010-160 System Security & User Permissions 2

Question 1

Which command displays the current user's group memberships?

Accepted Answer

groups

Answer

The `groups` command lists all groups the current user belongs to.

Question 2

What does the sticky bit do when set on a directory?

Accepted Answer

Allows only the file owner to delete files within it

Answer

The sticky bit on a directory restricts file deletion so only the file's owner (or root) can remove it.

Question 3

Which numeric permission value grants read, write, and execute to the owner only?

Accepted Answer

700

Answer

700 gives rwx (7) to the owner and no permissions (0,0) to group and others.

Question 4

What is the purpose of the /etc/shadow file?

Accepted Answer

Holds encrypted user passwords

Answer

/etc/shadow stores hashed passwords and password aging information, readable only by root.

Question 5

Which command changes the group ownership of a file?

Accepted Answer

chgrp

Answer

`chgrp` changes the group owner of a file or directory.

(010-160) LPI Linux Essentials Practice Test