2024 update

[wiki.git] / doc / screen.mdwn

diff --git a/doc/screen.mdwn b/doc/screen.mdwn
index b2cd3904c5bdf9cde20cc25798ddc4bf2679c429..9ff6fcd591e82920ae1889bf35918bfd6fdf75f4 100644 (file)
--- a/doc/screen.mdwn
+++ b/doc/screen.mdwn
@@ -6,7 +6,7 @@
 session, whether in a window, via ssh, or by some more esoteric means.
 Its original reason for existence was allowing you to switch between
 subsessions on a [video-display
 session, whether in a window, via ssh, or by some more esoteric means.
 Its original reason for existence was allowing you to switch between
 subsessions on a [video-display

-terminal](http://en.wikipedia.org/wiki/Video_terminal), but it grew to
+terminal](https://en.wikipedia.org/wiki/Video_terminal), but it 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
 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


@@ -14,8 +14,8 @@ from multiple places.
 
 ## Getting Started
 
 
 ## 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.
+ 1.  Pick a machine to run your screen session on.  If you don't know of any options and you're just starting out, you can ssh into athena.dialup.mit.edu (Athena Dialup). This will pick a machine by round-robin; you should be greeted by a prompt that says something like yourkerberos@foobarbaz.mit.edu. foobarbaz.mit.edu will be the machine that you'll host your session on.
+ 2.  ssh to the machine you chose in step 1. Remember it for future reference. If you want a shorter name for foobarbaz.mit.edu you can type `stella foobarbaz` at an Athena prompt; one or several shorter aliases should be listed, such as, hypothetically, `fbb`. On the MIT network, you don't even have to type `.mit.edu`, so you can just `ssh yourkerberos@fbb`.

  3.  run `screen`
  4.  Do stuff.
 
  3.  run `screen`
  4.  Do stuff.
 


@@ -49,15 +49,23 @@ to share context between different screens, or even different people,
 but doing it when you're not sure where else your screen might be
 attached has privacy implications.
 
 but doing it when you're not sure where else your screen might be
 attached has privacy implications.
 

-##Switching Between Screen Sessions
-C-a C-a allows you to switch between screen sessions incrementally. If you have created 3 screen sessions and find your self at the 0th one, then C-a C-a will put you in the 1st screen session, then C-a C-a again will put you in the 2nd one. You can also move around in the screen session by using C-a [index number]. Such that C-a[1] would accomplish the same thing as C-a C-a when you were on the 0th window. 
-
-

 ## For More Information
 
 `screen` can do lots of stuff.  If you have a while to burn, run
 `man screen` at the shell prompt.  It may be helpful to do this
 inside of `screen` so you can put it down and come back to it later.
 
 ## For More Information
 
 `screen` can do lots of stuff.  If you have a while to burn, run
 `man screen` at the shell prompt.  It may be helpful to do this
 inside of `screen` so you can put it down and come back to it later.
 

-## TODO
-clean up, explain the "C-a C-a" notation better. 
+Some people (including the author of this sentence) use `tmux` instead of
+`screen`; it can do all of the same things `screen` can, and may be easier to
+customize.
+
+Also, instead of normal `ssh`, you can use `mosh` (the mobile shell) to connect
+to the Athena machine; it will be able to reconnect automatically if you lose
+your Internet connection momentarily. An example alias:
+
+    alias athmosh='mosh --server="athrun mosh_project mosh-server" --ssh="ssh -K"'
+
+`ssh -K` will pass along Kerberos tickets from your own machine, so if you
+first run `kinit yourkerberos@ATHENA.MIT.EDU` and type your password on your
+computer, you won't need to re-authenticate when running this command. You can
+invoke this as `athmosh yourkerberos@fbb`.