010-160 Users and Group Management 4

Question 1

What does the 'w' command show when run on a Linux system?

Accepted Answer

Who is logged in and what they are doing

Answer

The w command displays currently logged-in users, their terminals, login times, and the commands they are running.

Question 2

A user's entry in /etc/shadow shows '!' before the password hash. What does this mean?

Accepted Answer

The account is locked

Answer

A '!' prefix on the password hash in /etc/shadow indicates the account is locked and cannot be used for password authentication.

Question 3

Which command would you use to see the password aging information for a user?

Accepted Answer

chage -l username

Answer

chage -l displays the password aging details including last change date, expiry date, and inactivity period.

Question 4

What is the effect of setting a user's shell to /sbin/nologin?

Accepted Answer

The user cannot log in interactively

Answer

/sbin/nologin prints a message and rejects interactive login attempts, commonly used for service accounts.

Question 5

Which file format stores group name, GID, and member list on a Linux system?

Accepted Answer

/etc/group

Answer

/etc/group stores each group's name, password placeholder, GID, and comma-separated list of member usernames.

(010-160) LPI Linux Essentials Practice Test