CTRL-A : screen command mode
CTRL-A ” ” : show list
CTRL-A SHIFT-A : rename this screen session
CTRL-A n : next screen
CTRL-A p : previous screen
CTRL-A M : monitor for activity
CTRL-A _ : monitor for silence
CTRL-A H : keep a running log
$ screen -ls : list screen sessions (useful if more than one session)
$ screen -r : reattach
$ screen -x : connect to already attached screen session (subsequent windows)
