Tmux Cheat Sheet

Introduction

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Since the VM provided for the Programming 1 course requires a Cloudflare tunnel setup for connection
(If interested, you can see my Cloudflare-tunnel setup process)

I wanted to use tmux to keep the tunnel running in the background
and to check the tunnel’s status at any time

tmux Concepts

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tmux can be divided into three levels

1. Session
2. Window
3. Pane

Session

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Session is the highest level in tmux
You can think of it as a workspace in tmux
A session can have multiple windows

Window

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Window is the second level in tmux
You can think of it as different windows within a session
A window can have multiple panes

Pane

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Pane is the third level in tmux
You can think of it as different split screens within a window
A pane can only have one shell
Panes in the same window can be split horizontally or vertically

(This is how it can be split)

Common tmux Commands

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If you are in tmux, you can press Ctrl + b to enter tmux command mode
(Just like pressing : in vim)

Session

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From the command line:

• tmux new -s <session-name> : Create a new session named <session-name>
• tmux ls : List all available sessions
• tmux attach -t <session-name> : Attach to a session named <session-name>

In tmux:

• Ctrl + b + d : Detach from the tmux session
  This does not close the session; it just detaches
  The programs in the session will continue to run!!!
• Ctrl + b + s : List all available sessions

  

Window

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• Ctrl + b + c : Create a new window
• Ctrl + b + n : Switch to the next window
• Ctrl + b + p : Switch to the previous window
• Ctrl + b + w : List all available windows

Pane

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Splitting panes:

• Ctrl + b + % : Split the screen vertically (left/right split)
• Ctrl + b + " : Split the screen horizontally (top/bottom split)
• Ctrl + b + x : Close the current pane

Resizing panes: You can first press Ctrl + b then : to enter tmux command mode
Then type resize-pane (you can use Tab for auto-completion)
Then add -U (up) -D (down) -L (left) -R (right)
Followed by a number to adjust the size of the pane

Switching between panes:

• Ctrl + b + <arrow-key> : Switch to the specified pane
• Ctrl + b + q : Display a number on each pane
  • Ctrl + b + q + <number> : Switch to the specified pane