Discuss October 2014

discuss@lists.centos.org

199 participants
220 discussions

CentOS 6.6: KVM not found
by Chris 04 Nov '14

04 Nov '14

Dear All, since upgrading from 6.5 to 6.6 I get the following error message when trying to start a VM in virt-manager: Error starting domain: unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules. Qemu-kvm package is installed, kvm module is loaded and virtualization is activated in BIOS. Does anyone happen to know what the issue is? -- Gruß, Christian

4 11

Re: [CentOS] Wow! Double wow!
by Valeri Galtsev 04 Nov '14

04 Nov '14

On Wed, October 29, 2014 9:28 am, Reindl Harald wrote: > > > Am 29.10.2014 um 15:22 schrieb Valeri Galtsev: >> >> On Wed, October 29, 2014 9:06 am, Steve Clark wrote: >>> On 10/29/2014 10:02 AM, Beartooth wrote: >>>> I'm running CentOS 6 (6.5 iirc) on my wife's machine, which I've >>>> been updating pretty much every day. Today yum got 425 packages! >>>> >>>> Somewhere a dam must have broken. Sometimes some of us don't >>>> appreciate how much work the developers do. >>>> >>>> Strength to their arms, and many heartfelt thanks! >>> +100 >> >> Me too. I was [mistakenly, apparently] always considering 5.[n+1], >> 6.[m+1] >> just re-spins, thus providing latest packages with _backported_ security >> patches/bugfixes, aimed at providing installation media that is not >> entail >> millions of updates. "Releases" with newer versions, drivers included in >> kernel shuffled, the new kernel (without any necessity in it) which >> causes >> hassle to reboot the box... This all effectively defeats the >> "Enterprise" >> portion of the name of the system, doesn't it? > > if you think there is no necessity for the new kernel who is forcing you > to reboot? I like that "If" clause of yours... Basically, if one thinks he knows more than system vendor, he is just schizophrenic. And we, normal people, do give schizophrenics a privilege to be on their own. As we, normal people know that if the distro maintainers had to update kernel, they had a reason (otherwise, something else breaks). So, we are left running _this_ system, even though it's stressful, still not as stressful as running "bleeding edge" fedora, right? ;-) Valeri > "enterprise OS" is nothing about never ever reboot, it's > about API/ABI stability > > ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++

11 21

CentOS 6.6 Bacula-SELinux issue
by Paul Heinlein 04 Nov '14

04 Nov '14

I updated my backup server to CentOS 6.6 this morning. As usual, I unmounted the current (nightly) tape from the changer before the reboot. Now Bacula complains it cannot access the changer: 3301 Issuing autochanger "loaded? drive 0" command. 3991 Bad autochanger "loaded? drive 0" command: ERR=Child exited with code 1. Results=cannot open SCSI device '/dev/changer' - Permission denied SELinux is denying source context bacula_t from accessing target context tape_device_t. I took a look at the various SELinux boolean values but see none that applies. Has anyone else observed this symptom since upgrading? Is there a fix other than building a local policy by going through the "ausearch | audit2allow" iteration(s)? -- Paul Heinlein heinlein(a)madboa.com 45°38' N, 122°6' W

2 1

Dell Dimension 2400 W/Intel 845-G Video
by Mark LaPierre 04 Nov '14

04 Nov '14

Hey Y'all, I've been Googeling and experimenting for two days trying to find a way to deal with the Intel 845-G video chipset in this Dell Dimension 2400. First, it doesn't have a DVD drive so I have to install from a CD. When I try to boot into the Live CD I get a video error something like, Undefined video mode number: 317. It hangs at the splash screen. I was able to make a minimal install with the Minimal Install CD. I used yum to update and then install the desktop and X server. I managed to get it to bring up the desktop by adding nomodeset to the grub command line and by using the vesa driver but I can only get 640x480 resolution and the image is offset on the screen to the left and down. I tried a netinstall. It was looking good but the video bug crashed that too. I just swapped out the CD drive with another known good drive. Still no joy. I wasn't expecting that to make a difference so I wasn't disappointed when it didn't. There's a lot a cruft on the internet about problems with the Intel 845-G chipset but no solutions that work for me. Does anyone know how to get an successful installation on this hardware? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

