Sorted:

How to view network connection information in Linux?

How to reboot the Ubuntu system?

How to check disk usage on Ubuntu?

How to uninstall a software package in Ubuntu

How to configure a firewall in CentOS?

How to update software packages in the system using the yum command.

How to restart or shut down the CentOS system?

How to set the hostname of CentOS using the command line?

How to install software packages on CentOS?

How to create a new user and grant them sudo permissions