12. Which of the following permissions are set on the /tmp/ directory?
Answer: A
The permissions set on the /tmp/ directory are rwxrwxrwt.
The /tmp/ directory is set with the permissions rwxrwxrwt, which means it is readable, writable, and executable by all users, while the "t" at the end indicates the sticky bit is set, allowing only the owner of a file to delete or modify it.
A) rwxrwxrwt
This option is correct as it accurately describes the permissions of the /tmp/ directory. The rwxrwxrwt notation indicates that all users can read, write, and execute files within this directory, while the sticky bit ensures that users can only delete their own files.
B) -------rwx
This option is incorrect because it suggests that no permissions are granted to the owner or group, which contradicts the actual permissions of the /tmp/ directory. The /tmp/ directory must allow read, write, and execute permissions to all users, not just the last three users as indicated here.
C) rwxrw-r--
This option is also incorrect as it only provides read, write, and execute permissions to the owner and group, with no permissions for others. The /tmp/ directory should have permissions set for all users, which this option fails to reflect.
D) rwx------
This option is incorrect as it grants all permissions only to the owner and excludes both the group and others. The /tmp/ directory requires broader access rights for all users, which this option does not fulfill.
E) r-xr-x---t
This option is incorrect since it suggests that the directory is not writable by the owner and has limited permissions for others. The permissions for the /tmp/ directory must allow all users to write, which is not the case here.
Conclusion
The permissions rwxrwxrwt clearly demonstrate that the /tmp/ directory is designed for shared access among all users, with the sticky bit providing an additional layer of security. All other options fail to meet the requirements for the /tmp/ directory, either by restricting access or misrepresenting the permissions. Therefore, option A is the only correct representation of the permissions set on the /tmp/ directory.