc9a0-ea3a-497d-a9c3-80c7bbba31fa rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_NO_DM rd_NO_LVM KEYBOARDTYPE=pc KEYTABLE=de config_NO_HZ vga=0x0300 initrd /initramfs-2.6.32-642.el6.x86_64.img I've added 'vga=0x0300' (the same would be 'vga=768'), but this results in 100x37? Thanks for Help, Walter

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Re: [CentOS] centos7 tmpfiles.d deleted outdate files
by Qiang Chen 30 May '16

30 May '16

Hi Jonathan Billings, the `age` can't apply to 'r', only would apply to 'd', 'D', 'x', 'X', etc "The age field only applies to lines starting with |d|, |D|, |v|, |q|, |Q|, |C|, |x| and |X|. If omitted or set to "|-|", no automatic clean-up is done." so, there have good idea if I only want to delete the specific files not all files in that dir? thx. On 2016年05月26日 20:54, Jonathan Billings wrote: > Boxbe <https://www.boxbe.com/overview> This message is eligible for > Automatic Cleanup! (billings(a)negate.org) Add cleanup rule > <https://www.boxbe.com/popup?url=https%3A%2F%2Fwww.boxbe.com%2Fcleanup%3Fkey…> > | More info > <http://blog.boxbe.com/general/boxbe-automatic-cleanup?tc_serial=25540750649…> > > > > On Thu, May 26, 2016 at 03:03:25PM +0800, Qiang Chen wrote: >> Would some one help me for this question? thanks very much. > I would suggest reading the tmpfiles.d man page. > > Use 'd' for the directory, and 'r' for the files you want to remove, > including the age. Something like 'r /path/* - - - 10s'. > -- Best Regards, Chen, Qiang

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Re: [CentOS] centos7 tmpfiles.d deleted outdate files
by Qiang Chen 30 May '16

30 May '16

so, there no method to delete special files that below a directory? such as in the directory [root@chenqiang]# tree . ├── test_10d └── test_20d 0 directories, 2 files [root@chenqiang]# ll total 8 -rw-r--r-- 1 root root 4 5月 20 19:14 test_10d -rw-r--r-- 1 root root 4 5月 10 19:15 test_20d So, I want to delete file test_20d, keep test_10d, how to do that? thx. On 2016年05月27日 02:12, Gordon Messmer wrote: > Boxbe <https://www.boxbe.com/overview> This message is eligible for > Automatic Cleanup! (gordon.messmer(a)gmail.com) Add cleanup rule > <https://www.boxbe.com/popup?url=https%3A%2F%2Fwww.boxbe.com%2Fcleanup%3Fkey…> > | More info > <http://blog.boxbe.com/general/boxbe-automatic-cleanup?tc_serial=25543758553…> > > On 05/24/2016 11:18 PM, Qiang Chen wrote: >> #Type Path Mode UID GID Age Arg >> d /chenqiang 0775 root root 10s >> f /chenqiang/test_10s 0660 root root 10s >> f /chenqiang/test_20s 0660 root root 20s >> ``` >> >> It can delete dir if the age > 10s, but can't delete the files in it. > > > The man page for tmpfiles.d says, of the age field: > "The age field only applies to lines starting with d, D, and x." > > So, the line: > > d /chenqiang/test_10s 0660 root root 10s > > indicates that systemd-tmpfiles should create the directory > /chenqiang/test_10s, owned by root/root with mode 0660, and > periodically clean it of files and empty directories more than 10s old. > > Note that the default configuration runs systemd-tmpfiles once per > day, so specifying time periods much smaller than that may not be useful. > > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > https://lists.centos.org/mailman/listinfo/centos -- Best Regards, Chen, Qiang

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Unable to boot CentOS 6 - Segmentation Erorr
by John Cenile 29 May '16

29 May '16

Hi all, I had an issue this morning with one of my virtual machines. It wouldn't boot (into any runlevel), nor could I chroot into the root partition using a rescue disk. Unfortunately I didn't grab a screenshot, however the error(s) when booting were: /pre-pivot/50selinux-loadpolicy.sh: 14 <other messages> init: readahead main process (425) killed by SEGV signal init: readahead-col lector main process (421) killed by SEGV signal init: rcS pre-start process (425) killed by SEGV signal init: Error while reading from descriptor: Bad file descriptor init: readahead-col lector post-stop process (424) killed by SEGV signal init: rcS post-stop process (427) killed by SEGV signal init: readahead-disable-services main process (428) killed by SEGV signal When using a rescue CD and chrooting into the root partition, I would get : Segmentation Fault: Core Dumped In the end, the fix was to boot into a rescue CD with networking, and SCP the entire contents of /bin and /sbin from another (working) server to the broken installation. This finally allowed CentOS 6 to boot correctly. So I'm left to assume some of the files in /bin *or */sbin were corrupt. My question is, does anyone have any ideas on how this might have happened? I did do a quick memory test using the rescue CD (it didn't complete) and there weren't any errors. The virtual machine is running on VMWare with 3 other VMs, which all seem fine. There wasn't any unexpected power loss either. Thanks.

