Kill all tmux windows except one

Much like killing panes¹, use kill-window to kill all windows except the current one:

kill-window -a

To kill all windows except for a specific one, use the -t flag:

kill-window -a -t 0

1. :

   https://unix.stackexchange.com/a/15452:

   kill-pane -a -t 0
   

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