screen-cheatsheet.txt

Basics first
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Starting screen
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Start screen by typing screen and hit enter
Confirm welcome message with space bar

C-a means nothing more than Ctrl-a
This basically makes screen listen to commands, i.e. any following key stroke is your requested action

C-a c  // (c)reates a new window
You type Ctrl-a and then lower c

C-a n  // go to (n)ext window
C-a p  // go to (p)revious window
C-a N  // where N is a number, jumps to that window 
C-a A  // opens a command line to name the current window
C-a "  // opens a window with a full-list of all your windows

Monitoring
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If you set this for a screen you can go to other screens and will see a little notification at the bottom that one of either event has occured

C-a _  // makes the current window listening for 30 seconds of silence
C-a M   // makes the current window listening for activity

Scrolling
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# Enable mouse scrolling and scroll bar history scrolling
termcapinfo xterm* ti@:te@

Titles
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Adding a title for the current window
C-a A  // replace the current name with most likely bash 

Ending screen
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C-a d  // (d)etaches the screen session BUT all the windows are still running, i.e. you are only getting back to your previous shell
Reconnect to that screen session with screen -r

For ending screen completely you have to exit from each window and ultimately from the last remaining screen too

Reconnect screen session
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screen -ls // shows if a session exist
screen -r // reconnects to an existing session

If there is a session but listed attached the previous will fail
You have to run the following with the name you've seen with screen -ls
screen -D -r '1234.somescreensession'