Intel Computer Systems Cluster (the "fish machines")

Intel has donated 24 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 at 7am.

New Login Procedure

Due to recent changes in Andrew and SCS computing services' Kerberos security software, it is no longer possible to log into the 15-213 fish machines using your Andrew password.

We have mailed you a userid/password local to the FISH machines.

To connect to a fish machine type the following:

When queried for your password, enter your local password (from the email we sent) not your Andrew password.

Now that you're connected to the fish machine, you must manually authenticate to Andrew in order to access your files by typeing:

Now when queried for your password enter your Andrew password.

You can change your assigned password using the UNIX passwd command, but the change will ONLY affect the machine you're currently logged into. So if you change your password on pike, the new password will only work with pike and you'll have to use the old password on chum,walleye, etc.

If you get a Permission denied, please try again. error, trying connecting using the command:
ssh -l USERID:local

If things don't seem to be working, please email

Getting help

Information about the CS computing environment is at

If you are having difficulty using a FISH machine, please read this FAQ and ask a TA for help before going to the CS facilities.

Frequently asked questions

Q: How do I get an account?
A: Accounts will be created for you automatically.

Q: Are the accounts ready yet?
A: Yes. An almost current status of your account can be found here.

Q: What do I need to do before logging in for the very first time?
A: From your Andrew home directory on one of the Andrew Unix cluster machines ( 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 machines. 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 the contents.

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've run the checkin script?
A: If your Andrew login is bovik and you want to login to machine FISH, then login as follows:

    unix> telnet
    Connected to
    Escape character is '^]'.
    Red Hat Linux release 6.2 (Zoot)
    Kernel 2.2.16 on an i686

             ^^^^^^^^^^^^^^ DON'T LEAVE THIS OUT!
    password: [andrew password]

Alternatively, if you use ssh:

    unix> ssh -l's password: [andrew password]

Don't forget to replace "FISH" with a cluster machine name from the table below.

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 can't login, contact your instructors and we'll get you squared away.

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. The machines can be accessed with either ssh or telnet.

Fish machines available to teaching staff for course development

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:

Last modified: Wed Apr 2 15:51:57 EST 2003