CentOS

Mariadb is a fork of mysql so many thing in it still refer to mysql and probably always will.

I'd wait and find out where your disk space has gone before you uninstall anything. And I use a slightly different command to track down used space (run as root): du -m -x -d 1 / | sort -n That lists the top level directories on the / filesystem with the ones at the bottom that use the most space. I...

There is a Fedora bug entry for the message that is issued that says it's a problem in the RH patches they add to the kernel. I suspect they've helpfully backported the same bug to the RHEL kernels. Since RH have basically abandoned CentOS Linux 8, I would suggest that you test using CentOS Stream a...

We do not support any control panels. You need to ask the people that supply it.

Moved to the CentOS 7 forum since the OP clearly states that they are running 7 not 8.

It was caused while playing around on installing cPanel. Firefox suddenly collapsed. I have contacted cPanel Forum without result We do not support cpanel systems for precisely those reasons. They change the group and permission on the su executable so that only people in that selected group can ru...

man lvresize

Make sure you use lvresize -r to resize the filesystem at the same time as the LV.

Congratulations, you win this month's prize for the most out of date and discontinued server. That is CentOS 6.5 from 2013 and is 8 years out of date. Since all of CentOS 6 went completely EOL in November 2020, you should look at running up a new machine on something much much newer and migrate to i...

CentOS 7.7 is way out of date, run yum update to get up to date on 7.9 and resolve a large number of security problems.

What is the output from the locale command?

Neither of those are CentOS kernels unless you have a typo in their names. The solution will be to boot the working one and then yum reinstall kernel\*-4.18.0-193.19.1.ek8_2.x86_64 (though you need to fix the typo if it is one). Also, both of them are very old and indicate that you have not been kee...