Linux Scripting: Lesson 1

Writing your first Shell script:

To successfully write a shell script, we have to do three things:

1. Write a script

2. Give permission to the shell to execute it

3. Put it somewhere the shell can find it

Writing a script

A shell script is a file that contains ASCII text. To create a shell script, you use a text editor. There are many text editors available for Linux system. Some of the popular ones are vi, vim, emacs, nano, gedit, kmacs

I am going to use VIM to write my first script. Now lets start it.

NOTE: write the commands only between the <>which  i will mention below

1. Login to your linux machine and type <vim>

Now you are into a text editor.

2. Press <i> to start typing in the text editor.

3. Type following 

< #!/bin/bash

   # My first script

       echo "Hello my name is Billy Jean!">

4. Type <:w billyjean> (This will save your script as billyjean)

5. Type <:wq!>  (This will let you exit from the text editor)

6. Type <chmod 777 billyjean> (This will give full permission to run the script)

7. Type <./billyjean> (This should display what you have written in between "" after echo)