Bash Script Tutorial

 Lets begin this bash scripting tutorial with a simple "Hello World" script. Let's start with Learning the bash Shell: Unix Shell Programming




1. Hello World Bash Shell Script


Open vi hello_world.sh


#!/bin/bash
# declare STRING variable
STRING="Hello World"
#print variable on a screen
echo $STRING


escape Colon :wq  w:- save, q:- quit.


Navigate to a directory where your hello_world.sh is located and make the file executable:


$ chmod +x hello_world.sh 


Execute the Script.


$ ./hello_world.sh