CompTIA Linux+ Certification - XK0-006 Exam Questions

QUESTION NO: 1
A Linux administrator just finished setting up passwordless SSH authentication between two nodes. However, upon test validation, the remote host prompts for a password. Given the following logs:

Which of the following is the most likely cause of the issue?

QUESTION NO: 2
The security manager at a company notifies a systems administrator of open vulnerabilities on the Linux system. The administrator receives the following information while logged in to the server:

Which of the following is the most likely security concern?

QUESTION NO: 3
Customers are unable to send emails to a company's domain When searching the naming service, they receive the following error message:

Which of the following is a valid reason for this error?

QUESTION NO: 4
A Linux systems administrator makes updates to systemd-managedservice configuration files.
Which of the following commands should the administrator execute in order to implement the changes?

QUESTION NO: 5
A systems technician needs to install a third-party software package. Which of the following commands would allow the technician to download this software package from a remote server?

QUESTION NO: 6
A systems administrator needs to report the IP addresses of the users currently connected to the server. Which of the following commands should the administrator use to find the required information?

QUESTION NO: 7
An administrator has generated an RSA SSH key pair to log in to a remote server. After copying the public key and attempting to log in, the administrator sees the following message:
[email protected]: Permission denied (publickey,password)
After seeing the message, the administrator attempts to connect using ssh -v [email protected] and notices the following debug output:
debug1: send_pubkey_test: no mutual signature algorithm
Which of the following actions should the administrator take first to remediate this issue?

QUESTION NO: 8
Which of the following does dmesgdisplay?

QUESTION NO: 9
A Linux administrator wants to use AI to deploy infrastructure as code. Which of the following is a best practice regarding the use of AI for this task?

QUESTION NO: 10
Which of the following best describes a benefit of using a Python virtual environment?

QUESTION NO: 11
While hardening a system, an administrator runs a port scan with Nmap, which returned the following output:

Which of the following is the best way to address this security issue?

QUESTION NO: 12
A systems administrator needs to write a script that counts the number of times "FAIL" appears in a log file. If "FAIL" appears zero times, then the administrator would like to print the message
"SUCCESS." Given the following:

Which of the following should be used before the zero to complete the script?

QUESTION NO: 13
A Linux user frequently tests shell scripts located in the /home/user/scriptsdirectory. Which of the following commands allows the user to run the program by invoking only the script name?

QUESTION NO: 14
Which of the following best describes a use case for playbooks in a Linux system?

QUESTION NO: 15
An administrator needs to append the output of a Linux command to an existing file for later analysis. Which of the following command-line strings should the administrator use?