Perhaps this could help:
It is not installed by default on Ubuntu, but is provided in the repositories.
It is very useful:
ssh to a remote host and type
screen to enter a
Start whatever time consuming task you like, and then press Ctrl+A followed by Ctrl+C to create a new window in the screen session.
This will spawn a new shell where you can do what you want. Create even more windows using the same command.
To switch between two windows quickly, use Ctrl+A followed by Ctrl+A again. As you can see, Ctrl+A puts screen in command mode.
Ctrl+A Ctrl+D will detach from the screen session. You can then disconnect from the host and log in again later and use
screen -dr to resume your session.
To go to a specific
screen window, type Ctrl+A followed by a number.
Screen will exit when all active windows are closed (or the shells within have exited).
I got this from SSH and SFTP sessions.
tmux is an alternative to screen.