Introduction to Unix/Linux OS architecture (Kernel, Shell, File System)

Essential Linux commands: file management (ls, cp, mv, rm), permissions (chmod, chown), and navigation

Understanding environment variables, system paths, and standard streams (stdin, stdout, stderr)

Input/Output redirection (>, >>, <), piping (|), and command chaining

Text editors in Unix: Vim, Nano, and Emacs basics

Creating, executing, and debugging shell scripts (#!/bin/bash)

Shell variables: local vs. global variables, positional parameters ($1, $2, $@, $#)

User input processing (read) and arithmetic operations (expr, bc, $(( )))

Conditional statements: if-else, elif, case statements, and file test operators

Looping constructs: for, while, until loops, and loop control (break, continue)

Mastering Regular Expressions (Regex) for text search and validation

Efficient file searching using find, grep, egrep, and fgrep

Stream editing with sed: line insertion, deletion, pattern substitution, and text filtering

Powerful data processing with awk: record/field processing, formatted printing, and reporting

String manipulation, sorting (sort), and deduplication (uniq)

Managing system processes: ps, top, htop, kill, nice, background/foreground jobs (&, fg, bg)

Job scheduling using crontab and at commands for automated task execution

Networking commands for automation: ssh, scp, rsync, curl, wget, netstat

Functions in Bash: defining parameters, return values, and reusable script libraries

Signal handling, trap handling, and error handling in scripts (set -e, set -x)