Tmux

Tmux is an incredibly simple and useful bit of software that lets you;

• Tile multiple terminals into one screen
• Allow you to log in to a running session, which you can detach from (keeping an processes going) and log off.

There are a number of online tutorials for the first point, but below are the basics for the second;

• Install Tmux sudo apt-get install tmux
• Create a new Tmux session tmux new -s [name of session], choose a name that makes sense and you can remember
• You will then be entered into a tmux session to start processes/work
• To leave the session running enter crtl+b then d
• You can now log off and the Tmux session processes will continue running

• To get back onto your Tmux session tmux attach-session -t [name of session] (or tmux attach to go back to the most recent session)
• If you've forgotten what your session was called, you can list all tmux ls
• To close the session, enter the session and exit

That's it. If you want be more advanced, these shortcuts will help;

• Split your current terminal vertically ctrl+b then "
• Split your current terminal horzontally ctrl+b then %
• Move between your panes ctrl+b then [arrow key]
• To resize panes ctrl+b then :, then type resize-pane -[direction] [length] where direction is U,D,L,R (up,down,left,right) and length is in number of lines