LFCS User and Group Management Questions and Answers

Question 1

A system administrator needs to add an existing user, 'testuser', to an existing supplementary group called 'developers'.
Which of the following commands will achieve this without removing the user from their current supplementary groups?

Accepted Answer

usermod -aG developers testuser

Answer

usermod -G developers testuser

Answer

usermod -g developers testuser

Answer

useradd -G developers testuser

Question 2

Which file should be modified to set the default password aging policies, such as `PASS_MAX_DAYS`, for all newly created users on a Linux system?

Accepted Answer

/etc/login.defs

Answer

/etc/passwd

Answer

/etc/shadow

Answer

/etc/default/useradd

Question 3

A temporary user account named 'contractor' needs to be created, and it must automatically be disabled on a specific date. Which command correctly creates the user with an expiration date of December 31, 2026?

Accepted Answer

useradd -e 2026-12-31 contractor

Answer

chage -E 2026-12-31 contractor

Answer

usermod -L 2026-12-31 contractor

Answer

useradd --disable-date 2026-12-31 contractor

Question 4

A user, 'jdoe', reports that they cannot access files owned by the 'editors' group. You need to change 'jdoe's' primary group to 'editors'. Which command accomplishes this?

Accepted Answer

usermod -g editors jdoe

Answer

usermod -G editors jdoe

Answer

groupmod -n editors jdoe

Answer

newgrp editors jdoe

Question 5

As a system administrator, you need to create a new group named 'auditors' with a specific Group ID (GID) of 2005. Which of the following commands is the correct way to do this?

Accepted Answer

groupadd -g 2005 auditors

Answer

groupadd -i 2005 auditors

Answer

addgroup --gid 2005 auditors

Answer

newgroup -g 2005 auditors

Question 6

After creating a new user, you are tasked with setting their password to expire in 90 days, warning them 14 days before it expires, and locking the account 7 days after it expires. Which command is best suited for modifying all these password aging attributes for an existing user?

Accepted Answer

chage

Answer

useradd

Answer

usermod

Answer

passwd

A system administrator needs to add an existing user, 'testuser', to an existing supplementary group called 'developers'.Which of the following commands will achieve this without removing the user from their current supplementary groups?

A system administrator needs to add an existing user, 'testuser', to an existing supplementary group called 'developers'.
Which of the following commands will achieve this without removing the user from their current supplementary groups?