After you have got everything working correctly and working just the way you want it to, this is something you can do if you want to. Not required. You can continue to run the executable script file from the directory you wrote it in with the dot slash option preceding the name (./) or you can install it in one of the directories that hold other executable applications. I would recommend /usr/sbin. The command for that is:
[bash]$ install file_name /usr/sbin |