Bash.

Bash Setup and First Script

Install and configure Bash on Linux, macOS, and Windows WSL, then write and run your first shell script.

Bash Variables

Master variable assignment, quoting rules, environment variables, export, and special variables like $0, $1, $#, $@, and $$.

Bash Data Types

Learn how Bash handles strings, integers, arrays, associative arrays, and readonly variables with practical examples.

Bash Operators

Learn arithmetic operators with $(( )), floating-point math with bc, string comparison, and the difference between test, [ ], and [[ ]].

Bash Control Flow

Master if/elif/else, case statements, for loops, while and until loops, and break/continue in Bash.

Bash Functions

Learn how to define functions, use local variables, handle return codes, pass arguments, and build reusable script libraries.

Bash File Operations

Use file test operators, safely copy, move, and delete files, and work with find and stat in Bash scripts.

Bash Input and Output

Learn read, echo vs printf, stdin/stdout/stderr, redirection operators, tee, and pipes for building robust Bash pipelines.

Introduction to Bash

Understand what Bash is, how it differs from a terminal and shell, and why it's the backbone of DevOps and automation.

Intermediate

For developers with core concepts down

11 lessons

Bash String Manipulation

Master parameter expansion, substrings, find-and-replace, trimming, case conversion, and heredocs in Bash.

Bash Arrays

Work with indexed and associative arrays in Bash — creation, access, slicing, looping, and reading files with mapfile.

Bash Text Processing

Use grep, sed, awk, cut, sort, uniq, wc, tr, and column to process text and structured data in Bash pipelines.

Bash Process Management

Run background jobs, manage processes with jobs/fg/bg, send signals with kill, use trap for cleanup, and understand subshells.

Bash Error Handling

Write robust scripts with set -euo pipefail, trap ERR, exit codes, meaningful error messages, and safe cleanup patterns.

Regex in Bash

Use the =~ operator, BASH_REMATCH, grep -E, and sed regex for practical pattern matching in Bash scripts.

Bash Networking

Use curl, wget, nc, ssh, scp, rsync, and port checks in Bash scripts for automation and DevOps tasks.

Bash System Information

Use uname, df, du, ps, lsof, netstat/ss, and systemctl to inspect and monitor a Linux system from Bash scripts.

Cron and Scheduling in Bash

Master crontab syntax, cron expressions, at for one-time jobs, systemd timers, and logging cron output properly.

Bash Security Best Practices

Write secure Bash scripts — safe temp files with mktemp, avoiding command injection, handling secrets, and setting file permissions.

Bash Script Patterns

Learn production-ready patterns — argument parsing with getopts, usage functions, loading config files, and script locking.

Advanced

Production-grade patterns for experienced engineers

2 lessons

bash advanced

Bash DevOps Scripts

Production-ready Bash scripts for deployments, backups, log rotation, health checks, and CI/CD pipeline helpers.

bash advanced

Bash Interview Preparation

Top 25 Bash and Shell scripting interview questions with real examples, covering everything from basics to advanced DevOps scenarios.