Which statement describes the Linux permission categories?

Which statement describes the Linux permission categories?

• A. Owner, Group, Public
• B. User, Group, Others
• C. Admin, User, Root
• D. Primary, Secondary, Tertiary

Answer: (B)

The key idea is that Linux file permissions are defined for three distinct groups: the user who owns the file, the group associated with the file, and everyone else. This is why the best description is “User, Group, Others.” The owner (user) is the file’s owner, the group is the assigned group, and others means all remaining users not in the owner or group categories. When you look at permissions with a command like ls -l, you see three sets of permission bits corresponding to these three categories, and chmod uses shortcuts like u, g, and o to adjust them. While people sometimes say “public” or “world” to mean everyone else, the formal category name in Linux is others. The other options use terms that aren’t part of the Linux permission model. For example, a typical permission string shows what each category can do (read, write, execute) for owner, group, and others.

The key idea is that Linux file permissions are defined for three distinct groups: the user who owns the file, the group associated with the file, and everyone else. This is why the best description is “User, Group, Others.” The owner (user) is the file’s owner, the group is the assigned group, and others means all remaining users not in the owner or group categories. When you look at permissions with a command like ls -l, you see three sets of permission bits corresponding to these three categories, and chmod uses shortcuts like u, g, and o to adjust them. While people sometimes say “public” or “world” to mean everyone else, the formal category name in Linux is others. The other options use terms that aren’t part of the Linux permission model. For example, a typical permission string shows what each category can do (read, write, execute) for owner, group, and others.