How to attach to a tmux session?

Detailed Explanation

The tmux attach command connects you to an existing tmux session. This is one of tmux's core features - the ability to detach from a session and reattach to it later, even from a different computer or terminal.

Basic attach commands:

• tmux attach or tmux a - Attach to the most recently used session
• tmux attach -t session-name - Attach to a specific session by name
• tmux attach -t 0 - Attach to a session by number

Handling multiple sessions:

If you have multiple sessions, first list them to see which one you want to attach to:

$ tmux ls
0: 1 windows (created Fri May 31 12:34:56 2025) [80x24]
dev: 2 windows (created Fri May 31 14:10:34 2025) [80x24]

Then attach to your desired session:

$ tmux attach -t dev

Additional attach options:

• tmux attach -d - Attach and detach all other clients (useful for screen sharing)
• tmux attach -r - Attach in read-only mode
• tmux attach -c /path - Set the working directory for the session