Updated: 2017-10-10 14:00 EDT

1 How To Succeed in LinuxIndexup to index

 _   _                 _____       ____                              _   _         _     _                  
| | | | _____      __ |_   _|__   / ___| _   _  ___ ___ ___  ___  __| | (_)_ __   | |   (_)_ __  _   ___  __
| |_| |/ _ \ \ /\ / /   | |/ _ \  \___ \| | | |/ __/ __/ _ \/ _ \/ _` | | | '_ \  | |   | | '_ \| | | \ \/ /
|  _  | (_) \ V  V /    | | (_) |  ___) | |_| | (_| (_|  __/  __/ (_| | | | | | | | |___| | | | | |_| |>  < 
|_| |_|\___/ \_/\_/     |_|\___/  |____/ \__,_|\___\___\___|\___|\__,_| |_|_| |_| |_____|_|_| |_|\__,_/_/\_\
                                                    

Some advice from CST student Joshua McNeely

“learn how to use the website early, because it is an incredibly useful resource (it’s the only resource needed).”

2 Readings, Assignments, Labs, Tests, and ToDoIndexup to index

2.1 Read (at least) these things (All The Words)Indexup to index

  1. Week 04 Notes HTML – this file – Read All The Words
  2. Shell GLOB patterns (wildcard pathname matching)
  3. Shell I/O Redirection – stdin, stdout, stderr, and Pipes
  4. Practice Tests and Answers – practice questions for your midterm test.
  5. List of Commands You Should Know
  6. Video Tutorials on Lynda.com – tagged by week number
  7. Linux and Sysadmin News in the World

2.2 Assignments this weekIndexup to index

Check the due date for each assignment and put a reminder in your agenda, calendar, and digital assistant. Just like in the Real World, not all due dates are on the same days or at the same times.

2.3 Lab work this weekIndexup to index

2.3.1 WorksheetsIndexup to index

Worksheets are preparation for your assignments. You can’t do the assignments without having done the worksheets first, and you can’t do the worksheets without having first read the Course Notes: 1. Read. 2. Worksheets. 3. Assignment.

Make notes from the worksheets on how each command works. What do the options used in the worksheets mean, for each command? (See the weekly Command List.)

Form a small study group to do the worksheets. Each person tries the example given, and you make sure you all get the same answers. Worksheets are not for hand-in; they are not worth marks; the assignments test your knowledge of the lectures and worksheets.

The worksheets are available in four formats: Open Office (ODT), PDF, HTML, and Text. Only the Open Office format allows you “fill in the blanks” in the worksheet. The PDF format looks good but doesn’t allow you to type into the blanks in the worksheet. The HTML format is crude but useful for quick for viewing online.

Do NOT open the Worksheet ODT files using any Microsoft products; they will mangle the format and mis-number the questions. Use the free Libre Office or Open Office programs to open these ODT documents. On campus, you can download Libre Office here.

These first two worksheets require you to have read File System and Pathnames:

Worksheets prepare you for the upcoming assignments.

2.4 Upcoming testsIndexup to index

Note that your upcoming Midterm Test #1 is worth more than three assignments put together. Don’t spend all your time doing an assignment at the expense of studying the Practice Tests and Answers for the Midterm Test.

For full marks, read the Test Instructions (all the words) before your midterm tests. Midterm tests and the final exam are closed-book, no aids (just like your job interview). You will be given scrap paper to write on, and you may write on the question sheet.

Put the test dates into your phone! Use the Algonquin Registered Name Game link to test your name before the test. I don’t answer questions about the instructions during the test.

  1. First Midterm test: 45 minutes; in your one-hour lecture class on Thursday or Friday in Week 5 (October 5 or 6).
  2. Second Midterm test: 45 minutes; in your one-hour lecture class on Thursday or Friday in Week 9 (November 2 or 3).

Tests take place in your 50-minute lecture class, not in your lab period. Each midterm test is 45 minutes long and contains approximately 45 multiple-choice questions similar to those found in Practice Tests and Answers. You must write the test in the lecture class in which you are registered.

