screen manager with VT100/ANSI terminal emulation

-l and -ln
     turns login mode on or off (for /var/run/utmp updating).  This  can  also  be  defined  through  the
     "deflogin" .screenrc command.

-i   will cause the interrupt key (usually C-c) to interrupt the display immediately when flow-control is
     on.  See the "defflow" .screenrc command for details.  The use of this option is discouraged.

-s   sets  the  default  shell to the program specified, instead of the value in the environment variable
     $SHELL (or "/bin/sh" if not defined).  This can  also  be  defined  through  the  "shell"  .screenrc
     command.

-t name
     sets  the  title  (a.k.a.)  for  the  default shell or specified program.  See also the "shelltitle"
     .screenrc command.