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CentOS 6.8 Apache-2.2.15-53 re-write question
by Paul R. Ganci 29 May '16

29 May '16

I was wondering if somebody could help me with an Apache re-write rule. Apparently CentOS 6.8 is running apache-2.2.15-53. I am trying to redirect all pages except for two pages. The apache rewrite directives in the httpd config are: RewriteEngine on RewriteCond %{REQUEST_URI}!^/test/ RewriteCond %{REQUEST_URI}!^/my-folder/ RewriteRule (.*) http://www.newdomain.com/$1 [R=301,L] These commands should cause all requests to get re-directed to www.newdomain.com except for those with a /test or /my-folder on the end of the URL. However when I place these commands into the the httpd config apache spits out this error message: Starting httpd: Syntax error on line 31 of /etc/httpd/conf.d/olddomain.conf: RewriteCond: bad argument line '%{REQUEST_URI}!^/test/ I have of course renamed the real config parameters. Can somebody tell me if these directives only work in apache-2.4 and if so how do I do the same thing in apache-2.2? If these directives should work in apache-2.2 is this an apache problem? Thanks for your help. -- Paul (ganci(a)nurdog.com) Cell: (303)257-5208

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what multimedia framework does Centos use
by qw 29 May '16

29 May '16

Hi, My question is : what multimedia framework does Centos use for server purpose? Thanks! B.R. Andrew

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Looking for location of some specific settings in CentOS 6.x
by Walter H. 28 May '16

28 May '16

Hello, I have several virtual machines, all with CentOS 6.x and one so called virtual server at a web hoster my virtual machines (VMware) were all installed manually using the .iso, some exist longer and therefore were originally a CentOS 6.3, some are newer and wer originally a CentOS 6.6; and this virtual server has been installed using a preconfigured image from the web hoster; on all this virtual machines and the virtual server several 'yum update' brought them to same release, not CentOS 6.7, as I havn't updated to 6.8 yet; at the virtual server I find this export LS_OPTIONS="--human --color=always" alias ls='ls $LS_OPTIONS' alias ll='ls $LS_OPTIONS -l' alias l='ls $LS_OPTIONS -Al' in /root/.bashrc on my virtual machines I can't find this settings; nor doesn't 'env' show a variable 'LS_OPTIONS' but 'alias' shows this: alias cp='cp -i' alias l.='ls -d .* --color=auto' alias ll='ls -l --color=auto' alias ls='ls --color=auto' alias mv='mv -i' alias rm='rm -i' alias which='alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde' the aliases for cp, mv, rm are explained by the first part of /root/.bashrc (not quoted above) alias rm='rm -i' alias cp='cp -i' alias mv='mv -i' when I comment out the above shown part of /root/.bashrc on the virtual server 'alias' shows the same as on my virtual machines (VMware) but where are these aliases alias l.='ls -d .* --color=auto' alias ll='ls -l --color=auto' alias ls='ls --color=auto' alias which='alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde' set? Thanks for help, Walter

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Fail to load kernel module ipmi_si on CentOS-6
by Frank Yu 28 May '16

28 May '16

Hi all, I am trying to load kernel module ipmi_si, while failed with error "No such device", truth is I can find file in ../kernel/drivers/char/ipmi/ipmi_si.ko. So why I can't load it? Steps: # ls -l /lib/modules/2.6.32-573.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si.ko -rwxr--r--. 1 root root 93080 Jul 23 2015 /lib/modules/2.6.32-573.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si.ko # modprobe ipmi_si FATAL: Error inserting ipmi_si (/lib/modules/2.6.32-573.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si.ko): No such device # lsmod |grep ipmi ipmi_devintf 7729 0 ipmi_poweroff 8532 0 ipmi_watchdog 17874 0 ipmi_msghandler 38701 3 ipmi_devintf,ipmi_poweroff,ipmi_watchdog # ipmitool Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directory What should I do if I want to setup IPMI on my centos host? -- Regards Frank Yu

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Systemd and VirtualBox
by Rob Kampen 28 May '16

