------------------------
Week 4 Notes for DAT2330
------------------------
-Ian! D. Allen - idallen@idallen.ca

Remember - knowing how to find out an answer is more important than
memorizing the answer.  Learn to fish!  RTFM!  (Read The Fine Manual)

------
Review
------

In Week 3 (week03notes.txt) you read more in Chapter 4 and some notes
posted to the Notes area of the course home page.  (Remember that
Chapter 9 contains a quick tutorial on using the VIM editor.)

You now know some basic meaning and usage of these Unix/Linux commands:

   bash passwd pwd cd mkdir rmdir rm ls
   vim cat more less man echo cp stty
   du wc date chmod who

You can use the "man" command and you can search for keywords in pages.
You can use the shell to redirect the output of any command into a file.
You know how to write simple executable shell scripts.

You received Exercise #3 and submitted it by the due date.

------------------
This Week (Week 4)
------------------

Lecture:

    * A detailed exploration of Redirection.
      - see the new file redirection2.txt under Notes

    * GLOB patterns do not match hidden files unless you explicitly
      include the leading period:  echo .*

    * You can put multiple commands on one line by separating them with
      the semi-colon shell metacharacter:  date ; who ; ls ; pwd

    * Quoting is used to hide metacharacters (including blanks) from
      the shell:  echo "hello >out"

    * Lines end in newline ("\n", NL) characters on Unix. On Microsoft
      systems, they end in carriage-return ("\r", CR) followed by
      newline. On Macintosh systems, they end in carriage-return
      characters. When counting the characters in a file, remember to
      count the newlines: The line "hi", when stored in a Unix file,
      occupies 3 characters.  The output of "echo hi | wc -c" is "3".

New Unix commands used:

    mesg mv head tail touch
    sort (with option -n for numeric and -r for reverse sorting)
    cat (with multiple pathnames)
    "grep pattern file"  e.g. grep alleni /etc/passwd
    "rm -r dir"
    "man -k keyword"

1.  Review previous weekly readings in Running Linux, Chapter 4.

2.  Read these new files under the Notes button on the course home page:

    redirection2.txt        Unix Shell I/O Redirection - Part II
    practiceTest1.*         Practice Test (PDF, PS, and TXT format)
    practiceCommands_1.txt  Practice commands

    There is only one version of the practice test; the .ps and .pdf
    files have identical content; the .txt file has the same questions
    in a different random order.  The answer key is at the end of each
    practice test.

    The practice commands file is a set of questions and exercises of
    varying difficulty.  You should know how to do most of these
    questions based on the Lectures and readings.

3.  Start work on DAT2330 Exercise #4.  Submit it by the due date.

4.  Study for the Midterm Test coming next Monday.  See the practice files.

    Midterm Textbook Topics:

    "Intro", "Logging In", "Setting a Password", "Virtual Consoles" p.81-84
    "Directories", "Listing Files" p.84-86
    "Viewing Files" p.86-87
    "Shells" p.88-89
    "Useful Keys" p.90
    "Typing Shortcuts", "Word Completion" p.91-92
    "Moving Around Among Commands" p.92
    "Filename Expansion" p.92
    "Saving Your Output" p.93

    Midterm Notes files: 

    redirection2.txt           Unix Shell I/O Redirection - Part II
    redirection.txt            Unix Shell I/O Redirection
    pathnames.txt              Unix/Linux Pathnames
    miscellaneous.txt          Miscellanous Unix Facts
    internet_basics.html       Internet Networking Basics, URLs, etc.
    home_and_HOME.txt          Directories: current, HOME, and /home
    arguments_and_options.txt  Options and Arguments on Unix Command Lines
    quotes.txt                 Unix/Linux Shell Command Line Quoting
    shells.txt                 The Unix Shell
    man_page_RTFM.txt          Searching for items in the manual pages (RTFM)

    I will not be asking questions about how to use the VIM editor on
    this test (start of Chapter 9).