C Sc 227 Section 1: Welcome

1)Ice breaker in your Section Room (813 GS)

2)Go to the Computer Science ground floor lab in 228 Gould Simpson

Login to Ubutnu Linux with your UA NetID and the randomly generated password you received in an email from . If you're having trouble logging in, refer to Reasons below.

Do the following one time: Change your password to something you can remember. This requires a secure shell connection to lectura

  • Click Applications > Accessories > Terminal to open a terminal window
  • Enter the unix command ssh lectura and at the prompt, enter the same password you just used (while typing your password, you will not see your password, any asterisks, or even see the cursor move)
  • You are now logged into lectura, enter the command passwd
  • Follow the prompts and enter the same password again, then your new password twice
  • Stay logged into Ubuntu for now. The password file on the majority of Linux systems is continuously updated from the lectura password file (approximately every 15 minutes). Therefore after 15 minutes your new password should be in effect for all logins on lab machines. Try logging out and back in with your new password later in lab (assuming 15 minutes passes)

3) Begin Assignment 1

If time permits, complete Assignment 1:

Note: Hand this printout to your section leader in section or in our next lecture

Reasons: Why you may not be able to login and possible fixes

Your password is case sensitive, enter it again, perhaps three or four times

If you registered for this course less than 24 hours ago, you may not have an account yet. Try again after 6:00 am the next day

If you have forgotten your password, follow items B. and as a last resort C. below

  1. Check your email.arizona.edu account at Your password was sent there--not to your to gmail, Yahoo, or other personal accounts.
  1. If you forgot your password (or permanently deleted your email)
  • go to
  • Click Authenticate and enter your UA NetID and Password (the one for all UofA things)
  • ClickReset my forgotten Unix password (/usr/bin/passwd on lectura)
  • Write down the password presented to you and wait for several minutes to try logging in again with this new password. Caution: It can take up to 20 minutes for the new password to be good.

C. If both options fail, send email to and they will check on your account status