Free CompTIA XK0-006 Practice Questions & Answers 2026 Part2 | CompTIA Linux+

Which of the following is a characteristic of Python 3?

A Linux administrator installs the httpd service but wants to prevent it from running until it is configured. Which of the following is the best way to accomplish this task?

Which of the following cryptographic functions ensures a hard drive is encrypted when not in use?

Which of the following describes the method of consolidating system events to a single location?

Which of the following best describes journald?

When attempting to terminate a process by name rather than PID, which command is most suitable to ensure all instances are stopped at once?

Which of the following is a characteristic of Python 3?

A DevOps engineer wants to make a copy of a coworker's existing repositories to a sandbox machine. Which of the following commands should the engineer use to accomplish this task?

Which of the following best describes a use case for playbooks in a Linux system?

A systems administrator wants to review the logs from an Apache 2 error.log file in real time and save the information to another file for later review. Which of the following commands should the administrator use?

Which of the following is a characteristic of Python 3?

A Linux administrator wants to add a user to the Docker group without changing their primary group. Which of the following commands should the administrator use to complete this task?

A Linux systems administrator needs to extract the contents of a file named /home/dev/web.bkp to the /var/www/html/ directory. Which of the following commands should the administrator use?

A Linux administrator receives reports that an application hosted in a system is not completing tasks in the allocated time. The administrator connects to the system and obtains the following details:Which of the following actions can the administrator take to help speed up the jobs?

Regular users of a Linux server are reporting issues with updating their passwords. Given the following outputs: $ passwd Current password: New password: Retype new password: passwd: Authentication token manipulation error passwd: password unchanged $ ls -l /usr/bin/passwd -rwxr-xr-x 1 root root 59976 Nov 24 2023 /usr/bin/passwd Which of the following commands should a server administrator use to fix this issue?

A Linux administrator wants to make the enable_auth variable set to 1 and available to the environment of subsequently executed commands. Which of the following should the administrator use for this task?

Which of the following is a characteristic of Python 3?

A systems administrator wants to review the logs from an Apache 2 error.log file in real time and save the information to another file for later review. Which of the following commands should the administrator use?

A Linux administrator wants to use AI to deploy infrastructure as code.

An administrator updates the network configuration on a server but wants to ensure the change will not cause an outage if something goes wrong. Which of the following commands allows the administrator to accomplish this goal?

Which of the following network types allows a VM to use the physical network connection independent of the host machine?

Which of the following is a characteristic of Python 3?

A Linux administrator observes low network throughput. The administrator gathers the following output:$ ip link show eth0eth0:mtu 9000 ...$ ping -s 1472 -M do 192.168.10.2PING 192.168.10.2(192.168.10.2) 1472(1500) bytes of data.From 10.10.9.72 icmp_seq=1 frag needed and DF setWhich of the following is the cause of the low network throughput?

Which of the following formats is used to write an Ansible playbook?

A Linux administrator wants to add a user to the Docker group without changing their primary group. Which of the following commands should the administrator use to complete this task?

Which of the following command sequences is used to install Linux software directly from source code?

A systems administrator wants to review the logs from an Apache 2 error.log file in real time and save the information to another file for later review. Which of the following commands should the administrator use?

A Linux user needs to download the latest Debian image from a Docker repository. Which of the following commands makes this task possible?

A systems administrator wants to review the logs from an Apache 2 error.log file in real time and save the information to another file for later review. Which of the following commands should the administrator use?

Which of the following best describes journald?

A user reports recurrent issues with an application, which is currently operational. The systems administrator gathers the following outputs to diagnose the issue: Out of memory: Kill process (mariadb) Killed process (mariadb) mariadb invoked oom-killer egrep 'Out of memory' /var/log/messages Multiple entries showing mariadb being killed by OOM killer free -m Mem: total 15819, used 10026, free 5174, available 5134 Swap: 0 0 0 sar -r kbmemused ~67%, no swap usage Which of the following is a possible cause of this issue? The correct answer is D. The process is showing signs of a memory leak because the logs clearly indicate repeated activation of the OOM (Out Of Memory) killer, specifically targeting the mariadb process. The OOM killer is triggered when the Linux kernel determines that the system is running critically low on memory and must terminate processes to maintain system stability. The repeated log entries showing mariadb invoked oom-killer and multiple instances of the process being killed strongly suggest that this application is consuming increasing amounts of memory over time without releasing it properly. This is a classic symptom of a memory leak, where an application continuously allocates memory but fails to free it, eventually exhausting available system resources. The free -m output shows that while there is still some free memory, swap space is completely unused (0 total). This means the system has no fallback memory, making it more susceptible to OOM conditions. However, the absence of swap alone does not explain why a specific process is repeatedly being killed. Option A is incorrect because there is no indication of a backup process consuming memory. Option B is incorrect because the system is not using swap at all. Option C is incorrect because cached memory is reclaimable by the kernel and does not typically trigger the OOM killer. From a Linux+ troubleshooting perspective, identifying repeated OOM events tied to a specific process is a strong indicator of inefficient memory handling or a memory leak. Administrators should investigate the application, apply updates or patches, or restart the service periodically while implementing proper monitoring and possibly adding swap space as a temporary mitigation.

Which of the following references is recognized and used for guiding the configuration of operating systems and applications to ensure compliance with security best practices on Linux servers?

An administrator needs to create a new logical volume from sets of provisioned disks. Which of the following shows the correct order of commands the administrator should execute?

A systems administrator is working on a firewall configuration and needs to deny all inbound connections except for the standard SSH port. Which of the following commands should the administrator use for this task? ​(Select two)

A systems administrator receives reports about connection issues to a secure web server. Given the following firewall and web server outputs:Which of the following commands best resolves this issue?

A systems administrator wants to review the logs from an Apache 2 error.log file in real time and save the information to another file for later review. Which of the following commands should the administrator use?

While reviewing local accounts on a server, a Linux administrator discovers that multiple users have not changed their passwords in more than a year. Which of the following commands should the administrator execute to bring the users' accounts into compliance with the 90-day guideline?

Which of the following best describes a use case for playbooks in a Linux system?

A Linux server is not starting up because files in the /boot/ partition are corrupt. After the initial GRUB screen, the following message is displayed:

A Linux administrator wants to add a user to the Docker group without changing their primary group. Which of the following commands should the administrator use to complete this task?

Which of the following technologies is used to authenticate users on a Linux server when working in a Windows domain?

Which of the following commands is used to display detailed information about block devices on a Linux system?

Which of the following filesystems contains non-persistent or volatile data?

A Linux administrator receives reports that an application hosted in a system is not completing tasks in the allocated time. The administrator connects to the system and obtains the following details:Which of the following actions can the administrator take to help speed up the jobs?

A Linux administrator installed a new program inside $HOME/.local/bin and is trying to execute it without using an absolute path. Which of the following should the administrator use for this task?

To perform a live migration, which of the following must match on both host servers? (Choose two).

A Linux user needs to download the latest Debian image from a Docker repository. Which of the following commands makes this task possible?

A Linux administrator wants to add a user to the Docker group without changing their primary group. Which of the following commands should the administrator use to complete this task?