What are the three types of permissions in a Linux system?

In a Linux system, the three types of permissions are associated with different categories of users who can access files and directories: User, Group, and Others.

The User category represents the owner of the file, who has specific permissions that can be granted independently of others. The Group category refers to a set of users that share access permissions to a file or directory. Permissions can be configured such that all members of the group have the same level of access. Lastly, the Others category encompasses all other users who are not the owner and are not part of the group associated with the file or directory. This structure allows for precise control over who can read, write, or execute files, enhancing security and collaboration in a multi-user environment.

The other options do not accurately represent the recognized categories of file permissions in Linux. The terms such as Owner, Group, and Public lack the specific distinction of "User," "Group," and "Others," which is crucial in Linux permission management. Similarly, Admin, Member, Guest and Root, User, System do not reflect the standard terms used in the context of Linux file permissions.