run same command on multiple tmux panes

If you want to run same command on multiple servers, you can use tmux synchronize-panes feature. This will be useful when you need to setup multiple servers, say install nginx/php/mysql on multiple servers.

You can create multiple panes in tmux. SSH into each of the servers from these panes. Now run

CTRL + B :

Now type

setw synchronize-panes on

Whatever command you run on one of the pane will be executed on all panes. Be careful when you run server specific commands.