Keep processes running and closing SSH connection

The are several alternatives. Here we cover nohup and tmux.

Using nohup

$ nohup long-running-command &

It logs stdout to nohup.log.

Using tmux

1) SSH into the remote machine.

2) Install tmux:

$ apt install tmux

3) Start tmux:

$ tmux

4) Start the process you want inside the started tmux session.

5) Leave/detach the tmux session by typing Ctrl+b and then d.

6) You can now safely log off from the remote machine, your process will keep running inside tmux.

7) When you come back again and want to check the status of your process you can attach to your tmux session using:

$ tmux attach

If you want to have multiple sessions running side-by-side, you should name each session using Ctrl+b and $.

You can get a list of the currently running sessions using:

$ tmux list-sessions

or

$ tmux ls

To attach to a running session with use:

$ tmux attach-session -t <session-name>