https://opensource.com/article/17/3/introduction-gnu-screen?sc_cid=70160000001290bAAA
http://aperiodic.net/screen/quick_reference
screen Quick Reference
basics
| start a new screen session with session name | screen -S <name> |
| split display vertically | C-a | |
| create new window | C-a c |
| jump to next display region | C-a tab |
| detach | C-a d |
more
| list running sessions/screens | screen -ls |
| attach to session with name | screen -r <name> |
| detach a running session | screen -d <name> |
| change to last-visited active window | C-a C-a (commonly used to flip-flop between two windows) |
| split display horizontally | C-a S |
| lock screen | C-a x |
| remove all regions but the current one | C-a Q |