Linux User Management 3

Question 1

What command sets a user's account expiration date to January 1, 2025?

Accepted Answer

chage -E 2025-01-01 username

Answer

chage -E sets the account expiration date using YYYY-MM-DD format.

Question 2

Which command creates a new group called 'developers'?

Accepted Answer

groupadd developers

Answer

groupadd is the standard command to create a new group on Linux systems.

Question 3

What does the `/etc/skel` directory contain?

Accepted Answer

Template files copied to new users' home directories

Answer

/etc/skel contains template files (like .bashrc) that are copied into a new user's home directory at creation.

Question 4

How do you add an existing user 'alice' to the supplementary group 'sudo' without removing her from other groups?

Accepted Answer

usermod -aG sudo alice

Answer

usermod -aG appends the group without replacing existing supplementary group memberships.

Question 5

Which /etc/shadow field stores the number of days since epoch when the password was last changed?

Accepted Answer

Field 3

Answer

The third field in /etc/shadow records the date of last password change as days since January 1, 1970.

Linux Practice Test