http://globecyclette.com/kljaps/807 tmux; The terminal multiplexer. In simple words, it divides a terminal into many sessions, windows and panes. An interesting usage is the session can be detached and re-attached, which is very useful to connect remotely. Because unexpected disconnection does not kill the process running. Also, dividing a terminal window into many panes is convenient when connected through PuTTy to maximize the screen real estate.
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his response http://www.dayid.org/os/notes/tm.html