Linux+ V7 User Authentication Methods Quiz

1. Which command generates an SSH key pair for a user?

Ssh-keygen

Ssh-copy-id

Ssh-agent

Ssh-add

2. Which SSH configuration parameter disables password-based authentication entirely?

PasswordAuthentication no

PubkeyAuthentication yes

PermitRootLogin no

AllowUsers *

3. True or False: The pam_unix.so module is responsible for all authentication on a Linux system.

True

False

4. What does the PASS_MIN_LEN parameter control in /etc/login.defs?

Maximum password length

Minimum password length

Password aging interval

Password history count

5. Which utility copies an SSH public key to a remote system's authorized_keys file?

Ssh-keygen

Ssh-copy-id

Scp

Rsync

Submit

7. True or False: SSH allows password authentication and key-based authentication simultaneously on the same server.

True

False

8. Which file contains PAM configuration rules for system services?

/etc/pam.d/

/etc/security/

/etc/auth/

/etc/login.defs

9. What is the primary advantage of using SSH key-based authentication over password authentication?

Keys are easier to remember

Keys are immune to brute-force attacks

Keys work without network connectivity

Keys eliminate the need for PAM

Submit

11. Which authentication method uses public and private key pairs for secure remote login?

SSH key-based authentication

Password authentication

Kerberos tickets

LDAP binding

12. True or False: The /etc/passwd file should never contain any sensitive user information.

True

False

13. Which PAM module type enforces password complexity requirements?

Pam_unix.so

Pam_cracklib.so

Pam_limits.so

Pam_wheel.so

14. What is the purpose of the /etc/login.defs file?

Define default login shell for all users

Set system-wide password and login policies

Configure PAM modules

Store SSH server configuration

Submit

16. Which authentication method transmits credentials in plaintext and is considered insecure?

SSH with key pairs

Telnet authentication

Kerberos authentication

LDAP over TLS

17. What does the chage command manage on a Linux system?

User login shells

Password expiration and aging policies

SSH key permissions

Group membership changes

Submit

19. Which file stores encrypted user passwords on a Linux system?

/etc/passwd

/etc/shadow

/etc/group

/etc/gshadow

20. What is the primary function of the PAM (Pluggable Authentication Modules) framework?

Encrypt user passwords in the shadow file

Provide a modular interface for authentication services

Replace the /etc/passwd file entirely

Manage sudo privileges exclusively

Linux+ V7 Linux User Authentication Methods Quiz

1. Which command generates an SSH key pair for a user?

2.

What first name or nickname would you like us to use?

2. Which SSH configuration parameter disables password-based authentication entirely?

3. True or False: The pam_unix.so module is responsible for all authentication on a Linux system.

4. What does the PASS_MIN_LEN parameter control in /etc/login.defs?

5. Which utility copies an SSH public key to a remote system's authorized_keys file?

6. The /etc/pam.d/login file controls authentication for ____ sessions.

7. True or False: SSH allows password authentication and key-based authentication simultaneously on the same server.

8. Which file contains PAM configuration rules for system services?

9. What is the primary advantage of using SSH key-based authentication over password authentication?

10. The PASS_MAX_DAYS parameter in /etc/login.defs specifies the maximum number of ____ before password expiration.

11. Which authentication method uses public and private key pairs for secure remote login?

12. True or False: The /etc/passwd file should never contain any sensitive user information.

13. Which PAM module type enforces password complexity requirements?

14. What is the purpose of the /etc/login.defs file?

15. The default SSH public key file for a user is located at ____.

16. Which authentication method transmits credentials in plaintext and is considered insecure?

17. What does the chage command manage on a Linux system?

18. The /etc/shadow file is readable only by the ____ user.

19. Which file stores encrypted user passwords on a Linux system?

20. What is the primary function of the PAM (Pluggable Authentication Modules) framework?