Background on the UNIX computers and instructions for logging on

To run the SPSS program for statistical analysis, our class will rely on Northwestern's "hardin" and "seldon" computers, which run the "UNIX" operating system in a "distributed computing environment" (DCE).

  • The names (hardin and seldon) come from characters in a futuristic novel by I. Asimov.
  • The computers are linked together under DCE, so it doesn't matter which you enter.
  • DCE allows storing and processing files on multiple computers that are networked together.
Like DOS, Windows, or the Macintosh OS, UNIX is a command system for controlling a computer.
  • It was originally created in 1969 by researchers at Bell Laboratories, so it is not new.
  • Nevertheless, it is currently used as the backbone of many heavy-duty internet servers.
  • Unfortunately, UNIX commands are cryptic and confusing, but it is what we have to work with so you need to learn a tinsy bit of UNIX.
  • One important thing to know is that UNIX is case-sensitive
    • Thus, "mother" and "Mother" are different terms to UNIX.
    • As you may have suspected, my mother (whom I called Mother) was ethnically UNIX, which explains why I am case-sensitive when it comes to e-mail messages.

Use "telnet" to log into either UNIX computer over the campus network

  • Windows and Macintosh "telnet" programs are available on the NU internet CD
  • Enter either of these for the internet address:
  • Once connected, you will see a short policy statement and then the command line, login:
How to log in (remember, UNIX is case-sensitive and usually--but not always--uses lower case in its commands):
  • In this example: the red type represents UNIX talking; boldface is my reply
login: kjanda
^---Enter your account identification, then press enter (return)

password: Change/Me

^---This is your initial password, then press enter (return)
  • You'll be greeted by a message: 
    W E L C O M E   T O  J A N D A ' S  AG&P 220
  • After you have logged-in successfully, type passwd to change your password; press enter after each command.
hardin(kjanda) 41% passwd
Changing password for kjanda
Enter current passwd for kjanda: [type Change/Me here]
New password: [type your new password here--and be sure to remember it!]
Re-enter new password: [retype your new password here]
Password successfully changed in dce.
  • Then logout to end your first session on hardin.
hardin(kjanda) 42% logout
^--"logout" ends the session, most other commands will not work

If you did this successfully, you're on your way to a rewarding career in the lucrative field of computers.

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