Tmux is a terminal multiplexer that allows users to easily switch between multiple programs in a terminal, detach programs so they continue running in the background, and reattach programs to different terminals. It can be used to share terminal sessions between users and administer multiple remote servers from one terminal. Tmux has many powerful features but also requires care to configure access controls appropriately when used for screen sharing.

1. Uses of tmux explained (for fun & sysadmin)Stanislas Polu
June 7th 2013
bit.ly/tmux-
explained
Made by nitrogr.am

2. What is a terminal multiplexer?
It lets you switch easily between several
programs in one terminal, detach them (they
keep running in the background) and reattach
them to a different terminal.
And do a lot more.
http://tmux.sourceforge.net

3. tmux
(server)
Unix Domain Socket:
/tmp/tmux-{uid}/default
pts/0 pts/1
@spolu @x1t0
tmux
(screen)
tmux
(screen)
pts/4 pts/5 pts/6
ssh bash vim
TMUX Architecture

5. tmux
(server)
/tmp/tmux-{uid}/default
pts/0
@spolu
tmux
(screen)
pts/4
$ tmux
bash
Starting TMUX
(openpty)

6. tmux
(server)
pts/0
@spolu
tmux
(screen)
pts/4
$
bash
Starting TMUX
pts/5
bash
C-b c
/tmp/tmux-{uid}/default

7. tmux
(server)
pts/0
@spolu
tmux
(screen)
pts/4
$ fsck /dev/md2
bash
Detach - Attach
pts/5
fsck
/tmp/tmux-{uid}/default

8. tmux
(server)
pts/4
$
bash
Detach - Attach
pts/5
fsck
C-b d
pts/0
@spolu
bash
/tmp/tmux-{uid}/default

9. tmux
(server)
pts/0
@spolu
tmux
(screen)
pts/4
$ tmux attach
bash
Detach - Attach
pts/5
fsck
/tmp/tmux-{uid}/default

11. tmux
(server)
/tmp/pair
pts/4
bash
Screen Sharing
pts/0
@spolu
tmux
(screen)
$ tmux -S /tmp/pair
$ chmod 777 /tmp/pair
@spolu

12. tmux
(server)
/tmp/pair
pts/4
$ tmux -S /tmp/pair new
$ chmod 777 /tmp/pair
bash
Screen Sharing
@spolu
pts/0 pts/1
@spolu @x1t0
tmux
(screen)
tmux
(screen)
$ tmux -S /tmp/pair attach
@x1t0

14. #!/bin/sh
alias tmux-shared="tmux -S /tmp/tmux-shared"
tmux-shared new-session -d -s str1
chmod 777 /tmp/tmux-shared
tmux-shared new-window -t str1:1 -n 'str1-1' 'ssh nitrogram@str1-1'
tmux-shared new-window -t str1:1 -n 'str1-2' 'ssh nitrogram@str1-2'
tmux-shared new-window -t str1:1 -n 'str1-3' 'ssh nitrogram@str1-3'
tmux-shared kill-window -t str1:0
tmux-shared select-window -t hawkhost:1
tmux-shared attach -t hawkhost
SysAdmin Trick

15. THIS THING IS POWERFUL, BUT...