Running a Job Using Tmux

Is some cases, you might want to run a script that will take some time on a separate machine. You can connect to the machine via SSH and run commands, but if you exit from the SSh session, the terminal session will end, and any long-running command you started will be cancelled by the OS.

Tmux offers a solution to this.

Steps

SSH into the remote machine:

ssh user@remote_host

Start a tmux session:

tmux new -s mysession

Note: You can give a different name to the session than mysession.

Run your long-running command inside the tmux session.

python run_long_script.py

Detach from the tmux session:

Press Ctrl+B, and then press D.

(This will return you to the regular shell but leave the command running.)

Disconnect from SSH:

exit

Later, reconnect and resume the session:

ssh user@remote_host
tmux attach -t mysession

Killing a Session

tmux kill-session -t mysession

References

To learn more, you can visit the following cheat-sheet: https://tmuxcheatsheet.com/