How To Write A Backup Script In Linux . Open terminal and create an empty shell script using the following command. If future revisions of my script used a different date format, then i would only have to change the date format on. How to Code Your Own Port Scanner Using BASH Script and netcat Tool in from www.geeksforgeeks.org Yes it would be shorter in your script, but only because your script only uses a single target backup file. By using the ls command to list the contents of the specified folder, it can be seen the backupfolder/ is created at the root directory. Let’s create our first shell script.