Hi,

OS: CentOS 6.8

I am preparing system for freepbx installation and package dahdi needs kernel headers and devel packages. But when I try to install kernel-headers and devel packages then system says they are already installed and latest. Upon checking I found that kernel version and headers version is different

[root@voip ~]# rpm -qa | grep -i kernel
abrt-addon-kerneloops-2.0.8-40.el6.centos.x86_64
kernel-firmware-2.6.32-642.6.1.el6.noarch
kernel-2.6.32-642.6.1.el6.x86_64
libreport-plugin-kerneloops-2.0.9-32.el6.centos.x86_64
dracut-kernel-004-409.el6_8.2.noarch
kernel-headers-2.6.32-642.6.1.el6.x86_64

[root@voip ~]# uname -a
Linux voip.secureserver.net 2.6.32-042stab092.3 #1 SMP Sun Jul 20 13:27:24 MSK 2014 x86_64 x86_64 x86_64 GNU/Linux
[root@voip ~]#

[root@voip ~]# yum install kernel-headers
Package kernel-headers-2.6.32-642.6.1.el6.x86_64 already installed and latest version
(same is with kernel-devel.)

[root@voip ~]# ls -l /boot/
total 31752
-rw-r--r-- 1 root root 108107 Oct 4 17:41 config-2.6.32-642.6.1.el6.x86_64
drwxr-xr-x 3 root root 4096 Oct 11 00:36 efi
drwxr-xr-x 2 root root 4096 Mar 22 2016 grub
-rw------- 1 root root 25282851 Oct 11 00:40 initramfs-2.6.32-642.6.1.el6.x86_64.img
-rw-r--r-- 1 root root 215530 Oct 4 17:41 symvers-2.6.32-642.6.1.el6.x86_64.gz
-rw-r--r-- 1 root root 2618532 Oct 4 17:41 System.map-2.6.32-642.6.1.el6.x86_64
-rwxr-xr-x 1 root root 4269008 Oct 4 17:41 vmlinuz-2.6.32-642.6.1.el6.x86_64

System has cpanel and related libraries also installed . Can someone please shed some light on it that why its like this? I have googled around but haven't found a solution.

Many Thanks.

You're not running a CentOS kernel, and you appear to be running on an OpenVZ VM. Contact your VPS provider.

Yes I also suspect its openvz but running "cat /etc/redhat-release" shows it as Centos 6.8. Please see below.

[root@voip ~]# cat /etc/redhat-release
CentOS release 6.8 (Final)

Why is there difference in kernel versions shown by both commands.. what kind of support to be expected from provider?
Thanks.

You may be running CentOS, but you're not running a CentOS kernel, so of course the headers won't match. You're running a kernel provided by your VPS provider. Figure out how to run a CentOS kernel and/or ask your provider for help.

What makes you think not matching the version is a bad thing?

Why not just update your machine to the current kernel, and re-boot?

https://www.liquidweb.com/kb/how-to-...entos-red-hat/

https://www.unixmen.com/install-late...el-centos-6-7/

@AluCardZero: I don't think not matching kernel is a bad thing but when I install kernel-headers, it always installs for kernel-2.6.32-642.6.1.el6.x86_64 while it is expected to be installed for 2.6.32-042stab092.3. Now that is the only issue I have with mismatching kernels.

@Ztcoracat: I have already tried first link and tried updating kernel with yum update kernel but its not working. However I will try your second link and get back to you incase of any query.

Thank you guys for helping me out here.

Tried the second link but still same issue. Imported and installed key and repo fine but when I issue the command to install kernel, it says

Package kernel-2.6.32-642.6.1.el6.x86_64 already installed and latest version while uname shows kernel as
[root@voip ~]# uname -a
Linux voip 2.6.32-042stab092.3 #1 SMP Sun Jul 20 13:27:24 MSK 2014 x86_64 x86_64 x86_64 GNU/Linux


I want to update this kernel 2.6.32-042stab092.3....

I have downloaded required kernel headers and devel packages from http://opennodecloud.com/CentOS/6/opennode/

but when I install them they give warning warning: vzkernel-devel-2.6.32-042stab092.3.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID a7a1d4b6: NOKEY .. It looks like they are no longer compatible with CentOS 6 and I have to update kernel and its headers+devel packages.

strange thing is that both devel and headers are shown as installed but still not listed by yum.

[root@voip src]# rpm -qa | grep -i kernel
abrt-addon-kerneloops-2.0.8-40.el6.centos.x86_64
vzkernel-devel-2.6.32-042stab092.3.x86_64
kernel-firmware-2.6.32-642.6.1.el6.noarch
kernel-2.6.32-642.6.1.el6.x86_64
libreport-plugin-kerneloops-2.0.9-32.el6.centos.x86_64
vzkernel-headers-2.6.32-042stab092.3.x86_64
dracut-kernel-004-409.el6_8.2.noarch


[root@voip src]# yum list kernel-headers
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
* base: centos.mirrors.hoobly.com
* elrepo: mirrors.evowise.com
* epel: mirror.prgmr.com
* extras: mirror.supremebytes.com
* ius: mirrors.kernel.org
* updates: mirrors.evowise.com
Available Packages
kernel-headers.x86_64 2.6.32-642.6.1.el6 updates

Any thoughts?

I have added vzkernel repo and installed latest stable kernel

---> Package vzkernel.x86_64 0:2.6.32-042stab117.16 will be installed


strangly I have only splash.xpm.gz in /boot/grub folder

I have skipped DAHDI installation as it was the one who needed sources.

Look in /boot and see if the matching kernel is there. If it is, then update the grub files to include it in the grub menu. Then, when you boot, use the matching kernel. Or you might need to manually configure grub if centos still uses grub1.

Depending on how many partitions you set up ie /root, /boot, /home and /swap......
Check that /etc/fstab/ is using the right partition.

OpenVZ host provides/shares the kernel with its guest VMs. Any kernel you installed will be comletely ignored by your VM.