Linux Bash Shell Programming (STA_LBSP)

Linux Bash Shell Programming Training Course

Course Contents - DAY 1

Course Introduction

• • Administration and Course Materials
• • Course Structure and Agenda
• • Delegate and Trainer Introductions

Session 1: UNIX COMMAND REVIEW

• • Basic Unix commands
• • General commands
• • File and directory handling commands
• • Filename generation characters
• • I/O Redirection features
• • Other commands

Session 2: GETTING STARTED

• • What is a shell script?
• • Development guidelines
• • Creating and editing shell scripts
• • Naming and storing shell scripts
• • Executing shell scripts
• • Exercise: Write a simple shell script

Session 3: USING VARIABLES

• • Environment variables
• • Local variables
• • Assigning values to variables
• • Assessing variable values
• • Using quotes
• • Delimiting variable names
• • Echo control sequences
• • Exercise: Add variables to a script

Session 4: INTEGER ARITHMETIC

• • Using the expr command
• • Using the (( )) notation
• • Exercises: Add integer arithmetic to a shell script

Session 5: HANDLING RUN TIME DATA

• • The read command
• • Command line arguments
• • Exercise: Writing a generic shell script
• • Exercise: Writing an interactive shell script

Session 6: CONDITIONAL EXECUTION

• • The if statement
• • The test command
• • Exercise: Adding validation to previous scripts

Session 7: ADDITIONAL KORN,BASH & POSIX SYNTAX

• • Other test notations
• • Default and substitute variables
• • Exit status codes
• • Exercise

Linux Bash Shell Programming Training Course

Course Contents - DAY 2

Session 8: LOOP CONSTRUCTS

• • The while loop
• • The until loop
• • The for loop
• • The while true and until false loops
• • Loop control commands
• • Exercise: Enhancing the previously written scripts
• • Exercise: Writing a script to copy files using a 'for' loop
• • Exercise: Writing a script to generate numbers with the 'while' loop

Session 9: MULTI-BRANCH DECISIONS

• • The case statement
• • Menu driven applications
• • Exercise: Developing and writing a menu system

Session 10: SCRIPTING WITH AWK

• • Fundamentals of AWK
• • Basic AWK scripts
• • AWK within Bash constructs
• • Exercise: AWK scripts

Session 11: FUNCTIONS

• • What is a function?
• • Syntax
• • Examples
• • Creating a Function Library
• • Exercise: Add a function to a script

Session 12: INTERRUPT HANDLING

• • Interrupt signals
• • Trapping interrupts
• • Exercise: Adding traps to the menu script

Appendix A: ADDITIONAL FEATURES AND FACILITIES

• • The exec commands
• • The includes notation
• • More about loops
• • Arrays

Appendix B: VIM QUICK REFERENCE

Appendix C: UNIX COMMANDS QUICK REFERENCE

Appendix D: ADDITIONAL EXERCISES

Linux Bash Shell Programming Training Course

Course Contents - DAY 3

Session 13: BACKUP AND RESTORE UTILITIES

• • Backing-up and restoring files
• • Basic and advanced use of tar
• • Compression utilities gzip,bzip2,zip and compress
• • Exercise: Backing up and restoring files using tar
• • Exercises: Compressing files

Session 14: BACKGROUND JOB SCHEDULING

• • Scheduling jobs with the cron command
• • Scheduling jobs with the at command
• • Exercises: Running background jobs

Session 15: COMMANDS FOR COMPARING FILES

• • Compare files with the cmp command
• • Compare and format files with pr
• • Compare files with the comm command
• • Compare files with the diff and sdiff commands
• • Compare large files with the bdiff command
• • Exercises: Identifying file differences

Session 16: SPLITTING FILES

• • The fold command
• • Split files using context and content rules
• • Exercises: Splitting files

Linux Bash Shell Programming Training Course

Course Contents - DAY 4

Session 17: IDENTIFYING AND TRANSLATING CHARACTERS

• • od - octal dump
• • Use cat to display non-printing characters
• • View and format files with nl
• • The expand and unexpand commands to convert between tab and space characters
• • The tr command for character translation
• • Exercises: Translating characters with tr

Session 18: REGULAR EXPRESSION NOTATION REVIEW

• • Standard regular expressions
• • Searching with grep
• • Metacharacters,positional characters and quantifiers
• • Extended regular expressions
• • POSIX character classes
• • PERL expressions

Session 19: THE STREAM EDITOR sed

• • sed command line syntax
• • sed script files
• • sed command processing
• • sed addresses and simple instructions
• • sed pattern space and hold space
• • Grouping sed commands
• • Hold and get functions
• • Advanced flow control
• • Write output to temporary files
• • Exercises: Text processing with sed

Session 20: FUNDAMENTALS OF AWK

• • Basic AWK usage
• • AWK program-files
• • AWK scripts
• • AWK variables
• • Pattern matching with AWK
• • AWK extended patterns

Session 21: AWK OPERATORS

• • AWK operators
• • AWK arithmetic operations
• • AWK output
• • Formatting output with printf
• • Exercises: Create awk scripts to extract selected data from a file and generate reports

Linux Bash Shell Programming Training Course

Course Contents - DAY 5

Session 22: AWK PROGRAM CONTROL STRUCTURES

• • The BEGIN and END functions
• • The AWK if construct
• • The AWK else if construct
• • The AWK while construct
• • Other program control statements
• • The AWK break,continue and exit statements
• • User defined functions
• • Exercises: Create AWK scripts and program-files utilising program control structures

Session 23: AWK FUNCTIONS

• • AWK string functions
• • AWK length,tolower,toupper,index,sub,gsub,match,substr,split,sprintf,system and getline functions
• • Exercises: Generate AWK scripts and program-files to extract and format data using AWK functions

Session 24: AWK ARRAYS

• • AWK associative arrays
• • Multi-dimensional arrays
• • Exercises: Create AWK associative arrays to process text files and generate reports

Session 25: MISCELLANEOUS TOOLS

• • bc (calculator)
• • fuser (testing for files in use)
• • getops (checking options passed to shell scripts)
• • printf (formatting screen output)
• • logger (script logging)
• • xargs (generating arguments for a command)
• • eval (re-evaluating variables)
• • Exercises: Using tools within a shell script