7 15

Centos7 Annoyances
by david 04 Nov '14

04 Nov '14

Folks I'm sure the Centos team has done a yeoman's job getting Centos7 ready, and that the Redhat team has done marvels in creating rhel7, but here's a little voice from a personal hobbyist user. Background: ('ve been maintaining several remote servers since Redhat 6 days, migrating from that to Whitebox, then Centos, and things have been running as expected including the current version of Centos6. As an experiment, I've tried to play with Centos7 on an in-house virtual machine (VMWare on Win7), and have encountered a collection of annoyances greater than I've even seen. Below is a note about them. If someone has some elegant solution, I'd love to try, but Centos7 is still unusable for me. 1: Firewall changes The change in firewall technology forced a complete re-do of my scripts which maintain firewalls, respond to attacks, etc. I think I've programmed my way around the issues, but it wasn't easy. 2: Apache changes These were subtle, but again were solved. 3: Service -> systemd The change from object-oriented view of service: (service httpd restart) to function-oriented (systemctl restart firewall) seems to be unnecessary, and counter to the way stuff is generally done in the modern world. Nonetheless, it was possible to solve that with some adaptive script programming. 4) Something with Unknown lvalue 'ControlGroup' in section 'Service' I don't know what to do with this. I constantly get the diagnostic: [/usr/lib/systemd/system/rtkit-daemon.service:32] Unknown lvalue 'ControlGroup' in section 'Service' and attempts to browse the internet for solutions come across barriers that require some paid subscription to view. This is currently a progress-stopper. The messages I see deal with boinc, which does not show up on my system using "rpm -qa | grep -i boinc". 5) Sendmail is out, postfix is in. This is a huge change, since I had lots of scripts that tailored the Sendmail system for spam protection, dealing with SmartHosts that required SMTP-AUTH and others required weird configurations, etc. Whether this is working yet I don't quite know, but it seems the scripts can accommodate the change. 6) Installation I have no idea why, when using the net-install, one must explicitly turn on the network. It seems unnecessary. 7) Lack of 32-bit support I think I understand this. After all, 32-bit machines may become "unusable" when the clock overflows, but isn't that a few years away, and couldn't some solution be found, even if kludgy? Some of the 32-bit hardware was of very high quality, and still runs perfectly. I'd hate to spend a few hundred dollars each to replace all those systems. 8) And more ... I haven't got a server or desktop running to my satisfaction yet, so I don't yet know what pitfalls await. Any advice would be appreciated. David in San Francisco

16 26

legacy-x
by Negative 03 Nov '14

03 Nov '14

I recently installed Centos 7 on a new desktop, and I intended to put XFCE on it, but I think I made a mistake by choosing the Legacy-X group, and now I'm puzzled as to what I have. I thought my first boot would be into runlevel 3, but I got a gui that looks like an odd mix of Gnome 2 and KDE. The anaconda logs show a group install of gnome-desktop and legacy-x, plus a lot of KDE stuff. The mix looks ok, and handles my dual monitors fine, but there are some prefs that simply don't work -- one important bit is that my monitors mostly (but sometimes) go into power save, and I cannot find an option to do it manually. One option now is to install XFCE, but I don't know how that works. Maybe better to uninstall gnome-desktop and legacy-x and just go with XFCE, and I'll wind up with a coherent environment. Btw, I've tried both Gnome 3 and xfce on an old machine in fedora, and much prefer XFCE. (Luckily, we have choices.) Any guidance?

2 2

lost a lvm after update to Centos6.6
by Johan Vermeulen 01 Nov '14

01 Nov '14

Hello All, the update to Centos6.6 got interrupted on a laptop. I then did this: package-cleanup --cleandupes yum-complete-transaction and remove and reinstall the latest kernel. I now get an error message when booting: /dev/mapper/vg_jvermeulen-lv_home does not exist. I can boot into single user mode and run all commands. in fdisk -l .....lv_home is not listed. How can I re-add this? I do have a backup of this machine. Thanks for any help. Greetings, Johan -- Johan Vermeulen IT-medewerker Caw De Kempen johan.vermeulen(a)cawdekempen.be 0479.82.01.41 Powered by Linux.

