LFCS Certification User and Group Management 3

Question 1

A sysadmin runs 'groupmod -n webteam developers'. What is the result?

Accepted Answer

The group named 'developers' is renamed to 'webteam'

Answer

groupmod -n new_name old_name renames the existing group without changing its GID or membership.

Question 2

Which /etc/login.defs parameter controls the default minimum number of days before a user can change their password?

Accepted Answer

PASS_MIN_DAYS

Answer

PASS_MIN_DAYS in /etc/login.defs sets the system-wide default for the minimum number of days between password changes.

Question 3

How can you list all members of the 'sudo' group without opening /etc/group manually?

Accepted Answer

getent group sudo

Answer

getent group sudo queries the group database (including NSS sources like LDAP) and displays the group entry including all members.

Question 4

A user's account is locked using 'passwd -l username'. Which character appears at the start of the password hash in /etc/shadow to indicate this?

Accepted Answer

!

Answer

passwd -l prepends a '!' to the hashed password in /etc/shadow, preventing password-based authentication while leaving the hash intact.

Question 5

Which command would you use to view password aging information for a specific user?

Accepted Answer

chage -l username

Answer

chage -l username displays all password aging fields — last change, minimum, maximum, warning, inactive, and expiry dates — in a human-readable format.

LFCS Certification Practice Test

LFCS Certification Practice Test

LFCS Certification User and Group Management 3