Question

How can I send the signals of CTRL-A and CTRL-D from a shell script to a screen?
Next code doesnt work to me. Screen process still is running in foreground and I want that it executes in background. Any idea?

#!/bin/sh
#TweetBot notifications with Growl

cd ~/node-tweetbot/
screen -S "tweet" node app.js -X stuff "'^A' '^D'"

Answer 1

You could simply start up screen in detached mode. From the man page:

   -d -m   Start screen in "detached" mode. This creates a new session but
           doesn't  attach  to  it.  This  is  useful  for  system startup
           scripts.

So this:

screen -S tweet -d -m node app.js

Would start up your screen session detached. You could attach to it at a later time by running:

screen -x tweet