Variables in Bash

Variables store data that you can use later in your script.

Rules of Variables

1. NO SPACES around the equals sign!
   • Correct: NAME="Alice"
   • Incorrect: NAME = "Alice"
2. Reference variables using the $ symbol.

#!/bin/bash
USER_NAME="Student"
echo "Welcome, $USER_NAME!"

Environmental Variables

You can export a variable to make it available to child processes (like other scripts or programs you run from this script).

export APP_ENV="production"