The shell script

Create a simple shell script to print a greeting.

The script will print Hello and the name supplied as the script’s first argument (defaulting to World if none).

• hello.sh

#!/bin/sh

NAME=${1:-world}
echo "Hello, $NAME!"

Set the executable bit and run the script in your terminal.

chmod +x hello.sh
hello.sh

• Output

Hello, world!

Try the script passing a name as an argument.

hello.sh Docker

• Output

Hello, Docker!