Linux User Password Reset for Support Specialists

1. Which field in /etc/shadow contains the password hash?

First field

Second field

Third field

Fourth field

2. Which utility displays password expiration information for a user?

Passwd -l

Chage -l username

Lastlog

Finger

3. What is the purpose of password aging in Linux systems?

To delete old user accounts

To force users to change passwords regularly for security

To limit user login time

To prevent account creation

4. How are failed login attempts typically logged in Linux?

/var/log/auth.log or /var/log/secure

/var/log/messages

/var/log/system

/var/log/login

5. What does the 'usermod' command do in password management?

Changes user account properties including shell

Resets the user's password directly

Deletes user accounts

Lists all user passwords

6. When resetting a user's password, what security best practice should be followed?

Set a temporary password and force a change on next login

Use the same password for all users

Store passwords in plain text files

Never require password changes

7. Which file typically contains PAM configuration rules?

/etc/pam.conf or /etc/pam.d/

/etc/authentication

/etc/security

/etc/login.config

8. What is PAM in the context of Linux authentication?

Password Authentication Manager

Pluggable Authentication Modules

Personal Access Manager

Protocol Authentication Mechanism

9. How can password expiration policies be enforced in Linux?

Using the 'chage' command

Editing /etc/login.defs

Both A and B

Using only the passwd command

10. What does 'passwd -e username' do?

Encrypts the password

Expires the user's password immediately

Enables password history

Checks password expiration

11. Which command is used to change a user's password in Linux?

Chpass

Passwd

Setpass

Modpass

12. What is the default password hashing algorithm in modern Linux systems?

MD5

SHA-256 or SHA-512

DES

Base64

13. How can a systems support specialist unlock a locked user account?

Use 'passwd -u username' with sudo

Delete and recreate the account

Reboot the system

Use 'unlock username' command

14. What does 'passwd -l username' do?

Locks the user account

Lists the user's password

Changes the user's login shell

Logs the user out

15. Which tool is used to safely edit the sudoers file?

Nano /etc/sudoers

Vi /etc/sudoers

Visudo

Edit /etc/sudoers

16. What is the purpose of the '/etc/sudoers' file?

Stores all user passwords

Defines which users can execute commands with sudo

Lists active login sessions

Contains system configuration settings

17. If a user forgets their password, which method can a systems support specialist use to reset it?

Use 'passwd username' with sudo privileges

Delete the user account and recreate it

Boot into single-user mode without authentication

Access the /etc/shadow file directly

18. What does the 'sudo' command allow a user to do?

Switch to another user account

Execute commands with superuser privileges

Change the system hostname

View encrypted passwords

19. Which permission level is required to reset another user's password?

User permissions

Group permissions

Root or sudo privileges

File owner permissions

20. What file stores encrypted user password hashes in modern Linux systems?

/etc/passwd

/etc/shadow

/etc/password

/etc/crypt

Systems Support Specialist Resetting a Linux User Password Quiz