System Files extension

System files are a series of files created and maintained by the operating system and are necessary for the system to perform its many functions.

System files are used by many commands and subroutines to perform operations. These files can only be changed by a user with root authority. System files are crucial to the operating system. If any of these files are missing or corrupted, the operating system usually can not work or even collapse.

Many system files are set to hidden, so they aren't visible to users, as a preventive measures. Basic system files are incompatible between various operating systems and each operating system has its own native binary formats for them.