Screen is one of my favourite utilities when managing servers - it allows you to use multiple shell windows from a single SSH session and to keep these active even after logging out. It is super useful for monitoring long-running processes.
Installing Screen on CentOS
[ ~]$: yum install screen
Creating a new screen
[ ~]$: screen
Detaching from an active screen
Ctrl-A D
Force detaching from another session
[ ~]$: screen -d
Listing all screens
[ ~]$: screen -ls
Re-attaching to a screen
[ ~]$: screen -ls
There is a screen on:
2257.pts-0.myServer (Detached)
1 Socket in /var/run/screen/S-my_root.
[ ~]: screen -r 2257
Exiting a screen
[ ~]$: exit