https://www.rackaid.com/blog/linux-screen-tutorial-and-how-to/
screen
Ctrl
+d
screen -r
Command key: ^A Literal ^A: a
break ^B b only Q
clear C other ^A
colon : pow_break B
copy ^[ [ pow_detach D
detach ^D d prev ^P p ^?
digraph ^V readbuf <
displays * redisplay ^L l
fit F removebuf =
flow ^F f reset Z
focus ^I screen ^C c
hardcopy h select '
help ? silence _