% CST8207 Week 06 Notes -- File System, Inodes, Hard links, Midterm Test #1 % Ian! D. Allen -- -- [www.idallen.com] % Winter 2019 - January to April 2019 - Updated 2019-02-15 00:46 EST - [Course Home Page] - [Course Outline] - [All Weeks] - [Plain Text] Readings, Assignments, Labs, Tests, and ToDo ============================================ Read (at least) these things (All The Words) -------------------------------------------- - Your first Midterm test takes place in your lecture class at 8am on Friday. - Read the [Test Instructions] **before** your midterm test this week. - Attend any lab period for help with the questions on the [Practice Tests and Answers] for Midterm 1. - Worksheets 4 and 5 are required before you do [Assignment #05 HTML]. - Content related to Assignment 5 is *NOT* on the first midterm test. 1. [Week 06 Notes HTML] -- this file -- **Read All The Words** 2. [Test Instructions] -- read this **before** your midterm test this week. 3. [Practice Tests and Answers] -- practice questions for your midterm test. 4. [File System, Inodes, Links] -- directories, index nodes (inodes), hard links 5. [List of Commands] -- Command names you should know, listed by week 6. [Video Tutorials on Lynda.com] -- tagged by week number 7. [Linux and Sysadmin News in the World] - Follow last week's instructions to create your lynda.com account, then watch these sections of [Unix for Mac OS X Users] - these videos are for *all* Unix/Linux students, not just Mac OSX users - **3. Working with Files and Directories** - Naming files 5m 41s - use quotes to surround names with blanks or special characters - Hard links 5m 30s - Symbolic links 6m 36s - **5. Commands and Programs** - Disk information commands 6m 8s - df, du, Assignments this week --------------------- > 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. 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. - Review last week. Did you do everything assigned last week? - Read All The Words, Do, and then Submit via Brightspace: - [Assignment #05 HTML] -- using GLOB wildcard patterns, selecting files using GLOB, redirection and pipes. This assignment requires reading [Shell GLOB patterns] and [Shell I/O Redirection] and then doing [Worksheet #04 HTML] and [Worksheet #05 HTML]. - Coming soon: [Assignment #07 HTML] -- start-up files, environment, search PATH, quoting This assignment requires reading the weekly readings first. - OPTIONAL: Read [The VI (VIM) Text Editor] and optionally do the bonus [Assignment #04 HTML] for extra credit. - Really do **Read All The Words**. You don't get a second chance to get it right. Lab work this week ------------------ > 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. - Study the first [Practice Tests and Answers] for your upcoming Midterm Test #1 in your one-hour lecture class at 8am on Friday this week. - Complete and save the ODT or PDF versions of [Worksheet #04 HTML] and [Worksheet #05 HTML] so you can do [Assignment #05 HTML] -- GLOB wildcard patterns, finding files using GLOB, redirection and pipes - These worksheets require you to understand [Finding Files], [Shell GLOB patterns] (wildcard pathname matching) and [Shell I/O Redirection] (including Pipes). - [Assignment #05 HTML] -- GLOB wildcard patterns, selecting files using GLOB, redirection and pipes - This assignment requires you to understand the material in the web pages and both Worksheets 4 and 5. - Coming soon: [Assignment #07 HTML] is about start-up files, environment, search PATH, and quoting - OPTIONAL: Do Bonus [Assignment #06 HTML] after writing Midterm #1. - There is a checking program available to check your file format for this bonus assignment, but only people who Read All These Words will know about it. Wrong file format means no marks. *Do not redirect or save the output of this checking program!* - OPTIONAL BUT HIGHLY RECOMMENDED: Read [The VI (VIM) Text Editor] and optionally do the bonus [Assignment #04 HTML]. Real Linux sysadmin all know how to use this text editor. - **Reminder:** You must actually use the VIM editor during the term to get full marks for this bonus assignment. Read All The Words. ### Worksheets 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 the web notes. (Please: **Read All The Words**) 2. Do the relevant Worksheet(s). 3. Do the relevant Assignment(s). 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 [List of Commands].) 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 get a copy here: [Course Introduction: Install Libre Office]. Worksheets #04 and #05 require you to have read [Shell GLOB patterns] and [Shell I/O Redirection]: - [Worksheet #04 ODT] -- shell GLOB patterns and Aliases - [Worksheet #04 PDF] - [Worksheet #04 HTML] - shell GLOB patterns (wildcards), Aliases: `alias, sum, unalias` - [Worksheet #05 ODT] -- shell I/O redirection (including pipes) - [Worksheet #05 PDF] - [Worksheet #05 HTML] - shell I/O redirection, `date, head, nl, tail, tr, wc` Worksheet #06 is for the optional VIM Bonus Assignment (extra credit): - [Worksheet #06 HTML] -- *Optional* Bonus VIM Text Editor Practice - This is an *optional* worksheet for a BONUS assignment using `vim` - Optional command-line VIM tutorial: the `vimtutor` program on the CLS. - Bonus (optional) [Assignment #04 HTML] -- the VIM text editor - Read [The VI (VIM) Text Editor] Worksheet #08 is for the upcoming Assignment 9. - [Worksheet #08 ODT] -- Linux file system permissions (modes) - This Worksheet is a prerequisite for [Assignment #09 HTML] - [Worksheet #08 PDF] -- PDF version - [Worksheet #08 HTML] -- HTML version - `chmod, ls -lid, umask` Worksheets prepare you for the upcoming assignments. Upcoming tests and exams ------------------------ This course has two midterm tests (10%, 15%) and one final exam (40%). Follow this link to see all your upcoming [Quizzes and Tests]. The dates are also posted on the [Course Home Page] and on [Brightspace CST8207]. For full marks, read the [Test Instructions] (all the words) **before** your midterm tests. 