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Sessions
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$ tmux                                start a new session
$ tmux new                            start a new session
$ tmux new-session                    start a new session
: new                                 start a new session

$ tmux new -s mysession               start a new session with the name mysession
: new -s mysession                    start a new session with the name mysession

$ tmux kill-ses -t mysession          kill/delete session mysession
$ tmux kill-session -t mysession      kill/delete session mysession

$ tmux kill-session -a                kill/delete all sessions but the current

Ctrl + b $                            rename session

Ctrl + b d                            detach from session

: attach -d                           detach others on the session (Maximize window by detach other clients)

$ tmux ls                             show all sessions
$ tmux list-sessions                  show all sessions
Ctrl + b s                            show all sessions

$ tmux a -t mysession                 attach to a session with the name mysession
$ tmux at -t mysession                attach to a session with the name mysession
$ tmux attach -t mysession            attach to a session with the name mysession
$ tmux attach-session -t mysession    attach to a session with the name mysession

Ctrl + b w                            preview session and window

Ctrl + b (                            move to previous session

Ctrl + b )                            move to next session

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Windows
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Ctrl + b c                 preview session and window

Ctrl + b ,                 rename current window

Ctrl + b &                 close current window

Ctrl + b p                 go to previous window

Ctrl + b n                 go to next window

Ctrl + b 0 ... 9           switch/select window by number

: swap-window -s 2 -t 1    reorder window, swap window number 2 (src) and 1 (dst)

: swap-window -t -1        move current window to the left by one position

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Panes
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Ctrl + b ;                     toggle last active pane

Ctrl + b %                     split pane horizontally

Ctrl + b "                     split pane vertically

Ctrl + b {                     move the current pane left

Ctrl + b }                     move the current pane right

Ctrl + b up-arrow              switch to pane to the direction
Ctrl + b down-arrow            switch to pane to the direction
Ctrl + b right-arrow           switch to pane to the direction
Ctrl + b left-arrow            switch to pane to the direction

: setw synchronize-panes       toggle synchronize-panes (send command to all panes)

Ctrl + b Spacebar              toggle between pane layouts

Ctrl + b o                     switch to next pane

Ctrl + b q                     show pane numbers

Ctrl + b q 0 ... 9             switch/select pane by number

Ctrl + b z                     toggle pane zoom

Ctrl + b !                     convert pane into a window

Ctrl + b + up-arrow            resize current pane height (holding second key is optional)
Ctrl + b Ctrl + up-arrow       resize current pane height (holding second key is optional)
Ctrl + b + down-arrow          resize current pane height (holding second key is optional)
Ctrl + b Ctrl + down-arrow     resize current pane height (holding second key is optional)

Ctrl + b + right-arrow         resize current pane width (holding second key is optional)
Ctrl + b Ctrl + right-arrow    resize current pane width (holding second key is optional)
Ctrl + b + left-arrow          resize current pane width (holding second key is optional)
Ctrl + b Ctrl + left-arrow     resize current pane width (holding second key is optional)

Ctrl + b x                     close current pane

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Copy mode (vi mode)
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: setw -g mode-keys vi   use vi keys in buffer

Ctrl + b [               enter copy mode
Ctrl + b PgUp            enter copy mode and scroll one page up

q                        quit mode

g                        go to top line
G                        go to bottom line

up-arrow                 scroll up
down-arrow               scroll down

h                        move cursor left
j                        move cursor down
k                        move cursor up
l                        move cursor right

w                        move cursor forward one word at a time
b                        move cursor backward one word at a time

/                        search forward
?                        search backward

n                        next keyword occurance
N                        previous keyword occurance

Spacebar                 start selection
Esc                      clear selection
Enter                    copy selection
Ctrl + v                 toggle selection mode: line <-> rectangle

Ctrl + b ]               paste contents of buffer_0

: show-buffer            display buffer_0 contents

: capture-pane           copy entire visible contents of pane to a buffer

: list-buffers           show all buffers

: choose-buffer          show all buffers and paste selected

: save-buffer buf.txt    save buffer contents to buf.txt

: delete-buffer -b 1     delete buffer_1

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Misc
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Ctrl + b :          enter command mode

: set -g OPTION     set OPTION for all sessions

: setw -g OPTION    set OPTION for all windows

: set mouse on      enable mouse mode

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Help
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$ tmux list-keys    list key bindings(shortcuts)
: list-keys         list key bindings(shortcuts)
Ctrl + b ?          list key bindings(shortcuts)

tmux info           show every session, window, pane, etc...