15-213 Introduction to Computer Systems
Intel has donated 25
Pentium III Xeon servers to CMU for systems courses. The systems,
which run the Red Hat 6.2 distribution of Linux (version 2.2.16), are
rack-mounted in the Wean Hall 3rd floor machine room, and are
administered by the CS facilities group. They are rebooted every morning
Quick Start Login
While logged in to an Andrew machine (telnet linux.andrew)
and in the home directory of your Andrew account:
- unix> /afs/cs/academic/class/15213-s05/bin/checkin (very first time only)
- unix> ssh -1 -l bovik@ANDREW.CMU.EDU chum.cmcl.cs.cmu.edu
then type your Andrew password to the prompt
The uppercase 'ANDREW.CMU.EDU' is significant.
If you can't login, please read the rest of this document first, and
if things still aren't working, send mail to your instructor, fp@cs.
Information about the CS computing environment is at
If you are having trouble logging in, and your questions are
not answered below, please send mail to your instructor, fp@cs.
Frequently Asked Questions
- Q: How do I get an account?
- A: Accounts will be created for you automatically.
If you are not on the list, please request an account from
your instructor, fp@cs.
- Q: What do I need to do before logging in for the very
- A: From your Andrew home directory on one of the Andrew
Unix cluster machines (linux.andrew.cmu.edu or
run the following one-time checkin script:
Important: Before you run this script, make sure you do not
have any subdirectories in your Andrew home directory called
15-213 or 213hw. If you do, rename them
before running the checkin script.
- Q: What does the checkin script do?
- A: It creates two subdirectories in your Andrew home
directory: 15-213 and 213hw.
The 15-213 directory contains the .klogin
and .login files that will allow you to login from the fish
Important: Do not delete anything in this subdirectory.
The 213hw directory contains secure subdirectories for each of
the labs, with the permissions set so that only you can read
Remember, you only need to run the checkin script once, before your
very first login to the fish machines.
- Q: How do I log into one of these machines once I have run the
- A: From your home directory on an Andrew Linux or Unix machine
(e.g., linux.andrew or unix.andrew),
if your Andrew login is bovik and you want to login
to the fish machine called chum.cmcl.cs.cmu.edu,
then login as follows:
unix> ssh -1 -l bovik@ANDREW.CMU.EDU chum.cmcl.cs.cmu.edu
[type your Andrew password to the prompt]
Notice that the uppercase 'ANDREW.CMU.EDU' is significant.
That's -1 (dash one) followed by a -l (dash
el). For some SSH clients you must explicitly specify -1
to request the SSH version 1 protocol. With some clients, you may
be able to login without the -1:
unix> ssh -l bovik@ANDREW.CMU.EDU chum.cmcl.cs.cmu.edu
[then type your Andrew password to the prompt]
- Q: I did everything you said but I still can't login. Now what?
- A: Here are the most common reasons students can't login:
If you still cannot log in, contact the instructor, fp@cs.
Fish Machines That Are Available to Students
Intel engineers traditionally use the names
of North American rivers as internal names for their processor
projects. So it seems fitting that we, as denizens of the Intel
cluster, name the machines after freshwater fish of North America.
Fish Machines Available to Teaching Staff Only
About the Intel Cluster
The machines in the Intel Cluster are connected by a Cisco 3524 switch
with 24 full-duplex 100 Mb/s ports and 2 full-duplex 1 Gb/s ports. The
switching fabric has a peak bandwidth of 10.8 Gb/s and a maximum
aggregate forwarding rate (from port to port) of 5.4 Gb/s.
Each node on the cluster runs Red Hat Linux 6.2 (Linux kernel 2.2.16)
and consists of the following hardware:
- 550 MHz Pentium III processor
- 512 KB L2 cache
- 256MB SDRAM memory using 128MB DIMMS
- Ultra2/Wide SCSI bus and controller, EIDE disk controller
- 9.1GB Ultrawide SCSI hard drive
- Fast Ethernet card
- 16-bit Soundblaster Pro compatible sound card
- 1 parallel, 2 USB, 2 serial, and 1 ultra/wide SCSI ports
- 3 external 5.25" peripheral bays, 4 internal 3.5" hard drive bays
- 1 AGP, 3 PCI, 1 shared, 1 RAID slots
- 40x SCSI CD-ROM
- Harmon Kardan HK195 speakers
- Diamond Viper 2 v.770d 32MB graphics card
| Lab Machines