Hey so is there a name for the way scripts are written for linux? Like the script @Kasher_CS gave me

Hey so is there a name for the way scripts are written for linux? Like the script @Kasher_CS gave me to change the SDDM cursor size created a file that only had in it:

[Theme}
CursorSize=

Where can I find out the proper wording and stucture linux understands?