1. First Midterm test: 45 minutes; in your one-hour lecture class in Week 6. 2. Second Midterm test: 45 minutes; in your one-hour lecture class in Week 10. 3. Final Exam -- the date will be posted on ACSIS. Midterm tests take place in your one-hour lecture class, not in your lab period. You must write the midterm test in the lecture class in which you are registered. ### Practice Test #1 and Brightspace Quiz #2 [Practice Tests and Answers] -- practice questions for your midterm test. [Quizzes and Tests] -- Quiz #2 is taken from Practice Test #1 and is good practice for your upcoming Midterm Test #1 in Week 6. Notes from the Classroom ======================== - 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. - **Take notes in class!** Keep a pad open on your desk. - This week, we learn about the Unix/Linux file system, inodes, and links. - You will need to learn a text editor. I highly recommend [The VI (VIM) Text Editor]. Commands Used ------------- > 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. - Are you making notes from the worksheets on how each command works? - What do the options used in the worksheets mean, for each command? - Don't copy and use options that you don't understand! Marking Scheme for Assignment #06 ================================= Bonus (optional) [Assignment #06 HTML] may be done after you get your marks email and question sheet back for Midterm #1. You can use this bonus work to optionally improve your mark on the first midterm test. See the assignment for details. Your question sheet will be brought to the lab section that you wrote on the question sheet, if it is a valid lab section. See the Brightspace course Announcements for details (under "bonus Assignment 6 details"). Searching the course notes ========================== I received an email like the text below from a student who was working on a problem for over two hours: > I have spent almost 2 hours on Task 4.6 and I still can't find the 100 > files. \[...\] I think the problem is searching for warez case-insensitive. > I know we learned this before, but I just can't find it in my notes. This is not good use of student time for two reasons: 1. Don't spend more than 15 minutes on a problem! Your time as a student is valuable. See the [Course Introduction: fifteen minute rule] 2. I show you how to search the course notes for keywords in [Assignment #05 HTML]: - In section [3.2 Searching the course notes on the CLS] - In section [4.5 Searching for text inside files (e.g. course notes)] You have a search tool that will find keywords inside the course notes. Please use it and save yourself time. Who is using the VIM editor? ============================ This page may take a minute or two to load; be patient: [Who is using the VIM editor?] Tutoring ======== 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]. SSH and HTTP Attacks on the CLS =============================== You are not paranoid if they really are out to get you! See the [Week 03 Notes HTML] for command pipelines to count the ongoing attacks on the CLS. Locked out of the CLS ===================== When you are locked out, [follow the directions] in the notes to get your IP address re-enabled. ![Take Notes in Class] -- | 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/ [Plain Text] - plain text version of this page in [Pandoc Markdown] format [www.idallen.com]: http://www.idallen.com/ [Course Home Page]: .. [Course Outline]: course_outline.pdf [All Weeks]: indexcgi.cgi [Plain Text]: week06notes.txt [Test Instructions]: 000_test_instructions.html [Practice Tests and Answers]: 000_practice_tests.html [Assignment #05 HTML]: assignment05.html [Week 06 Notes HTML]: week06notes.html [File System, Inodes, Links]: 450_file_system.html [List of Commands]: 900_unix_command_list.html [Video Tutorials on Lynda.com]: 910_lynda_index.html [Linux and Sysadmin News in the World]: 950_linux_world.html [Unix for Mac OS X Users]: http://www.lynda.com/Mac-OS-X-10-6-tutorials/Unix-for-Mac-OS-X-Users/78546-2.html [Shell GLOB patterns]: 190_glob_patterns.html [Shell I/O Redirection]: 200_redirection.html [Worksheet #04 HTML]: worksheet04.html [Worksheet #05 HTML]: worksheet05.html [Assignment #07 HTML]: assignment07.html [The VI (VIM) Text Editor]: 300_vi_text_editor.html [Assignment #04 HTML]: assignment04.html [Finding Files]: 180_finding_files.html [Assignment #06 HTML]: assignment06.html [Course Introduction: Install Libre Office]: 050_course_introduction.html#install-libreoffice-or-openoffice-into-windows [Worksheet #04 ODT]: worksheet04.odt [Worksheet #04 PDF]: worksheet04.pdf [Worksheet #05 ODT]: worksheet05.odt [Worksheet #05 PDF]: worksheet05.pdf [Worksheet #06 HTML]: worksheet06.html [Worksheet #08 ODT]: worksheet08.odt [Assignment #09 HTML]: assignment09.html [Worksheet #08 PDF]: worksheet08.pdf [Worksheet #08 HTML]: worksheet08.html [Quizzes and Tests]: 000_quizzes_and_tests.html [Brightspace CST8207]: https://brightspace.algonquincollege.com/d2l/home/117776 [Course Introduction: fifteen minute rule]: 050_course_introduction.html#fifteen-minute-rule-dont-waste-your-time [3.2 Searching the course notes on the CLS]: assignment05.html#searching-the-course-notes-on-the-cls [4.5 Searching for text inside files (e.g. course notes)]: assignment05.html#searching-for-text-inside-files-e.g.course-notes [Who is using the VIM editor?]: http://cst8207.idallen.ca/vim19w.cgi [Course Introduction]: 050_course_introduction.html [Week 03 Notes HTML]: week03notes.html [follow the directions]: 070_course_linux_server.html#getting-locked-out-of-the-server [Take Notes in Class]: data/remember.jpg "Take Notes in Class" [Pandoc Markdown]: http://johnmacfarlane.net/pandoc/