Do you ever need to kick off a long-running command while SSHed to a server, but be able to disconnect and reconnect at will? You can do this with screen.
Before doing anything, start a screen session:
When you’re ready to put your work on hold, detach the screen:
If you have a long-running command running, you can detach that screen from a different shell session by specifying the process id:
# look up the process id ps aux | grep SCREEN # detach that screen screen -d <my_process_id>
You can now disconnect from the server safely.
When you reconnect, you can also reconnect to your screen session: