If you've ever tried to run a shell script as superuser in Linux by using the syntax sudo ./example-shell-script, you'll know that doesn't work. Instead, this is how you need to do it:

1. Create your script
   vi example-shell-script
2. Change the permissions
   chmod 755 example-shell-script
3. Switch into superuser mode
   sudo su -
4. Run the script
   ./example-shell-script
5. Log out of superuser mode
   exit