CentOS

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Congratulations, you win this month's prize for the most out of date and discontinued server. That is CentOS 6.5 from 2013 and is 8 years out of date.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 mich 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CentOS 7.7 is way out of date, run yum update to get up to date on 7.9 and resolve a large number of security problems.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...

06:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller X710/X557-AT 10GBASE-T [8086:1589] (rev 02) So, yes, 10GBASE-T will be extremely sensitive to cable quality so make sure you are using good quality CAT7 ones. X710 cards were known for having problems when they were first rel...

I do wish they hadn't decided to name the version after YYMM as 2009 sounds like it's 12 years old :( Please show us the output from lspci -nn | grep -i net so we can see the exact model of network card that you have in the machine. Also, check in /var/log/messages for things that may relate to the ...

All looks good to me. You can't merge them since /dev/sda5 is sitting between the two partitions. The best you can do is to use a 2nd partition as a 2nd PV and use that as part of the same VG. In an ideal world you'd move everything around to consolidate the space into one lump but sometimes it's ju...

What is the output from file -s /dev/sda4 ? It may be as simple as using [/tt]pvcreate /dev/sda4[/tt] to turn that partition into an LVM PV and then using the vgextend command to add that new PV to the existing Volume Group and, once that's done, use lvresize -r on the filesystem you want to resize....