Updated: 2015-03-22 22:54 EDT

1 Readings, Assignments, Labs, Tests, and ToDo

1.1 Assignments and Lab work this week

Check the due date for each assignment and put a reminder in your agenda, calendar, and digital assistant.

1.2 Tests and quizzes

For full marks, read the Test Instructions (all the words) before your final exam.

  1. All Quizzes are open until the Final Exam, then they are closed.
    • Quizzes are random samples and thus do not cover all of the questions in the practice test PDF file. Do the PDF file to be fully prepared.
  2. Final Exam: 180 minutes; Tuesday April 21 11am to 2pm in room C144
    • Take a bathroom break before you sit down for three hours!
    • A draft third set of practice questions is posted. See Practice Tests and Answers.
    • The final exam emphasizes material after the second midterm test, but it covers the whole course and therefore includes material from all the practice question sets.

1.3 Midterm Test #2 Analysis

90/107 people wrote the second midterm test.

100 100 100 97.8 97.8 97.8 97.8 97.8 95.6 95.6 95.6 93.3 93.3 91.1 91.1 88.9 88.9 88.9 88.9 86.7 86.7 86.7 86.2 84.4 84.4 84.4 84.4 84.1 82.2 82.2 82.2 82.2 82.2 82.2 81.9 80 77.8 77.8 77.6 75.6 75.6 75.6 75.6 73.3 73.3 73.3 71.1 68.9 66.7 66.7 66.7 64.4 64.4 64.4 62.2 62.2 62.2 60 60 58.5 57.8 55.6 55.6 55.6 53.3 53.3 48.9 46.7 44.4 40 38.8 35.6 35.6 33.3 28.9 26.7 26.7 24.4 24.4 24.4 20 20 20 17.8 11.1 0 0 0 0 0

#-89: Pass 66 (74.2%)  Fail 23 (25.8%)
#- 36 A (40.4%)    13 A-    8 A   15 A+ 
#- 11 B (12.4%)     1 B-    7 B    3 B+ 
#- 12 C (13.5%)     5 C-    3 C    4 C+ 
#-  7 D ( 7.9%)     0 D-    5 D    2 D+ 
#- 23 F (25.8%)    20 F-    1 F    2 F+ 
#- 90% - 100%  15  ***************      
#- 80% -  90%  21  *********************
#- 70% -  80%  11  ***********          
#- 60% -  70%  12  ************         
#- 50% -  60%   7  *******              
#- 40% -  50%   4  ****                 
#- 30% -  40%   4  ****                 
#- 20% -  30%   9  *********            
#- 10% -  20%   1  *                    
#-  0% -  10%   5  *****

3 From the Classroom Whiteboard/Chalkboard

4 Real Sysadmin Work

4.1 Install a differnet browser – be a better employee

Analysis: People Who Use Firefox Or Chrome Make Better Employees

http://news.slashdot.org/story/15/03/17/0215235/analysis-people-who-use-firefox-or-chrome-make-better-employees

In the world of Big Data, everything means something. Now Joe Pinsker reports that Cornerstone OnDemand, a company that sells software that helps employers recruit and retain workers, has found after analyzing data on about 50,000 people who took its 45-minute online job assessment, that people who took the test on a non-default browser, such as Firefox or Chrome, ended up staying at their jobs about 15 percent longer than those who stuck with Safari or Internet Explorer. They also tended to perform better on the job as well. Chief Analytics Officer Michael Housman offered an explanation for the results in an interview with Freakonomics Radio: “I think that the fact that you took the time to install Firefox on your computer shows us something about you. It shows that you’re someone who is an informed consumer,” says Housman. “You’ve made an active choice to do something that wasn’t default.” But why would a company care about something as seemingly trivial as the browser a candidate chooses to use? “Call centers are estimated to suffer from a turnover rate of about 45 percent annually (PDF), and it can cost thousands of dollars to hire new employees,” says Pinsker. “Because of that, companies are eager to find any proxy for talent and dedication that they can.”

4.2 Why the modern world is bad for your brain

http://www.theguardian.com/science/2015/jan/18/modern-world-bad-for-brain-daniel-j-levitin-organized-mind-information-overload

In an era of email, text messages, Facebook and Twitter, we’re all required to do several things at once. But this constant multitasking is taking its toll. Here neuroscientist Daniel J Levitin explains how our addiction to technology is making us less efficient.

4.3 Locked out of the Course Linux Server I

Someone local tried to log in to the CLS with the root account and got their IP address locked out:

Mar 14 21:47:21 Failed password for root from 70.24.165.106
Mar 14 21:47:33 Failed password for root from 70.24.165.106
Mar 14 21:47:46 Failed password for root from 70.24.165.106
Mar 14 21:47:56 Failed password for root from 70.24.165.106
Mar 14 21:48:01 Failed password for root from 70.24.165.106
Mar 14 21:48:04 Failed password for root from 70.24.165.106
Mar 14 21:48:06 Failed password for root from 70.24.165.106
Mar 14 21:48:16 refused connect from bas2-clarkson16-1176020330.dsl.bell.ca (70.24.165.106)

I told you not to do that. Read All The Words.

4.4 Locked out of the Course Linux Server II

Someone else local tried to log in to the CLS with the root account and got their IP address locked out:

Mar 18 20:47:07 Failed password for root from 70.54.60.28
Mar 18 20:47:16 Failed password for root from 70.54.60.28
Mar 18 20:47:28 Failed password for root from 70.54.60.28
Mar 18 21:33:29 refused connect from orlnon0604w-lp130-01-1177959452.dsl.bell.ca (70.54.60.28)

I told you not to do that. Read All The Words.

4.5 Attacks on the Course Linux Server


Bye Bye Data – rm -rf *

Bye Bye Data – rm -rf *

Read All The Words by Alex and Colin

Read All The Words by Alex and Colin

Take Notes in Class

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/

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