edx/configuration — pull request #1648 by jtriley (2014-10-21 15:06:53+00:00)
Title: install tmux debian package in common role

TMUX is a terminal multiplexer similar to GNU screen but with many improvements. See their FAQ for differences/improvements:

http://sourceforge.net/p/tmux/tmux-code/ci/master/tree/FAQ

also:

http://www.techrepublic.com/blog/linux-and-open-source/is-tmux-the-gnu-screen-killer/