screen: Session Name

 
 8.5 Session Name
 ================
 
  -- Command: sessionname [NAME]
      (none)
      Rename the current session.  Note that for 'screen -list' the name
      shows up with the process-id prepended.  If the argument NAME is
      omitted, the name of this session is displayed.
      _Caution_: The '$STY' environment variable will still reflect the
      old name in pre-existing shells.  This may result in confusion.
      Use of this command is generally discouraged.  Use the '-S'
      command-line option if you want to name a new session.The default
      is constructed from the tty and host names.