Linux Shell Scripting Training

Curriculum:

Linux Command Review:

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

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

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

Integer Arithmetic:

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

Handling Run-Time Data:

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

Condition Execution:

• The if statement
• The test command
• Other test notations
• Default and substitute variables
• Exit status codes
• Exercise: Adding validation to previous scripts

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 guess-the-number game

Multi-Branch Decisions:

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

Functions:

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

Interrupt Handling:

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

Additional Features and Facilities:

• The exec commands
• The includes notation
• More about loops
• Arrays
• Here Documents
• Exercise: Create a here script

Redirection, Pipes and Filters:

• Standard I/O and redirection
• Pipes
• Command separation
• Conditional execution
• Grouping Commands
• LINUX filters
• The tee command

Backup and Restore Utilities:

• Archive devices
• The cpio command
• The tar command
• The dd command

Background Job Scheduling:

• Starting background jobs
• Background tasks and the nohup command
• Process priorities and the nice command
• Job control
• Scheduling jobs with the at the command
• Scheduling jobs with the cron command

Regular Expression Notation:

• Regular expressions
• Extended regular expressions
• Searching Files for Patterns:
• The grep family of commands
• The grep command
• The fgrep command
• The egrep command

The Stream Editor - sed:

• Introduction and command line syntax
• The sed program structure
• sed program processing
• Use sed commands
• sed addresses
• sed instructions
• Hold and get functions>/div>
• Advanced flow control

Commands for Comparing Files:

• Compare two files with the cmp command
• Compare two files with the comm command
• Compare two files with the diff and sdiff commands
• Compare large files with the bdiff command

File Manipulation Commands:

• The file command
• The head command
• The tail command
• The cut command
• The paste command
• The pr command
• The split and csplit commands

Identify and Translate Characters:

• od - octal dump
• Use cat to display non-printing characters
• The expand and unexpand commands
• The tr command

Sorting Files:

• The sort command
• Specify sort keys with –k
• Sort by column positions
• The uniq command

Introduction to the Pattern Scanning Utility - awk:

• Introduction and command line syntax
• The awk program structure
• Use regular expressions
• Operators
• Simple patterns
• Extended patterns
• Comments
• Special patterns (BEGIN and END)
• Program variables
• Built-in variables
• User defined variables
• Mathematical operators
• Enhanced printing
• Handling user variables

awk Program Control Structures:

• Program control structures
• The if construct
• The while and do ... while constructs
• The basic for construct
• Associative array handling
• Functions
• Built in functions
• The system function
• The getline function
• User defined functions