how to check if screen is working

jonnexen <jonnexen-gM/[email protected]> Mon, 22 Nov 2010 09:24:22 +0100

Newsgroups	gmane.comp.gnu.screen.user
Message-ID	<[email protected]>

Hello,

I'm gonna writing a bash install-script. There I want to make a command 
that checks if screen us running. If it's running the script should be 
going on. If not there should be an error. Any ideas?

best regards, jonnexen

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