Automatically find and re-attach to a detached screen session

screen -x `screen -ls | grep Detached | cut -c -10`
I alias this as "tach": alias tach='screen -x `screen -ls | grep Detached | cut -c -10`' If you have several detached sessions it will just grab the first one. If you're running nested screens you can open new outer windows and run tach repeatedly to grab all the detached sessions into that one.
Sample Output
<sample output doesn't make sense--screen session gets re-attached>

-3
By: peter4512
2012-03-01 14:13:09

2 Alternatives + Submit Alt

What Others Think

If the screen is already detached, no need to use -x (use to attach to a session which is already attached elsewhere), -r will do the trick.
jlaunay · 570 weeks and 4 days ago
Good point jlaunay.. I use -x as a matter of habit because it always works but in this case there's no need. Btw, downvoters, care to add a comment why the downvote? It's considered polite on stackoverflow, seems fair enough to carry the practice on here. This command does work and if you use lots of nested screen sessions that you're often attaching and detaching you might find it useful. screen -r will attach to a screen session but requires you to specify if you have more than one detached. I find that tedious and would rather attach to all of them in one outer screen session, then decide what to do with them.
peter4512 · 533 weeks and 6 days ago
OK jlaunay I just saw your command screen -RR... seems to do the same thing. I don't know how I missed that in who knows how many passes through 'man screen'. Also, I guess since there's the alternatives mechanism that sort of negates the need to comment with a downvote...
peter4512 · 533 weeks and 6 days ago
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Perfecthomepugs · 14 weeks and 1 day ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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