Linux User Management 2

Question 1

Which file stores the encrypted password hashes for user accounts on a modern Linux system?

Accepted Answer

/etc/shadow

Answer

/etc/shadow stores encrypted password hashes and is readable only by root.

Question 2

What does the `-r` flag do when used with the `userdel` command?

Accepted Answer

Removes the user's home directory and mail spool

Answer

userdel -r removes the user account along with their home directory and mail spool.

Question 3

Which command would you use to lock a user account so they cannot log in?

Accepted Answer

usermod -L username

Answer

usermod -L locks the account by prepending a '!' to the password hash in /etc/shadow.

Question 4

What is the default UID assigned to the root user on Linux?

Accepted Answer

0

Answer

Root always has UID 0, which grants it superuser privileges on the system.

Question 5

Which command displays the groups a specific user belongs to?

Accepted Answer

groups username

Answer

The `groups username` command lists all groups the specified user is a member of.

Linux Practice Test