In-class Examples List

CS 279 - Introduction to Linux
Fall 2012

Last modified: Tuesday, December 11, 2012

Important Notes:

• This is merely a selection of files and examples, most of which were mentioned or used in the class (lectures and labs). It is not a comprehensive list, nor are all lectures and labs included. Formatting is generally minimal.

• Week 15, Lecture 2, December 6, 2012 - Final Exam review - screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • clicker1.sh - a little shell script based on the first clicker question, playing with bash functions a bit
  • clicker3.sh - a little shell script based on the third clicker question, playing with a case statement a bit
  
  
• Week 15, Lecture 1, December 4, 2012 - some more commands: date, cal, printf, df, du, uname, sudo, useradd, passwd - and a little system administration advice - Week 15 Lecture 1 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class from my Mac (I think)
  • edited history file of commands demonstrated during class from my st10 account on nrs-projects
  • edited history file of commands demonstrated during class from my new 279dummy account on nrs-projects
  
  
• Week 14, Lecture 2, November 30, 2012 - uptime, a few attempted words about load average, top, at, batch, and IFS used with read - Week 14 Lecture 2 projected notes
  • screen shot of examples projected in-class from nrs-projects
  • edited history file of commands demonstrated during class from nrs-projects (I think)
  • screen shot of examples projected in-class from my Mac
  • edited history file of commands demonstrated during class from my Mac (I think)
  • ifs-play.sh - a little shell script for playing with IFS used with read
  
  
• Week 14, Lab, November 29, 2012 - intro to crontab, lab exercise on crontab, RCS, and the bash case statement - Week 14 Lab projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • lab14-2-crontab.txt - an example of a crontab file of crontab entries that works; actually from a pre-lab-14 test of crontab from my tuttletest account on nrs-project; result of the redirected output of the crontab -l command
  
  
• Week 14, Lecture 1, November 28, 2012 - intro to bash case statement, intro to RCS (revision control system) - Week 14 Lecture 1 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • case-play.sh
  • case-clicker.sh
  
  
• Week 13, Lecture 2, November 15, 2012 - talking more about expr and bc; intros to sleep, time, wait, nohup, nice, renice - Week 13 Lecture 2 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • screen shot of commands projected from "other" terminal in-class (mostly process status calls!)
  • edited history file of commands from "other" terminal in class
  • beeper.sh
  
  
• Week 13, Lab, November 14, 2012 - practicing with command-line sftp under openSUSE - screen shot of clicker-question-related examples projected in lab
  • edited history file of commands from those clicker-question-related examples (I think)
  
  
• Week 13, Lecture 1, November 13, 2012 - talking a bit more about bash functions, intro to sftp; looks like there is some expr and bc play here, too - Week 13 Lecture 1 projected notes
  • screen shot of examples projected in-class
  • screen shot of examples projected in-class from another terminal (I think)
  • funct-exit.sh and call-funct-that-exits.sh
  • funct-return.sh and call-funct-that-returns.sh
  • echo3.sh
  • factorial.sh
  
  
• Week 12, Lecture 2, November 8, 2012 - intro to bash shell script functions - Week 12 Lecture 2 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • moo-funct-play.sh
  • just-moo-functs.sh
  • use-moo-functs.sh
  • just-moo5.sh
  • use-moo5.sh
  • scope1.sh
  
  
• Week 12, Lab, November 7, 2012 - intro to openSUSE and KDE - Week 12 Lab projected notes
  
  
• Week 11, Lecture 1, October 30, 2012 - more history-related command-line shortcuts, and intro to sed, continued - Week 11 Lecture 1 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • try-bang.sh - little shell script that seems to show that !! doesn't seem to be able to be used in a bash shell script
  • foodiebar.txt - little text file used in playing with sed in a number of this day's examples
  
  
• Week 10, Lecture 2, October 25, 2012 - a few more ls options, intro to head and tail, beginning of intro to sed - Week 10 Lecture 2 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • loopy-print.sh - a silly shell script that loops 30,000 times between printing each command-line argument to a file loopy.txt, so can use with and see how tail -f lets you see additions to a file as they are happening
  
