Bash Environment Variables and .bashrc vs .bash_profile
Bash environment variables explained with real output: PATH, HOME, USER, SHELL, LANG, TERM, local vs exported variables, and which startup file Bash reads.
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Your First Bash Script: Shebang, Shell Types and Limits
Write and run your first Bash script, pick the right shebang (#!/bin/bash vs env), understand login and interactive shells, and know when to switch languages.
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What Is Shell Scripting in Linux? Shells Explained
What shell scripting is and how it runs on Linux, shell vs terminal, Bash vs sh vs zsh vs ksh vs fish, and why sysadmins and DevOps use it. Real output.
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