Offensive Security Certified Professional (OSCP) video series by Ahmed:
to deal with processes, send them to the background, kill them and restore them back.

00:00 - Managing Processes
02:16 - jobs command
03:06 - catching process (fg)
03:41 - Ctrl + z & bg
05:23 - nohup
09:09 - disown
11:40 - PID numbers
13:00 - Signals in linux
18:28 - Killing process