Screen is a powerful program that allows your terminal session to use
multiple windows and retain context among multiple logins.

A task bar at the bottom shows: open windows, OS-version, reboot-req,
updates-available, system-load, cpu-info, memory-info, and date/time.

F2    Create a new window    |  F6    Detach from the session
F3    Go to the prev window  |  F7    Enter scrollback mode
F4    Go to the next window  |  F8    View all keybindings
F5    Reload profile         |  F9    Configure screen-profiles
                             |  F12   Lock this terminal
'screen -r'  - reattach      |
'man screen' - complete help |  <ctrl-<esckey>> Escape sequence
