how to create and run shell script in linux

It is the easiest and funniest task how to create and run shell script in linux.
It gives lots of handful tools to us.

The shell script file can be transferred from one computer to another very easily.
By using it, we can store our code upto the time we want.

Let's start with an example

create shell file to display all text files on Desktop.
Open any text editor say, leafpad then write the code.
Code is:
• for  i  in  *.txt
• do
• echo  $i
• done
After it, save the file and give it any name with extension .sh Example:  anyname.sh
and save it to any directory.

Now it's the time to run the file

• Open up the terminal,and write command
root@kali:~#   cd  /Desktop
• root@kali:~/Desktop#   chmod  u=x  shell_script.sh
  It gives permission to the shell script to be executable by users.
  
• root@kali:~/Desktop#   ./shell_script
  ./  is used before the name of shell script to run it
  
• Mine output is :  iaminfinity.txt
  iaminnovator.txt
  iammoneymagnate.txt
  iamtheking.txt
  iamtheleader.txt

Hence, to create and run shell script in linux

• create the file with extension .sh
• then give the file permission to get executed by the user
  chmod   u=x  any_file.sh
• then run the file by   ./any_file.sh