Screen Begginer Guide

#Update system
sudo apt update

#Install screen
sudo apt install screen

#Create new screen session
screen -S session_name

#List all active sessions
screen -ls

#Re-attach to active session
screen -r session_name

#Kill screen session
screen -S session_name -X quit

#Launch screen session with logging
screen -L -S session_name

#Open screen config
cd
nano ~/.screenrc

#Increase scroll buffer size
#Just add this sctring to config and save(Ctrl-X-Y-Enter)
defscrollback 5000

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#To write logs to specific file
#Press
CTRL+A+:
#enter command
logfile /root/screenlog.log
#Press again
CTRL+A+:
#enter command
log on

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#Useful commands inside screen
Ctrl+A+d - Detach from ongoing screen(process will go on, session will stay)
Ctrl+A+K - Kill ongoing screen(session will be terminated)
Ctrl+A+H - Enable logging from the inside of session
Ctrl+A+[ - Enable scroll mode, scroll with PgUp and PgDown keys (esc/Q to quit scrollig)
Ctrl+A+: - Enter command mode in screen

IMPORTANT! When entering commands below consider register of the letters, use SHIFT bottom to enter upper-register lettes.