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Tmux session, with two horizontal and one vertical pane.
Developer(s) Nicholas Marriott
Initial release 2009-09-22
Stable release 2.1 / 18 October 2015; 3 months ago (2015-10-18)
Written in C
Operating system Unix-like
Available in English
Type Terminal multiplexer
License ISC license

tmux is a software application that can be used to multiplex several virtual consoles, allowing a user to access multiple separate terminal sessions inside a single terminal window or remote terminal session. It is useful for dealing with multiple programs from a command-line interface, and for separating programs from the Unix shell that started the program.[1] It provides much of the same functionality as GNU Screen, but is distributed under a BSD license.


tmux includes most features of GNU Screen. It allows users to start a terminal session with clients that are not bound to a specific physical or virtual console; multiple terminal sessions can be created within a single terminal session and then freely rebound from one virtual console to another, and each session can have several connected clients. The features that differentiate tmux from GNU Screen are[2]

  • menus for interactive selection of running sessions, windows or clients
  • window can be linked to an arbitrary number of sessions[3]
  • vi-like or Emacs command mode (with auto completion) for managing tmux[4]
  • lack of built-in serial and telnet clients (which some consider bloat for the terminal multiplexer)[2]
  • easier configuration[5][6][better source needed]
  • different command keys—it is not a drop-in replacement for screen, but can be configured to use compatible keybindings


tmux enjoys wide adoption; it can be found in software repositories of nearly all UNIX-like operating systems[4] and is included in the base system of OpenBSD.[1]

See also[edit]


  1. ^ a b "Keyboard and Display Controls", Snappy Answers to Stupid Questions (OpenBSD), retrieved 7 December 2011  |chapter= ignored (help)
  2. ^ a b Perrin, Chad (25 October 2010), "Is tmux the GNU Screen killer?", TechRepublic, retrieved 7 December 2011 
  3. ^ de Weerd, Paul (12 July 2009), "Interview with Nicholas Marriott on tmux", OpenBSD Journal, retrieved 7 December 2011 
  4. ^ a b "Tmux – the Terminal multiplexer", Linuxaria, 15 September 2011, retrieved 7 December 2011 
  5. ^ O'Higgins, Niall (4 June 2009), tmux, a BSD alternative to GNU Screen, retrieved 7 December 2011 
  6. ^ Alexander, Alex (17 May 2010), "switching from gnu screen to tmux", Linux~ized, retrieved 7 December 2011 

External links[edit]