2 3

Re: [CentOS] X2go server on Centos7, any success?
by david 01 Nov '14

01 Nov '14

At 03:24 PM 10/31/2014, you wrote: >On Fri, Oct 31, 2014 at 4:36 PM, Les Mikesell <lesmikesell(a)gmail.com> wrote: > > On Fri, Oct 31, 2014 at 4:07 PM, david <david(a)daku.org> wrote: > > > >> > Xfce works from the VMWare console. > >> > >> I installed MATE (no errors reported), and the x2go behavior is unchanged. > >> The /var/log/messages file states > >> /usr/bin/x2goruncommand: launching session with Xsession-x2go mechanism, > >> using STARTUP="mate-session" > >> > >> so at least 'mate' got used, I think. > >> > > > > Hmmm, now mine isn't working either. Maybe an update broke something. > > I'll try from home with a mac client later since that's the last thing > > I remember using that worked. > > > >Looks like something broke between the 4.0.1.15-2.el7 package and the >current x2goserver-4.0.1.18-1.el7.x86_64. I found a box with the >older package that still worked, upgraded just x2goserver and now it >fails too. > >-- Phew. I was afraid it was a problem on my end. So many people have been telling me to "read the manual", or "use this" or "use that". Thanks for confirming my observation. David

3 3

Re: [CentOS] X2go server on Centos7, any success?
by david 31 Oct '14

31 Oct '14

At 01:37 PM 10/31/2014, you wrote: >On Fri, Oct 31, 2014 at 3:21 PM, david <david(a)daku.org> wrote: > > > > I have been unable to get X2go to work on a Centos 7 server. I have tried > > both the out-of-the-box GNOME desktop and the Xfce as well. > >It won't work with Gnome. I believe that is due to the 3d hardware >requirement. MATE from EPEL works, or KDE if you have that >installed. Haven't tried Xfce - if it fails, are you sure it would >work from the console? > > > the X2go client on Win7 works just fine with my Centos6 and Debian servers. > > I found no way to capture the commentary produced by the X2go client. > >I haven't used it that much yet because the windows x2go client has a >conflict with 'synergy' which I run to share the keyboard/mouse with >an adjacent laptop (or sometimes two). So most of the time I'm still >using NX with freenx on Centos6 hosts. But without synergy running >it does work with MATE on the host. > >-- > Les Mikesell > lesmikesell(a)gmail.com >_____________________________________ Les: Xfce works from the VMWare console. I installed MATE (no errors reported), and the x2go behavior is unchanged. The /var/log/messages file states /usr/bin/x2goruncommand: launching session with Xsession-x2go mechanism, using STARTUP="mate-session" so at least 'mate' got used, I think. David

2 2

X2go server on Centos7, any success?
by david 31 Oct '14

31 Oct '14

Folks I have been unable to get X2go to work on a Centos 7 server. I have tried both the out-of-the-box GNOME desktop and the Xfce as well. In both cases, the view from the client is that the screen starts to appear, then goes away. On the server, I see the following messages in /var/log/messages (I have erased the user name and replaced it with XXX). The server is running as a virtual machine on a Win7 system (using VMWare), and the "YYY" mentioned below is the Win7 user. "Goat" is the name of the server. Oct 31 13:10:45 goat systemd: Starting Session 71 of user XXX. Oct 31 13:10:45 goat systemd-logind: New session 71 of user XXX. Oct 31 13:10:45 goat systemd: Started Session 71 of user XXX. Oct 31 13:10:48 goat /usr/bin/x2gostartagent: successfully started X2Go agent session with ID XXX-57-1414786247_stDXFCE_dp32 Oct 31 13:10:52 goat /usr/bin/x2gosetkeyboard: Setting X keyboard according to /home/XXX/.x2go/C-XXX-57-1414786247_stDXFCE_dp32/keyboard Oct 31 13:10:52 goat /usr/bin/x2gomountdirs[8612]: successfully mounted YYY@127.0.0.1:30026/cygdrive/C/Users/YYY/X2GO~1/S-704D~1/spool to /tmp/.x2go-XXX/spool/C-XXX-57-1414786247_stDXFCE_dp32 Oct 31 13:10:52 goat /usr/bin/x2goruncommand: launching session with Xsession-x2go mechanism, using STARTUP="xfce4-session" Oct 31 13:10:53 goat /usr/bin/x2goumount-session[8931]: successfully unmounted "/tmp/.x2go-XXX/spool/C-XXX-57-1414786247_stDXFCE_dp32" As you can see, this particular run was using Xfce. I would appreciate guidance, and yes, I have read the "manual", and also at least one "howto" specific to Centos 7. The version of the x2go server is [root@goat log]# rpm -qa | grep x2go x2goserver-4.0.1.18-1.el7.x86_64 x2goagent-3.5.0.27-1.el7.x86_64 x2goserver-xsession-4.0.1.18-1.el7.x86_64 [root@goat log]# the X2go client on Win7 works just fine with my Centos6 and Debian servers. I found no way to capture the commentary produced by the X2go client. David

2 1

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss October 2014