Course Outline

	Topic	Reading	Homework	In-class
1	Introduction and review scripting as shell feature technical definition of a shell shells and processes comparison. bash, c shell, korn shell exit status signals files (filesystem, filename structure Demo "Comparative UNIX" on DETER Slides source code patching introduction	read Quigley ch 1 "Introduction to UNIX/Linux Shells" skim ch 2 "Shell Programming QuickStart" showing shell differences through versions of a common script called "the Party Program," adapted for each of the C, bourne, Korn, and bash shells. The script's 4 versions all have the same behavior. Find some of the syntax and code differences. bash from source to address the shellshock bash bug	-	source code patching primitive shells
2	Execute-time code precedence Binary vs script Interpreter scripts ( #! ) Output (echo, printf) Slides getting started	begin reading Quigley ch 3 "Regular Expressions and Pattern Matching" begin reading ch 4 "The grep Family"	-	comparing shells - The Party Program
3 4/16	Interpreter scripts ( #! ) I/O, redirection redirection demo scripts .zip Slides getting started (cont'd.)	I/O redirection refer to, and read/skim these: Bash Redirections Cheat Sheet -with- Bash One-Liners Explained: All about redirections I/O redirection Advanced Bash Scripting Guide chapter 20 "I/O Redirection") finish reading Quigley ch 3 "Regular Expressions and Pattern Matching" finish reading ch 4 "The grep Family" GNU grep manual begin reading ch 13 "The Interactive Bash Shell" long, much of it review	I/O redirection programming	precedence of execution shebang interpreter scripts what they do
4 4/23	Regular expressions subcontractors : grep, sed Interactive bash (model quigley 13) environment command line job control aliases command line expansion arrays Slides regular expressions interactive bash	finish reading ch 13 examine GNU Bash Reference Manual topics upcoming - text tools (based on Robbins & Beebe chs. 3 & 4" read freelance about commands like cut, sort, uniq, fmt, wc, pr, head, tail, strings, dd, file, od/xxd, strings, fold, comm (find the discussions of these that may be found in the textbook, or other resources,e.g. Advanced Bash Scripting Guide section 16.4 "Text Processing Commands") - sed, in the same category but at larger scale - regular expressions - more, and more formally - real scripts, exemplifying particular features (Dave Taylor Wicked Cool Shell Scripts, and Linux Journal "Work the Shell" column; Mendel Cooper Advanced Bash Scripting Guide)	grep exercise	shebang interpreter scripts how they work
5 5,6,7 modeled on quigley ch 14	text tools sed regular expressions real scripts word frequency analysis alphanumeric input validation Slides text processing tools pipelines	ASCII chart - control characters eg ctlZ=dec26=oct032=hex1A generating binary characters in several products documentation per product syntax product comparison matrix script that generates them molly-guard - a "safe remote poweroff" equivalent debian package word-origin anecdote sed resources textbook ch 5 "sed - the Streamlined Editor" GNU sed user's manual (authoritative/comprehensive) sed.sourceforge.net (many, many examples) sed micro primer (appendix in abs Guide)	safe remote poweroff arrays for bubble sort -modify abs word frequency script according to the first item under "Exercises" in the comment block at the bottom of the script. Name your script "wf.sh" and put it in your assignments directory.	word frequency abs version robbins version alphanumeric input validation pipelines to extract data from structured text files (regular expressions, sed, gawk, cut,sort, join)
6 5/7	sed regular expressions Slides text processing with sed real scripts - backgrounder	Hexdump tools: od command usage - to dump files (and other data) in octal (and other) formats for reference - 3 low-level dump/edit commands xxd's documentation od's documentation bvi's documentation 2 more, for Windows: HxD XVI32 sed one-liners one-liners' deeper explanation turn attention to textbook chapter 14, "Programming the Bash Shell." Some of it will be review. Read particularly parts that are new to you.	Obtain the "datebook" file. Do the exercise at the end of textbook chapter 5. Write sed commands to do each prescribed task. Then, make them available to me by placing each in its own sed (not bash) interpreter script file. That is, if you develop the successful command sed 's/A/a/g' datebook put it in the form of a file containing: #/bin/sed -f s/A/a/g Name each of your 10 files according to the question it answers, like q1, q2, etc. If the above responded to question 11 you would name the file "q11" and it should perform correctly when invoked as q11 datebook Make sure all 3 of your file's execute permission bits are turned on.	sed successive effects ways to run sed commands analyzing sed commands sed demos from Mark Sobell
7	Programming bash arguments user input validation arithmetic strings flow control Programming bash (cont'd) functions signals bash options Slides real scripts - backgrounder2	parameter expansion (man bash) textbook ch14 -programming bash anticipate awk - textbook ch 6 - awk one-liners - cheat sheet - awk	textbook ch14 anticipate awk (will post reading)	parameter expansion (exercise) integer input validation
8	More subcontractors : awk Slides text processing with awk	The GNU Awk User's Guide	awk	strings command exercise dd exercise extracting classic AWK book's sample scripts sort multi-line blocks with AWK AWK one-liners word frequency again à la awk (a-k-w book) wordfreq
9 5/28	More subcontractors : awk; bc Slides real scripts - backgrounder3	GNU bc (precision calculator) manual bc tutorial examples - phodd.net Advanced Bash Scripting Guide contains coverage of bc, xargs, and find Read/research about the find command	bc textbook awk lab 5, p 227~~, and lab 6, p 255.~~ Next week we will discuss solution. Put the scripts you write into your assignments directory on the server under names lab5.awk ~~and lab6.awk.~~ get data files	Example program - reporting disk hogs textbook awk lab 3, p 187-88, and lab 4, p 202. Here are my solutions for lab3 and lab4. bc to perform RSA encryption algorithm
10 6/4	find, locate, xargs Slides subcontractors - bc, xargs, find	GNU Findutils manual	find interesting xargs stuff	bc exercise textbook awk lab 5, p 226-27, and lab 76, p 255-56. Here are my solutions for lab5 and lab6.