LINUX:TMUX

https://youtu.be/l-lcd1MrSLM

tecmint.com/tmux-to-access-multiple-linux-terminals-inside-a-single-console/

https://askubuntu.com/questions/850055/ctrl-b-c-n-w-etc-not-working-in-tmux-console

https://ostechnix.com/tmux-command-examples-to-manage-multiple-terminal-sessions

https://www.networkworld.com/article/3545370/how-to-use-tmux-to-create-a-multi-pane-linux-terminal-window.htm

tmux

ctrl+b     and  Shift+%    :::  Split Vertically

ctrl+b     and  Shift+"     :::  Split Horizontally

Type "exit" from a particular window To kill that window/screen 

ctrl+b     and  d     :::  End Session

for example, to create a new terminal hold ctrl+b and release it then press shift+5 (%)