Page 1 of 1
Updating CentOS and its effect on Nagios
Posted: Fri Sep 22, 2017 3:14 pm
by snapon_admin
Currently we're sitting on CentOS version 6.5. If I wanted to upgrade that to 6.9 (I believe that's the latest) How would I go about doing that with the most minimal risk to our Nagios install? I apologize for such a generic and likely simple question, but until I took on this project I had almost no Linux experience and even now pretty much all of my current experience has been self taught. Thanks for any assistance you can provide.
Re: Updating CentOS and its effect on Nagios
Posted: Fri Sep 22, 2017 3:16 pm
by scottwilkerson
you should be able to just run the following:
Re: Updating CentOS and its effect on Nagios
Posted: Fri Sep 22, 2017 3:26 pm
by snapon_admin
What's the best way to expand /boot without breaking everything? Says I need 20M more in /boot.
Code: Select all
[root@lisl-ngos-01-pv var]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
197G 164G 23G 88% /
tmpfs 7.8G 0 7.8G 0% /dev/shm
/dev/sda1 97M 83M 9.0M 91% /boot
tmpfs 500M 34M 467M 7% /var/nagiosramdisk
You have new mail in /var/spool/mail/root
Re: Updating CentOS and its effect on Nagios
Posted: Fri Sep 22, 2017 3:52 pm
by scottwilkerson
The easiest thing to do is to remove old unused kernels
Run the following
you will get a list of things like this (yours will vary)
Code: Select all
kernel-2.6.32-358.2.1.el6.i686
kernel-2.6.32-431.23.3.el6.i686
kernel-2.6.32-504.23.4.el6.i686
kernel-2.6.32-573.1.1.el6.i686
kernel-2.6.32-573.18.1.el6.i686
Now to remove the oldest one I can run the following
Code: Select all
yum remove kernel-2.6.32-358.2.1.el6.i686
And this will free space on the root partition.
If you have questions along the way, you can post the output of the command you ran