Unix Shell Scripting – Bash & Ksh Automation

Module 1: Introduction to Shell Scripting

• Shell scripting fundamentals: automating repetitive Unix/Linux tasks
• Shell types: bash, ksh, sh, and csh — choosing the right shell
• Script structure: shebang line, comments, and executable permissions
• Running scripts: source, bash, and direct execution methods

Module 2: Variables and Data Types

• Variable declaration and assignment: name=value syntax
• Environment variables: PATH, HOME, USER, and export
• Command substitution: $(command) and backtick syntax
• Arithmetic: expr, $(( )), and let for integer operations

Module 3: Control Flow

• if-then-elif-else-fi: conditional branching in shell scripts
• Test conditions: string, integer, and file test operators
• case statements: pattern-matching conditionals
• Exit codes: $? and meaningful exit status from scripts

Module 4: Loops

• for loop: iterating over lists, ranges, and command output
• while loop: condition-controlled iteration
• until loop: executing until condition becomes true
• break and continue: controlling loop execution flow

Module 5: Functions

• Defining and calling functions in shell scripts
• Passing arguments: $1, $2, $@, and $# in functions
• Local variables: scoping variables within functions
• Return values: exit codes and output capture from functions

Module 6: Input, Output, and Text Processing

• Reading user input: read command and here-documents
• Redirection: >, >>, <, 2>, and /dev/null
• grep: pattern matching with basic and extended regex
• awk and sed: field processing and stream editing in scripts

Module 7: Advanced Shell Scripting

• Arrays: declaring, populating, and iterating arrays in bash
• String manipulation: substring, replace, length, and case conversion
• Trap: catching signals for clean script termination
• Debugging: set -x, set -e, and set -u for robust scripts

Module 8: Capstone Project and Assessment

• System monitoring script: disk, CPU, and memory alert automation
• Log parsing script: extracting and reporting from log files with awk/sed
• Automated backup script: incremental backup with error handling
• Final assessment and course certification

Experience in the Industry Gain expertise from Unix and Linux administrators who have written shell scripts for system automation, log processing, backup management, and deployment tasks across enterprise Unix and Linux environments.

Backgrounds at the Top Our shell scripting trainers have worked at operations and DevOps teams where bash and ksh scripting is an essential daily skill for automating infrastructure tasks, monitoring, and data processing.

Clear & Effective Teaching Shell script structure, variables, control flow, loops, functions, grep, awk, sed, arrays, trap, and debugging are explained with real system administration and automation script examples.

Hands-On Learning Focus Students write shell scripts for system monitoring, log parsing, user management, file automation, and backup procedures through structured hands-on scripting lab exercises.

Up-to-Date Knowledge Trainers keep content current with the latest bash shell features, POSIX shell compatibility best practices, and evolving shell scripting and Linux automation techniques.