  
• Week 10, Lab, October 24, 2012 - setting your bash command prompt - Week 10 Lab projected notes
  • http://www.gnu.org/software/bash/manual/bashref.html#Printing-a-Prompt - direct link to GNU bash reference manual's list of special characters that can be used in customizing your bash prompt, within environment variable PS1
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  
  
• Week 10, Lecture 1, October 23, 2012 - intro to the BASH_REMATCH array (holds matches to regular expression subexpressions), intro to gzip/gunzip and tar - Week 10 Lecture 1 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • rematch-play.sh - using/demonstrating the BASH_REMATCH array
  • clicker-rematch.sh - playing with a clicker question regarding the BASH_REMATCH array
  
  
• Week 9, Lecture 2, October 18, 2012 - a little more on bash arrays, and intro to find part 2 - Week 9 Lecture 2 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • quoted-star-at.sh - comparing ${arr[*]} vs. ${arr[@]} vs. "${arr[*]}" vs. "${arr[@]}"
  
  
• Week 9, Lab, October 17, 2012 - intro to find part 1, and intro to bash arrays - Week 9 Lab projected notes
  • screen shot of examples projected in-class
  • array-play.sh - playing with a bash array
  
  
• Week 9, Lecture 1, October 16, 2012 - more on diff, wc, touch, tee, and starting intro to the find command - Week 9 Lecture 1 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  
  
• Week 8, Lecture 2, October 11, 2012 - interactive input, how to get the exit status of the last command executed, a few words on device files (including /dev/null), a few words on the commands which, cmp, and diff - Week 8 Lecture 2 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • simple-read.sh - a first, simple example of interactive input from a bash shell script
  • loop-read.sh - handling a list of items interactively entered as one list in a loop
  • either.sh - demo of a little script that accepts either command-line OR interactive input
  • y-or-n.sh - demo of a little script that keeps asking for input until the user enters something starting with y, Y, n, or N
  
  
• Week 8, Lab, October 10, 2012 - little bit more on conditional tests, and some useful odds-and-ends such as exiting a shell script early and looping through all the lines of a file - Week 8 Lab projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • exit-ex.sh - demo of exiting early from a shell script (because of an inappropriate argument)
  • for-quotes.sh - demo of why "$@" is safer than $@ if arguments with blanks are a possibility
  • more-than-5.sh - demo with numeric comparison (verifying that the number of command-line arguments is as required)
  • glob-play.sh - playing with using a filename-expansion-pattern (also called globbing) in a test -- using = within [[ ]]
  • read-lines-ex.sh - reading and doing something with each line in a file -- using while, read, and input file redirection at the loop's footer/done!
  
  
• Week 8, Lecture 1, October 9, 2012 - using regular expressions - more grep options, bash if-statement, and a smattering of tests for if-conditions - Week 8 Lecture 1 projected notes
  • screen shot of examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • grep1.sh - demo of grep with the -l option to create a list of desired files to loop through
  • iffy1.sh - demo of a first example of a bash if statement
  • if-and-re1.sh - demo playing with regular expressions (BRE and ERE) in an if statement's conditions
  • clicker-if.sh - playing with the options given as possibilities as an if's conditions in the 4th clicker question
  • three little text files used in the in-class examples: pig.txt , piggy.txt , blah.txt
  
  
• Week 7, Lab, October 3, 2012 - more on regular expressions - Basic Regular Expressions (BREs) and Extended Regular Expressions (EREs) - and command line arguments in bash shell scripts - Week 7 Lab projected notes
  • screen shot of grep examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • cmd-line-args.sh - example of command-line arguments in a bash shell script
  • play-args.sh - example with command-line arguments used in clicker question
  
  
• Week 7, Lecture 1, October 2, 2012 - continuing with Basic Regular Expressions in UNIX (BREs) - Week 7 Lecture 1 projected notes
  • screen shot of grep examples projected in-class
  • edited history file of commands demonstrated during class (I think)
  • animals.txt - used in a number of the grep examples
  • clicker1-2.txt - file grep'ed in clicker questions 1 and 2
  • clicker3.txt - file grep'ed in clicker question 3
  
