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Unix Tutorial
Computer Account Setup
All computer-related work is done in the Thornton E225 lab.
Other options are to use any other Unix lab
(e.g. in the Albert H. Small building), or PCs in the stacks
using Exceed to log into Unix, but you will get less
support if problems arise. The CLASS Machines are a cluster of
Sun Unix Workstations running Solaris.
The host names for the CLASS machines are:
hazeltop.ee.Virginia.EDU
skyland.ee.Virginia.EDU
rivanna.ee.Virginia.EDU
millcreek.ee.Virginia.EDU
LOGGING IN FROM A SPARCSTATION IN E225
At the CDE (Common Desktop Environment) login window do not yet
type your login id (because the
default login is not on one of the 4 above). First click on
Options -> Remote Login -> Enter Host Name and
then enter one of the above 4 host names. Only then, at the new
login window finally type your login id (same
as your email id, e.g. mmt4q) followed by ENTER and then type
your password, followed by ENTER.
If asked what interface to use we recommend you choose CDE. If
you ever want to change your login
"session" you may do so by selecting the OPTIONS button on the
login window and choose a session listed
in the Sessions Menu (CDE, OpenWindows, Startx/X11).
SETTING UP YOUR DESKTOP
Once logged-in you need to setup your desktop. Some useful icons
to have on your desktop are "Xterm" and
"Xterm Ssh"
To put the "Xterm" icon on your desktop: click once on the File
Drawer icon on the toolbar at the bottom of
the screen (third icon from the right) double click on the
Desktop Tools icon scroll down through Desktop
Tools until you see the "Xterm" icon click once on the "Xterm"
icon and drag the icon to the desktop this is a
terminal window to the CLASS machine you're logged on. you can
open as many of these windows/terminals
as necessary
To put the "Xterm Ssh" icon on your desktop: click once on the
File Drawer icon on the toolbar at the
bottom of the screen (third icon from the right) double click on
the EE Tools icon click once on the "Xterm
Ssh" icon and drag the icon to the desktop this icon opens a
terminal to the remote host machine you would
like to log-on to (such as blue.unix.Virginia.EDU). Ssh is a
secure way to log into a remote host. you can
open as many of these windows/terminals as necessary.
CHANGING YOUR PASSWORD
It is VERY IMPORTANT to change your password the first time you
login to any CLASS machine. Open
an "Xterm" window and type the following at the prompt:
passwd
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The screen will then prompt you to enter your "current" password
- do so and press ENTER. Then the screen
prompts you to enter your "new" password Since "passwd" uses
ITC's encryption software, we suggest you
use your blue.unix account password or another encrypted
password you already have. Your login id and
password work on any of the CLASS machines. If you are
registered (or have been in the past) in other
classes that use the class machines (e.g. ECE435/ECE436) you
already have an account and no new account
will be created for the VLSI class (you use the same password).
Similarly, if you already have a Unix account
with the ECE dept. (not blue.unix which is with the University)
this existing account will be linked to the class
machines (you use the same password).
LOGGING IN FROM EXCEED ON A NETWORKED PC (not recomended but you
are welcome to try,
limited support available) From the PCs in THORNTON STACKS:
Double Click on the Exceed shortcut and choose one of the 4
CLASS host names above from the "chooser"
list that appears.
From your PC at home or in a dorm:
You need to change the Exceed configuration (for example on your
personal PC): open Xconfig under theExceed menu then double click
on the Communication icon.
You can either set Exceed to directly login to one machine
(choose "query" and then the "configure" button
and type the hostname of the machine you want to always connect
to (e.g. hazeltop.ee.virginia.edu), or
You can set Exceed to bring up a chooser list of different
machines (choose "broadcast" and then the
"configure" button and put an X in the "hostfile" box and "edit"
the file xdmcp.txt with the names of the hosts
you want to appear in your list (e.g. hazeltop.ee.virginia.edu,
skyland.ee.virginia.edu, etc.)
The Cadence software has an annoying screen/refresh problem when
run on a PC via Exceed. You need todo the following in order to
solve the problem:
Under Xconfig -> Performance.
1. Enable Save Unders
2. Enable Change Maximum Backing Store to Always
3. Alter Default Backing Store to When Mapped
4. Alter Minimum Backing Store to When Mapped
You have to exit Exceed for the changes to take effect.
SETTING YOUR ENVIRONMENT UP FOR CADENCE AND ADDITIONAL TOOLS
For more info on UNIX commands and different UNIX editors drop
by 235 Wilson Hall for some handouts
from ITC or check the following on-line resources:
"UNIXhelp for Users", developed at University of Edinburgh,
"UNIX is a four-letter word", written by Chris Taylor, an
electrical engineering student at Purdue
University.
If you have problems with your CLASS account please send email
to [email protected]
Congratulations, this is the end of the Unix tutorial.
http://unix.t-a-y-l-o-r.com/http://www.mcsr.olemiss.edu/unixhelp/
