Linux Plus V7 Security Practices Quiz

1. True or False: By default, SSH allows root login via password authentication.

True

False

2. True or False: The umask value of 0022 results in new files having 755 permissions.

True

False

3. Which command is used to set password expiration policies for a user?

Chage

Passwd -e

Usermod -p

Shadow -e

4. What is the purpose of password aging in Linux?

Forces users to change passwords periodically

Locks old user accounts

Archives password history

Encrypts password files

5. Which command checks the status of SELinux on a system?

Getenforce

Setenforce

Sestatus

Secheck

6. True or False: AppArmor and SELinux can be enabled simultaneously on the same system.

True

False

7. What does SELinux provide for Linux systems?

Mandatory Access Control (MAC)

File compression

Network routing

Disk encryption

8. Which tool is commonly used to manage firewall rules on Linux?

Iptables or firewalld

Netstat

Ifconfig

Route

9. What is the primary function of a firewall on a Linux system?

Encrypts all network traffic

Controls incoming and outgoing network traffic

Monitors system logs

Manages user accounts

10. Which command generates an SSH key pair for public key authentication?

Ssh-keygen

Ssh-copy-id

Ssh-agent

Ssh-keypass

11. What Linux command displays the current user's permissions on a file?

Ls -l

Stat

Chmod

Umask

12. Which file contains SSH server configuration settings?

/etc/ssh/ssh_config

/etc/ssh/sshd_config

/etc/openssh/config

/etc/security/ssh

13. What encryption protocol is preferred for secure remote login on Linux systems?

Telnet

SSH

FTP

HTTP

14. Which command configures sudo access rules for users?

Visudo

Sudoedit

Sudo -l

Suauth

15. What does the sticky bit do when applied to a directory?

Only the owner can delete files in it

Prevents directory modification

Enables group write access

Hides directory contents

16. True or False: The root user can be locked out by setting an invalid shell in /etc/passwd.

True

False

17. Which command is used to add a user account to a secondary group?

Usermod -a -G groupname username

Useradd -g groupname username

Groupadd username groupname

Passwd -G groupname username

18. What is the purpose of the setuid bit on an executable file?

Prevents file deletion

Allows execution with owner's privileges

Restricts group access

Enables file encryption

19. Which file stores encrypted user password hashes on most Linux systems?

/etc/passwd

/etc/shadow

/etc/security

/var/log/auth

20. In octal notation, what do the three digits represent when setting file permissions with chmod?

User, group, world

Read, write, execute

Owner, setuid, sticky

File type, mode, attributes

Linux Plus V7 Security Practices Quiz

1. True or False: By default, SSH allows root login via password authentication.

2.

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

2. True or False: The umask value of 0022 results in new files having 755 permissions.

3. Which command is used to set password expiration policies for a user?

4. What is the purpose of password aging in Linux?

5. Which command checks the status of SELinux on a system?

6. True or False: AppArmor and SELinux can be enabled simultaneously on the same system.

7. What does SELinux provide for Linux systems?

8. Which tool is commonly used to manage firewall rules on Linux?

9. What is the primary function of a firewall on a Linux system?

10. Which command generates an SSH key pair for public key authentication?

11. What Linux command displays the current user's permissions on a file?

12. Which file contains SSH server configuration settings?

13. What encryption protocol is preferred for secure remote login on Linux systems?

14. Which command configures sudo access rules for users?

15. What does the sticky bit do when applied to a directory?

16. True or False: The root user can be locked out by setting an invalid shell in /etc/passwd.

17. Which command is used to add a user account to a secondary group?

18. What is the purpose of the setuid bit on an executable file?

19. Which file stores encrypted user password hashes on most Linux systems?

20. In octal notation, what do the three digits represent when setting file permissions with chmod?