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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