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)