$ screen # open screen manager with new window

  ^A c # create new window

  ^A k // kill current window
  ^A :quit // kill all the session (also ^A ^\)

  $ screen -d

  ^A d

  $ screen -list # shows current sessions
  $ screen -r # when only one avaible session is running
  $ screen -r  #  from list of current sessions
  $ screen -r / # multiuser session
  $ screen -d -r  # detach session first

  $ chmod u+s /usr/bin/screen # first time only
  $ chmod 755 /var/run/screen # first time only

  ^A: multiuser on
  ^A: acladd  StHAdPdbENeKq // the 2nd argument is crypted password (created by mkpasswd)

  ^A A // rename current window
  ^A " // list of windows
  ^A S // split current window horizontally
  ^A [0-9] // quick access window #No.[0-9]