Updated: 2017-01-20 00:48 EST
whoami
groups
ls -la
chown
, sudo
, or su
on the CLSrwx
notationchmod
chmod 644 ``[names...]
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.
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. Worksheet. 3. Assignment.
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.
alias, sum, unalias
date, head, nl, tail, tr, wc
vim
vimtutor
program on the CLS.Worksheets prepare you for the upcoming assignments.
Read the Test Instructions (all the words) before your midterm tests. Put these dates into your phone! Use the Name Game link to test your name before the test. I don’t answer questions about the instructions during the test.
Tests take place in class in your 50-minute lecture period, 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.
The Final Exam is in T117/119 Thursday December 15 11h30 in Week 15. The Final Exam is three hours long. Take a washroom break before you start.
176 students are registered in the course.
Of the 176, 11 did not write the test, leaving 165 who did.
Of the 165, 26 did not enter their own name correctly.
Of the 165, 41 did not enter a valid test version number.
Number of students who got question #45
wrong even though the answer was given in the Test Instructions printed at the top of the test: 30
The 165 class scores:
95.6 94.6 93.3 93.3 91.1 90.2 87.1 86.7 85.8 84.4 84.4 82.2 82.2 82.2 82.2 79.2 77.8 77.8 77.8 77 75.6 73.3 73.3 73.3 73.3 72.6 71.9 71.1 71.1 71.1 71.1 70.4 69.7 68.9 68.9 68.9 68.9 68.9 66.7 66.7 66.7 66.7 66.7 66.7 66.7 66 66 66 64.4 64.4 64.4 64.4 64.4 64.4 62.2 62.2 62.2 61.6 61.6 61.6 60.4 60 59.4 58.8 58.2 57.8 57.8 57.8 57.8 55.6 55 55 54.5 53.3 53.3 51.1 51.1 51.1 51.1 51.1 50.1 48.9 48.9 48.9 48.4 46.7 46.7 46.7 46.7 44.4 44.4 44.4 44 42.2 42.2 41.8 41.8 41.4 41.4 41.4 41.4 40 40 40 40 40 39.6 39.2 39.2 37.8 37.4 37 37 36.7 36.7 35.6 35.6 35.6 35.6 35.2 34.8 33.3 33.3 33 33 32.7 32.7 31.1 31.1 30.8 30.8 30.8 30.8 28.9 28.9 28.6 28.6 26.7 26.7 26.7 26.7 26.7 26.4 26.4 26.1 26.1 24.4 24.4 24.2 24 23.7 23.7 23.7 23.5 19.8 19.8 19.6 19.6 17.8 17.8 17.8 17.4 13.3 13.2 0
165: Pass 81 (49.1%) Fail 84 (50.9%)
15 A ( 9.1%) 6 A- 3 A 6 A+
18 B (10.9%) 7 B- 6 B 5 B+
29 C (17.6%) 8 C- 9 C 12 C+
19 D (11.5%) 6 D- 6 D 7 D+
84 F (50.9%) 72 F- 4 F 8 F+
90% - 100% 6 ******
80% - 90% 9 *********
70% - 80% 18 ******************
60% - 70% 29 *****************************
50% - 60% 19 *******************
40% - 50% 26 **************************
30% - 40% 26 **************************
20% - 30% 25 *************************
10% - 20% 6 ******
0% - 10% 1 *
I spent several hours correcting your errors on the mark-sense forms. Before your next test, you need to re-read the Test Instructions. Penalties go up for making Scantron errors on the next test.
Take notes in class! Keep a pad open on your desk.
curl wttr.in/ottawa
Keep a notebook with a List of Commands in it. - You need to write down yourself what each command does. - I will check for this list in your lab periods. - Check the updated list of commands each week. - Bring your notes to class! Stop wasting time looking up commands.
hostname
wc
command (often used in tests):
wc -l
wc -w
(Needed for your second midterm test.)wc -c
Your time as a student is valuable. See the Week 03 Notes HTML.
In addition to the SSH attacks, the Course Linux Server receives 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:
# zfgrep '../..' /var/log/apache2/error.log*
/var/log/apache2/error.log:[Wed Oct 19 20:49:33 2016] [error] [client 189.100.188.31] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0
/var/log/apache2/error.log.1:[Sat Oct 15 06:49:57 2016] [error] [client 177.142.99.103] Invalid URI in request GET /../../../../../../../mnt/mtd/qt HTTP/1.0
/var/log/apache2/error.log.14.gz:[Mon Jun 27 17:54:40 2016] [error] [client 222.198.128.207] Invalid URI in request GET /../../../../../../../mnt/mtd/3qS9 HTTP/1.1
/var/log/apache2/error.log.2.gz:[Fri Oct 07 09:34:11 2016] [error] [client 64.137.234.42] Invalid URI in request GET /../../../../../../../mnt/mtd/ahMk HTTP/1.1
/var/log/apache2/error.log.22.gz:[Mon May 02 12:21:45 2016] [error] [client 222.235.67.147] Invalid URI in request GET /../../../../../../../mnt/mtd/IJSj HTTP/1.1
/var/log/apache2/error.log.23.gz:[Tue Apr 26 17:09:59 2016] [error] [client 67.79.37.250] Invalid URI in request GET /../../../../../../../mnt/mtd/yqcP HTTP/1.1
/var/log/apache2/error.log.42.gz:[Sun Dec 13 13:50:57 2015] [error] [client 54.201.251.33] Invalid URI in request GET /../../ratings.html HTTP/1.1
/var/log/apache2/error.log.42.gz:[Sun Dec 13 13:51:01 2015] [error] [client 54.201.251.33] Invalid URI in request GET /../../index.html HTTP/1.1