= Using Screen =

== Why? ==

{{{screen}}} is a handy tool.  It lets you get more out of a terminal session, whether in a window, via ssh, or by some more esoteric means.
It's original reason for existence was allowing you to switch between subsessions on a [http://en.wikipedia.org/wiki/Video_terminal video-display terminal],
but grew to allow sessions that could be detached and reattached (if you went home for the day, or say you were connecting via a glitchy network) and eventually
to allow the same session to be simultaneously accessed from multiple places.

== Getting Started ==

 1.  Pick a machine to run your screen session on.  If you don't know of any options, linux.mit.edu (Linerva) is a good choice.
 2.  ssh to that machine.
 3.  run {{{screen}}}
 4.  Do stuff.

To detach, type "C-a d".  To reattach, type {{{screen -dr}}}

If you close your ssh connection without detaching, or lose your network connection.

 1.  run {{{screen -dr}}}
 2.  Do stuff.

The {{{-dr}}} means "find my screen session, detach it from wherever it's attached if it's attached, and reattach it here."

Once you're comfortable with this, hit "C-a C-c".  This creates what screen calls a new "window"; it should give you a new shell prompt,
and you can do stuff at it.  If you want to switch back to the old "window", hit "C-a C-a".   You can create as many "windows" as you want;  you can
switch to the first 10 of them with "C-a 0" through "C-a 9" and see a list of what's open with "C-a w".

A useful shorthand: {{{screen -dR}}} is like {{{screen -dr}}} except it adds a "if I don't already have a session, create one" step.

You can uses {{{screen -x}}} to attach a screen session