2.4.1 Midterm Test #1 – October 5 or 6Indexup to index

  • Midterm #1 takes place on Thursday or Friday, October 5 or 6 (Week 5), in your scheduled lecture class (not in your lab period).
  • The tests and exams are all closed-book, no aids, just like your job interview. You will be given some scrap paper to write on.
  • For full marks, you must read the Test Instructions before the test for important directions on how to enter your name, student number, answers, your lab (not lecture) section number, and the test version code on the question sheet and 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.
  • A set of practice questions and answers for the first midterm test is posted in Practice Tests and Answers.
    • The tests use the semicolon ; to separate multiple commands on the same line, to save space and paper, e.g. three separate commands can be written on one line like this: date ; echo "hi" ; ls
    • Do not use semicolons as an interactive human user! Type each command on its own line with the [Enter] key.

2.4.2 Midterm #1 TopicsIndexup to index

  • The Weekly Notes 1, 2, 3, and 4 (this week), including the readings.
  • Weekly web pages up to and including Shell I/O Redirection.
  • Worksheets 2, 3, 4, and 5.
  • Assignments 2 and 3.
  • The questions in the first practice test in Practice Tests and Answers.
  • Does not include anything about editors vim or nano.
  • Does not include anything about the Course Introduction.

For full marks, you must read and understand the Test Instructions.

2.4.3 Blackboard Quiz #1Indexup to index

  • Blackboard has some quizzes taken randomly from the first practice test in Practice Tests and Answers.

  • The practice test itself is not part of your course grade, but these quizzes are part of your course grade.

  • See the Blackboard Quizzes section located in Practice Tests and Answers.

3 Notes from the ClassroomIndexup to index

3.1 Draw file system diagramsIndexup to index

See last week’s note about drawing file system diagrams: Week 03 Notes HTML

3.2 Commands UsedIndexup to index

Keep a notebook with a List of Commands in it.

  • You need to write down yourself what each command does.
  • Check the updated list of commands each week.
  • I will check for this list in your lab periods.
  • Bring your notes to class! Stop wasting time looking up commands.

4 TutoringIndexup to index

Many students find that hiring a personal tutor helps them get through the first term. Financial assistance is available. See the Tutoring heading in the Course Introduction.

5 SSH Attacks on the CLSIndexup to index

You are not paranoid if they really are out to get you! See the Week 03 Notes HTML for command pipelines to count the attacks on the CLS.

5.1 HTTP attacks on Course Linux ServerIndexup to index

In addition to the SSH attacks, machines on the Internet receive attacks using bogus HTTP requests. These unsuccessful attacks below attempt to use a chain of parent directories to fetch a file out of the file system:

[Dec 13 13:50:57 2015] [client 54.201.251.33] Invalid URI in request GET /../../ratings.html HTTP/1.1
[Dec 13 13:51:01 2015] [client 54.201.251.33] Invalid URI in request GET /../../index.html HTTP/1.1
[Apr 26 17:09:59 2016] [client 67.79.37.250] Invalid URI in request GET /../../../../../../../mnt/mtd/yqcP HTTP/1.1
[May 02 12:21:45 2016] [client 222.235.67.147] Invalid URI in request GET /../../../../../../../mnt/mtd/IJSj HTTP/1.1
[Jun 27 17:54:40 2016] [client 222.198.128.207] Invalid URI in request GET /../../../../../../../mnt/mtd/3qS9 HTTP/1.1
[Oct 07 09:34:11 2016] [client 64.137.234.42] Invalid URI in request GET /../../../../../../../mnt/mtd/ahMk HTTP/1.1
[Oct 15 06:49:57 2016] [client 177.142.99.103] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0
[Oct 19 20:49:33 2016] [client 189.100.188.31] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0
[Oct 23 00:43:39 2016] [client 191.189.55.9] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0
[Nov 02 21:35:09 2016] [client 201.37.223.72] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0
[Jan 07 20:51:33 2017] [client 201.17.154.181] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0
[May 10 21:22:29 2017] [client 187.67.167.31] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0

The Apache server blocked all the above attacks.

Take Notes in Class

Take Notes in Class

Author: 
| Ian! D. Allen, BA, MMath  -  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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