SHELL

hello world bash

#!/bin/bash 
echo "Hello world!"

hello world shell script

#!/bin/sh
# This is a comment!
echo Hello World        # This is a comment, too!

Print hello world in shell script

#!/bin/sh
# This is a comment!
echo "Hello World"
# after save the code use chmod 755 file_name.
#insead of 755, you can use +x means to give permission for execution.
#or you can directly use bash file_name