Question

I want to make a bash script that echo’s something into one of the screens that I have running (screen -r is how I get to it in SSH).

I was wondering how I would make the script execute itself in screen -r?

I basically just want the script to say something on a minecraft server through the console and would set up a cronjob to say it every x minutes.

Cheers,

Answer 1

You can use the -X option of screen to send commands to a running screen session.
Also the -p option is useful in this case, as you can use it to preselect a window

As an example you can run a script in a running screen session on windows 0 via:

 screen -p 0 -X stuff './fancy_script.sh^M'

Note, that you have to append the return key-code to execute the script.