CompTIA Linux+ XK0-006 (V8) Practice Question

Applying the sticky bit (chmod +t) to a directory tells the kernel that only the directory's owner, the file's owner, or root may unlink or rename entries within that directory. Because the directory can still be world-writable, all users can create and edit their own files, yet they cannot remove or rename files created by others.

The setgid bit influences the group ownership of newly created files but does not stop users who have write permission on the directory from deleting each other's files.

Marking the directory append-only with chattr +a prevents anyone (including the file owner) from deleting or truncating files, which is more restrictive than required.

Removing group write permission would prevent users from creating files altogether, contradicting the stated need.