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Using the ACADUNIX machine
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-IAN! idallen@ncf.ca

ACADUNIX is an IBM RISC computer running the IBM version of Unix named
"AIX".  The machine is accessible using "telnet" from most anywhere in the
world.  (I have asked ITS to install "ssh" to make logins more secure.)
You cannot currently connect directly from ACADUNIX to the Linux Lab;
however, you can connect from the Linux Lab to ACADUNIX.

Your account name is your usual Algonquin userid and your initial password
is your PIN number.  You should change your password using the usual Unix
"passwd" command.  If you forget your password, contact ITS at extension
5555.  (Your instructor cannot reset your password.)  ITS limits each
account to only five simultaneous logins into the ACADUNIX machine
(five simultaneous logged in telnet sessions).

The shell you first get when logging in to ACADUNIX is the Korn shell
(/bin/ksh).  This shell is somewhat less powerful than the bash shell
used in Linux, but somewhat more powerful than the original Bourne
shell.  You will note that the arrow keys do not navigate your command
history in the Korn shell.

A copy of the open-source bash shell, version 2, commpiled for AIX
Unix, is available on ACADUNIX by typing "bash" at the shell prompt.
This shell is almost identical to the bash shell running on your Red
Hat Linux systems in the Linux Lab.  The arrow keys work in this shell.

You can automatically start the bash shell upon login by inserting it
into your ".profile" file.

----------------------
The VI and VIM editors
----------------------

The text editor you get by typing "vi" on AIX is the stock Berkeley
version of "vi" distributed with most commercial versions of Unix,
including AIX.  It is *not* the open-source "vim" editor available
under Linux.  Many of the commands are identical; but, many things are
different.  Two important differences are the lack of feedback when you
are in input mode, and the undo command having only one level of undo.

A copy of the open-source vim editor, version 6, compiled for AIX
Unix, is available on ACADUNIX by typing "vim" at the shell prompt.
This version of vim is actually newer than the version of vim running
in the Red Had Linux labs at the moment.

The vim editor starts up in "vi-compatible" mode, which means all the
nice vim features are turned off (the editor behaves much like the stock
"vi" command) unless you explicitly ask for them to be turned back on.

Typing ":help cp-default" in vim will explain how to set "nocompatibility"
mode to get the full vim features you are used to under Linux.

You can create a shell alias to alias "vi" to "vim", or you can write
a small shell script that calls "vim" whenever you type "vi".