tmux detach from session

CTRL+B CTRL+B D

(assuming default bindings)

The first CTRL+B is interpreted by your local _tmux_ (because it is the first to see all your keystrokes). The second CTRL+B is a command that causes your local tmux to send a CTRL+B to its active pane; this generated CTRL+B arrives at the remote _tmux_. The D passes through the local _tmux_ unchanged; when it gets to the remote _tmux_ it triggers the `detach` command.

1.  You type CTRL+B.  
    Your local _tmux_ interprets it as the prefix key; nothing is sent to the processes running under the local _tmux_.
2.  You type CTRL+B.  
    Your local _tmux_ has it bound to the `send-prefix` command.
    1.  Your local _tmux_ sends a CTRL+B to the process running in the active pane (_ssh_).
    2.  _ssh_ forwards it (through _sshd_, etc.) to the process running on the remote end (remote _tmux_).  
        Your remote _tmux_ interprets it as the prefix key; nothing is sent to the processes running under the remote _tmux_.
3.  You type D.  
    Your local _tmux_ passes it through normally (since the second CTRL+B finished a full command key sequence for the local _tmux_).  
    Your remote _tmux_ has it bound to `detach-client`; it detaches the active client.

This is the same as when you need to send a CTRL+B to any program running inside a _tmux_ session. If you wanted to send CTRL+B to your normal shell (e.g. because your shell is using Emacs-style editing where CTRL+B is `backward-char` (and you dislike using the arrow keys)) you would need to use CTRL+B CTRL+B to get a single CTRL+B to the shell.

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Source: superuser.com

Tags: detach nested session sessio

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Contributed on Feb 05 2023

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tmux detach from session

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