How to delete a detached tmux session?

Question

I detached myself from a tmux session:

$ tmux ls
0: 1 windows (created Thu Aug 22 22:52:17 2013) [218x59]

Is there anyway I can simply delete it now that I am detached from it?

Answer 1

You want to use tmux kill-session:

<~> $ tmux ls
0: 1 windows (created Sat Aug 17 00:03:56 2013) [80x23]
2: 1 windows (created Sat Aug 24 16:47:58 2013) [120x34]

<~> $ tmux kill-session -t 2

<~> $ tmux ls
0: 1 windows (created Sat Aug 17 00:03:56 2013) [80x23]

Answer 2

If you want to delete all the detached sessions you can use the following code:

tmux list-sessions | grep -E -v '\(attached\)$' | while IFS='\n' read line; do
    tmux kill-session -t "${line%%:*}"
done

This solution is more robust than the one proposed by abieler because grep -E -v '\(attached\)$' matches only the detached sessions (the solution by abieler would skip a detached session called attached).

Answer 3

If you want to kill all detached sessions

tmux list-sessions | grep -v attached | cut -d: -f1 |  xargs -t -n1 tmux kill-session -t

With comments/explanation:

tmux list-sessions   | # list all tmux sessions
  grep -v attached   | # grep for all lines that do NOT contain the pattern "attached"
  cut -d: -f1        | # cut with the separator ":" and select field 1 (the session name)
  xargs -t -n1       ` # -t echoes the command, -n1 limits xargs to 1 argument ` \
  tmux kill-session -t # kill session with target -t passed from xargs