1 Readings, Assignments, Labs, and ToDoIndex

• Read (at least) these things (All The Words):
  • Week 12 Notes HTML - this file - Read All The Words
  • Users and Groups - /etc/passwd, /etc/group, su, sudo, chsh, useradd, gpasswd, etc.
  • Unix/Linux Partitions and File Systems - fdisk, mkfs, mount, swap
  • List of Commands You Should Know
• Using your lynda.com account, watch Unix for Mac OS X Users
  • 4. Ownership and Permissions 34m 58s
    • The root user 1m 57s
    • sudo and sudoers 5m 20s

2 Final Exam – Wednesday December 11 15h30 (3:30pm to 6:30pm)Index

• Your Final Exam schedule is posted in the ICT office. The Final Exam is closed-book, no aids, no devices.

• Your Final Exam covers the entire course, with slight emphasis on material since the second midterm test, and on material that students did not answer well in the previous two tests.

• Your Final Exam includes questions from all practice tests, not just the most recent ones.

• For full marks, you must read and understand the Test Instructions before the test for important directions on how to enter your answers and the test version number on the mark-sense forms.

• There may be more questions on the test than you can answer in the time allowed; answer the ones you know, first.

• Practice tests are available for the Final Exam.
  • Read the Practice Test README Information.
  • See the Practice Tests and answer files.
  • The same questions are posted as Quizzes on Blackboard. The Quizzes are random samples from the above practice questions, and so they often repeat questions.
  • If you only want to do each practice question once, use the practice test PDF files, not the Quizzes that repeat questions at random (and may not show you all the possible questions).

3 From the Class Notes link on the Course Home PageIndex

• Course Home Page
• Previous Week
• All Weeks
• Next Week

• Review last week. Did you do everything assigned last week?

4 From the Classroom Whiteboard/ChalkboardIndex

• Your in-class notes go here.

• Data mining: Which users have the most Failed password attempts?
  • HINT: Look in the system authorization log file and use the examples of Pipes to extract and count the userids.
  • Answer given in class Monday November 18 – see your class notes.
• Basic EMail etiquette:
  • Make the Subject: match the message.
  • Don’t quote irrelevant crap in replies; remove the junk.
  • Don’t top-post unless forwarding.
• Use an SMS Gateway List to find the email address of your SMS enabled phone, and email a test message directly to your phone. (May be subject to length restrictions and incur an arbitrary delay.)
  • To find your phone gateway, try http://www.notepage.net/smtp.htm
• Pay attention to how permissions work with sudo and shell redirection! See the notes on redirection in Users and Groups
  • $ sudo touch foo >bar
  • $ sudo cp /etc/shadow foo
  • $ sudo cat /etc/shadow >bar

• The userdel command does not delete HOME directories (unless you use the -r option). What does ls show for a file’s user and group if that user and group have been deleted from the system? See userdel in Users and Groups

  # useradd redshirt
  # id redshirt
  uid=508(redshirt) gid=509(redshirt) groups=509(redshirt)
  # ls -ld /home/redshirt
  drwx------ 2 redshirt redshirt 4096 Nov 20 02:38 /home/redshirt
  # userdel redshirt
  # id redshirt
  id: redshirt: No such user
  # ls -la /home/redshirt
  [... what does ls show now? ...]

• The College tells me you must watch video this during Global Entrepreunership Week: http://lnkd.in/dDeXy3A
  • Click here when you’ve watched it: https://www.vot.rs/56e80b
  • Results: https://www.mentimeter.com/public/5e976e6d2652/did-you-watch-httplnkd-inddexy3a/

• Fill our your Course Evaluation

awk grep sed pwd

5 Real Sysadmin WorkIndex

• How to fix any computer

• Joke (from a Linux student):

Subject: joke, clean Why didn’t the chicken cross the road? Because he did not have an absolute path and could’t find his way. HAHAHAHAHA!

5.2 Take Notes In Class!Index

Take Notes in Class

Author: 
| Ian! D. Allen  -  idallen@idallen.ca  -  Ottawa, Ontario, Canada
| Home Page: http://idallen.com/   Contact Improv: http://contactimprov.ca/
| College professor (Free/Libre GNU+Linux) at: http://teaching.idallen.com/
| Defend digital freedom:  http://eff.org/  and have fun:  http://fools.ca/