tmux inside a remote tmux

KansaiRobot

6/12/24, 10:05 AM

What happens if I remote login to a PC start tmux there and from there remote login to another pc and start tmux there?

I did it once, and when dettaching, it dettached from the first tmux.

Is there a way to dettach only from the second one?

1 + 0

ssh

tmux

Score:4

Ubuntu

Artur Meinild

6/12/24, 10:18 AM

This presents an interesting situation. Think of tmux as an extra abstraction layer that interprets your keystrokes (among a decent amount of other stuff).

The problem here is that both tmux instances are probably configured with Ctrl+b as the prefix key. This means only the first instance actually catches the prefix command.

To get around this, configure another key combination than Ctrl+b as the prefix key for either session. In this example, I'll go with configuring Ctrl+f as the prefix key for the second machine (but it could be the other way around).

Add the following to your ~/.tmux.conf on the second machine:

# Set prefix key to C-f
unbind C-b
set -g prefix C-f
bind C-f send-prefix

Now the prefix key on the second machine is Ctrl+f instead of Ctrl+b.

Now, if you press Ctrl+f and then d, you detach from the second tmux session.

And when you press Ctrl+b and then d, you detach from the first tmux session.

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EN: tmux inside a remote tmux

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