Shell by Example: Hello World

Shell by Example: Hello World POSIX + Bash

Our first shell script is the classic “Hello World”. This example demonstrates the basic structure of a shell script. You can run this script by saving it to a file named `01-hello-world.sh`, making it executable with `chmod +x 01-hello-world.sh`, and running it via `./01-hello-world.sh` in your terminal. The `echo` command prints text to standard output. It’s one of the most commonly used commands in shell scripting. You can print multiple lines using multiple echo commands.	Edit `#!/bin/sh echo "Hello, World!" echo "Welcome to Shell by Example!"`
	Output: Hello, World! Welcome to Shell by Example!

Bash The `-n` flag prevents echo from adding a newline at the end of the output. This is useful when you want to continue on the same line.	Edit `#!/bin/bash echo -n "Hello" echo ", World!"`
	Output: Hello, World!