Linux "Screen" commands (run program while computer is shut down)
Create a screen session: screen
Create a screen session with a name associated with it: screen -S
List screen sessions screen -list
Detach from current screen Press Ctrl-A and then D
Reattach to screen using process ID (pid) screen -r e.g. screen -r 1234
Reattach using a session name screen -r e.g. screen -r mysession
More information about screen options man screen
To kill a screen session screen -S -p 0 -X quit