It's pretty easy with tmux (via "tmux send-keys") but you need to consider
unwanted side-effects if the session isn't at a shell prompt awaiting
input. What happens if, say, a command like vim is the foreground task when
you try to execute that command? You're just asking for trouble trying to
do it that way. The only time I use that capability is when I know I'm
establishing a new session and want to do some custom initialization (e.g.,
cd'ing to a particular directory and launching my editor).


On Thu, Feb 6, 2014 at 10:27 AM, Thorsten Kampe
<thorsten@thorstenkampe.de>wrote:

> Hi,
>
> tough question: can I automatically execute a command on reattaching
> a detached byobu (screen or tmux) session?
>
> Every time I login, /etc/motd is displayed. Since I hardly ever log
> out and in, I'd like to have the same functionality when reattaching
> to my detached session. This could be a simple cat /etc/motd kind of
> "autostart".
>
> Thorsten
>
>


-- 
Kurtis Rader
Caretaker of the exceptional canines Junior and Hank