Determine if tmux has a detached session

Question

I'd love to be able to write a script that checked for the presence of a tmux session and attach it, or if no session exists, start a new one. So that I could create a custom command in my .zshrc file, and not have to always check.

Is there a way to check programmatically that I have a tmux screen session running?

score 4 · Accepted Answer · edited May 23 '17 at 12:41

4

There is an answer over on StackOverflow https://stackoverflow.com/questions/3432536/tmux-create-session-if-none-exists

tmux attach || tmux new

edited May 23 '17 at 12:41

Community

1

answered Jan 14 '11 at 15:11

slillibri

1,633
1
9
8

score 1 · Answer 2 · answered Feb 05 '16 at 22:58

1

tmux ls will list running sessions

If you're using this inside a .shrc file or similar with exec I'd recommend

if tmux ls
  exec tmux attach
else
  exec tmux
fi

answered Feb 05 '16 at 22:58

Aaron J Lang

111
2

Determine if tmux has a detached session

2 Answers2