  
• Week 6, Lecture 2, September 27, 2012 - Week 6 Lecture 2 projected notes
  • varplay.sh - tiny shell used to play with local variables
  • trydog.sh - tiny shell used to demo the difference between environment and local variables (but only works if you set up variables dog and cat in the calling shell in advance)
  • clicker1.sh - tiny shell used to demo clicker 1 question
  • clicker2.sh - tiny shell used to demo clicker2 question
  
  
• Week 6, Lab, September 25, 2012 - Week 6 Lab projected notes
  • backup-all.sh - tiny shell used to demo backquoting a command and a "list-style" for-in loop
  • backup-txt.sh - another tiny shell used to demo backquoting a command and a "list-style" for-in loop
  • oinky.sh - tiny shell used to demo backquoting a command and a "list-style" for-in loop along with the command grep -l
  • other-for.sh - tiny shell used to demo a "count-controlled"/ "traditional" for-loop
  
  
• Week 5, Lecture 2, September 20, 2012 - Review for Exam 1, to be given NEXT TUESDAY, September 25th; Exam 1 Review Suggestions (in tagged PDF)
  • edited history file of commands demonstrated during class (I think)
  
  
• Week 5, Lab, September 19, 2012 - more from Chapter 2, including Week 5 Lab projected notes
  • little.sh - tiny shell used for standard output and standard error redirection examples
  • edited history file of commands demonstrated during class (I think)
  
  
• Week 5, Lecture 1, September 18, 2012 - more from Chapter 2, including Week 5 Lecture 1 projected notes
  • tryBash.sh - tiny shell used for shell-permissions-needed- for-execution experiments
  • compiled-play.cpp - tiny C++ program used to show that only x permission is needed to execute a compiled program (unlike a shell script, which requires r to run with a shell command (such as bash), and requires r and x to execute by just giving its name)
  • edited history file of commands demonstrated during class (I think)
  
  
• Week 4, Lecture 2, September 13, 2012 - more from Chapter 2, including Week 4 Lecture 2 projected notes
  
  
• Week 4, Lecture 1, September 11, 2012 - more from Chapter 2, including Week 4 Lecture 1 projected notes
  • jobs-demo.sh - tiny shell used for source demo
  • long-loopy.sh - small shell used to demo what a job running in the background looks like -- consider it a preview of shell programming to come...
  • path-to-play.sh - tiny shell used for environment variable demo
  • harmless-to-call.sh - tiny shell used with path-play.sh for environment variable demo
  • term-try.sh - tiny shell used for environment variable clicker question
  • edited history file of commands demonstrated during lecture (I think)
  
  
• Week 3, Lecture 2, September 6, 2012 - more from Chapter 2, including Week 3 Lecture 2 projected notes
  • edited history file of commands demonstrated during lecture (I think)
  
  
• Week 3, Lab, September 5, 2012 - more from Chapter 2, including control character assignments, filename expansion wildcard characters, and signals; Week 3 Lab projected notes
  • edited history file of commands demonstrated during lab (I think)
  
  
• Week 2, Lecture 2, August 30, 2012 - more from Chapter 2, including symbolic mode for specifying file permissions; Week 2 Lecture 2 projected notes
  • file1 - a tiny shell script used for some in-class examples
  • edited history file of commands demonstrated during lecture
  
  
• Week 2, Lab, August 29, 2012 - intro to writing bash shell scripts, a little more from Chapter 2; lab2script.sh, our first bash shell script
  • looky - holds redirected output of a couple of runs of lab2script.sh
  • a few little notes about nicknames for background jobs
  
  
• Week 2, Lecture 1, August 28, 2012 - starting Chapter 2 of the course text: UNIX basics/fundamentals; Week 2 Lecture 1 projected notes
  • edited history file of commands demonstrated during lecture
  
  
• Week 1, Lecture 2, August 24, 2012 - more UNIX/Linux history and background; Week1 Lecture 2 projected notes
  
  
• Week 1, Lab, August 22, 2012 - Going over a basic "starter" set of UNIX commands/forms; edited history file of commands demonstrated during lab

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Please send questions to: sharon.tuttle@humboldt.edu