28 May '16

The continuing challenges of getting a workable server continue. The latest spins of VirtualBox seem to have solved the issues of DKMS auto compiles of the driver being aborted. The yum updates work as expected, provided one stops the running vms manually first. However, trying to get systemd to start the vms is proving to be a PITA. I have extensively googled and found that there are no specific instructions for Fedora/Redhat/CentOS and VirtualBox setups for systemd. After many trials and errors I have this systemd service file: filename - /etc/systemd/system/vboxstarter@.service [Unit] Description=VBox Virtual Machine %i Service Requires=systemd-modules-load.service vboxballoonctrl-service.service After=systemd-modules-load.service vboxballoonctrl-service.service Conflicts=shutdown.target [Service] User=<username> Group=vboxusers Restart=on-failure TimeoutSec=5min Environment="VBOX_USER_HOME=/home/rkampen/VirtualBox VMs/%i" ExecStart=/usr/bin/VBoxHeadless -s %i ExecStop=/usr/bin/VBoxManage controlvm %i savestate [Install] WantedBy=multi-user.target and on occasions the invocation systemctl start vboxvmstarter(a)Windoze10_2.service will work, although recently it is failing always with >$ systemctl status vboxvmstarter(a)Windoze10_2.service ● vboxvmstarter(a)Windoze10_2.service - VBox Virtual Machine Windoze10_2 Service Loaded: loaded (/etc/systemd/system/vboxvmstarter@.service; enabled; vendor preset: disabled) Active: deactivating (stop-sigterm) (Result: exit-code) since Tue 2016-05-17 03:25:02 EDT; 4s ago Process: 1987 ExecStop=/usr/bin/VBoxManage controlvm %i savestate (code=exited, status=1/FAILURE) Process: 1906 ExecStart=/usr/bin/VBoxHeadless -s %i (code=exited, status=1/FAILURE) Main PID: 1906 (code=exited, status=1/FAILURE) CGroup: /system.slice/system-vboxvmstarter.slice/vboxvmstarter(a)Windoze10_2.service └─1940 /usr/lib/virtualbox/VBoxSVC --auto-shutdown May 17 03:25:02 media.pcol.org systemd[1]: Started VBox Virtual Machine Windoze10_2 Service. May 17 03:25:02 media.pcol.org systemd[1]: Starting VBox Virtual Machine Windoze10_2 Service... May 17 03:25:02 media.pcol.org systemd[1]: vboxvmstarter(a)Windoze10_2.service: main process exited, code=exited, status=1/FAILURE May 17 03:25:02 media.pcol.org VBoxManage[1987]: VBoxManage: error: Could not find a registered machine named 'Windoze10_2' May 17 03:25:02 media.pcol.org VBoxManage[1987]: VBoxManage: error: Details: code VBOX_E_OBJECT_NOT_FOUND (0x80bb0001), com...pports May 17 03:25:02 media.pcol.org VBoxManage[1987]: VBoxManage: error: Context: "FindMachine(Bstr(a->argv[0]).raw(), machine.a...VM.cpp May 17 03:25:02 media.pcol.org systemd[1]: vboxvmstarter(a)Windoze10_2.service: control process exited, code=exited status=1 Hint: Some lines were ellipsized, use -l to show in full. as <username> a vboxmanage list vms "Windoze10_2" {51c8f956-9aba-4d2a-942c-8f46889d5bc0} shows the required vm. as root or using sudo it returns nothing. thus my only conclusion is that systemd actually runs this as root and ignores the User= line of the [Service] stanza. No idea where to from here, so if there is anyone that has a working systemd autostart VirtualBox setup on a headless CentOS 7 server - please advise what you have done to get it working. Or any systemd gurus that can point me at the specific foo required to beat this deamon into submission. TIA Rob P.S. I deliberately set up the VirtualBox vms under a non privileged user account. I have tried setting up a symbolic link from /root to the ~/username/VirtualBox\ VMs folder and made root a member of the virtualboxusers group - no difference, as expected, but getting desperate.

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Continuous Release repository RPMs now released
by Johnny Hughes 27 May '16

27 May '16

The Continuous Release repository RPMs for CentOS-6.8 are now released. It includes the following releases: https://lists.centos.org/pipermail/centos-cr-announce/2016-May/thread.html Specifically, there are following Security Updates included: CESA-2016:0996 Important CentOS 6 openssl Security Update CESA-2016:0997 Important CentOS 6 qemu-kvm Security Update CESA-2016:1041 Important CentOS 6 thunderbird Security Update CESA-2016:0760 Moderate CentOS 6 file Security Update CESA-2016:0778 Moderate CentOS 6 icedtea-web Security Update CESA-2016:0855 Moderate CentOS 6 kernel Security Update CESA-2016:0780 Moderate CentOS 6 ntp Security Update CESA-2016:0741 Moderate CentOS 6 openssh Security Update As well as more than 300 other bug fix updates. Please read the CentOS-6.8 Release Notes: https://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.8 As well as the RHEL-6.8 release notes and technical notes (since CentOS-6.8 is based on the RHEL-6.8 source code): Release Notes: http://red.ht/1WBF3u4 Technical Notes: http://red.ht/1YwcEDI If you do not want to install the CR repository, the full 6.8 release should happen around 10-21 days from today. For more information on the CR repository, see this link: https://wiki.centos.org/AdditionalResources/Repositories/CR Thanks, Johnny Hughes

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