El famoso terminal multiplexer (sorry not sorry but screen is a piece of shit).

Sync panels

Sync panels can be quite usefull to do the same tasks on a different set of servers.

tmux.conf file

unbind S
bind S set-windows-option synchronize-panes

How to use it

Typical use case can be updating let's say 3 Debian servers.

  1. start tmux
  2. split in 3, use ssh to connect to the targets1.
  3. use bind prefix + S to activate sync2
  4. apt update && apt upgrade
  5. And voilĂ  !

a dedicated session can be used to automate stuff, more on that later...


by default, Ctrl + b