Dec-2025 CompTIA XK0-006 Actual Questions and 100% Cover Real Exam Questions
XK0-006 Free Exam Questions and Answers PDF Updated on Dec-2025
NEW QUESTION # 40
A Linux systems administrator is resolving a privileged access issue for users who are members of an admin group. Which of the following configuration files should the administrator update so the users in the admin group will have root privileged access to the Linux system?
- A. /etc/sudoers
- B. /etc/login.defs
- C. /etc/shadow
- D. /etc/group
Answer: A
Explanation:
The /etc/sudoersfile controls which users and groups can elevate privileges via sudo. By adding a line such as %admin ALL=(ALL) ALLto /etc/sudoers, members of the admin group gain root-level access.
NEW QUESTION # 41
A newly hired Linux administrator needs to grant access to the Linux servers by generating a password-protected RSA key of 4096 bytes. Which of the following commands will accomplish this task?
- A. ssh-keygen -k rsa -l 4096 -p
- B. ssh-keygen -t dsa -B 4096
- C. ssh-keygen -t rsa -b 4096
- D. ssh-keygen -RPb 4096
Answer: C
Explanation:
The ssh-keygencommand is used to generate SSH key pairs. To generate an RSA key with a length of 4096 bits, the correct syntax is:
1.-t rsa: Specifies the type of key to generate, which is RSA.
2.-b 4096: Specifies the number of bits for the key, in this case 4096.
By running this command, the user will be prompted to enter a passphrase to password-protect the key, which satisfies the requirement for generating a password-protected RSA key of 4096 bits.
NEW QUESTION # 42
Which of the following is a characteristic of Python 3?
- A. It is fully backwards compatible.
- B. It is binary compatible with Java.
- C. It is closed source.
- D. It is extensible through modules.
Answer: D
Explanation:
Python 3 is open source and supports extensibility through modules and packages, allowing developers to add functionality easily. It is not fully backward compatible with Python 2 and has no binary compatibility with Java.
NEW QUESTION # 43
After system startup, the X Window System GUI login interface is not displaying. Which of the following commands ensures that the GUI is started during the system startup process?
- A. systemctl enable xwindow.service
- B. systemctl unmask xwindow.service
- C. systemctl isolate graphical.target
- D. systemctl set-default graphical.target
Answer: D
Explanation:
Setting the default target to graphical.targettells systemd to boot into the graphical interface on startup. The command systemctl set-default graphical.targetmakes the GUI login display automatically at boot.
NEW QUESTION # 44
Which of the following commands should an administrator use to convert a KVM disk file to a different format?
- A. qemu-kvm
- B. qemu-ng
- C. qemu-io
- D. qemu-img
Answer: D
Explanation:
The qemu-img command is used to create, convert, and manage disk image files for KVM/QEMU. It allows conversion between formats such as qcow2, raw, and vmdk.
NEW QUESTION # 45
A DevOps engineer made some changes to files on a local repository. The engineer realizes that the changes broke the application and the changes need to be reverted back. Which of the following commands is the best way to accomplish this task?
- A. git rebase
- B. git reset
- C. git pull
- D. git stash
Answer: B
Explanation:
The git reset command reverts changes in the local repository to a previous commit, effectively discarding the problematic modifications and restoring the application to a working state.
NEW QUESTION # 46
Following the completion of monthly server patching, a Linux administrator receives reports that a critical application is not functioning. Which of the following commands should help the administrator determine which packages were installed?
- A. dnf search
- B. dnf info
- C. dnf list
- D. dnf history
Answer: D
Explanation:
The dnf history command shows a log of past package operations (install, update, remove), allowing the administrator to review which packages were installed or updated during the patching process.
NEW QUESTION # 47
Which of the following actions is required to establish passwordless SSH authentication?
- A. Copy the public SSH key to the remote server.
- B. Copy the public and private keys to the remote server.
- C. Copy the private SSH key to the remote server.
- D. Generate public and private keys on the remote server.
Answer: A
Explanation:
Copying the public SSH key to the remote server's authorized_keys file is all that's needed to enable passwordless SSH authentication.
NEW QUESTION # 48
Which of the following most accurately describes a webhook?
- A. An authentication method for web-server communication
- B. An HTTP-based callback function
- C. A means to transmit sensitive information between systems
- D. An SNMP-based API for network device monitoring
Answer: B
Explanation:
A webhook is an HTTP-based callback that allows one system to send real-time data or notifications to another system when an event occurs.
NEW QUESTION # 49
Which of the following passwords is the most complex?
- A. HeSaidShetold
- B. he$@ID$heTold
- C. H3s@1dSh3t0|d
- D. H3sa1dt01d
Answer: C
Explanation:
This password is the most complex because it uses uppercase and lowercase letters, numbers, and multiple special characters, making it significantly harder to guess or brute-force compared to the others.
NEW QUESTION # 50
Which of the following best describes journald?
- A. A system service that collects and stores logging data
- B. A feature that creates crash dumps in case of kernel failure
- C. A service responsible for keeping the filesystem journal
- D. A service responsible for writing audit records to a disk
Answer: A
Explanation:
journald is part of systemd and is responsible for collecting, storing, and managing log data from various sources such as the kernel, services, and applications.
NEW QUESTION # 51
An administrator receives reports that a web service is not responding. The administrator reviews the following outputs:
Which of the following is the reason the web service is not responding?
- A. The private key has the incorrect permissions and should be changed to 0755for the service.
- B. The private key does not match the public key, and both keys should be replaced.
- C. The private key is not in the correct location and needs to be moved to the correct directory.
- D. The private key needs to be renamed from server.crtto server.keyso the service can find it.
Answer: C
Explanation:
The error log shows "cannot load certificate key /etc/pki/nginx/private/server.key", but the listing reveals that server.key is located in /etc/pki/nginx/ rather than the expected /etc/pki/nginx/private/ directory. Since the file exists but not where Nginx is configured to look, moving it to the correct directory resolves the issue.
NEW QUESTION # 52
SIMULATION 1
A new drive was recently added to a Linux system. Using the environment and tokens provided, complete the following tasks:
- Create an appropriate device label.
- Format and create an ext4 file system on the new partition.
The current working directory is /.
INSTRUCTIONS
Use the drop-down menus to select the proper objects to complete these tasks.
Some commands are partially complete.
Not all objects will be used, and some may be used more than once.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
Explanation:
mklabel gpt initializes the new disk /dev/sdc with a GPT partition table.
mkpart primary ext4 1 10G creates a primary partition using the ext4 type between 1MB and
10GB on /dev/sdc.
mkfs.ext4 /dev/sdc1 formats the newly created partition /dev/sdc1 with the ext4 filesystem, completing the setup.
NEW QUESTION # 53
An administrator must secure an account for a user who is going on extended leave. Which of the following steps should the administrator take? (Choose two).
- A. Set the user's files to immutable.
- B. Change the user's shell to /sbin/nologin.
- C. Run the command passwd -l user.
- D. Instruct the user to log in once per week.
- E. Change the date on the /homefolder to that of the expected return date.
- F. Delete the user's /homefolder.
Answer: B,C
Explanation:
passwd -l user locks the user's account by disabling the password, preventing logins.
Change the user's shell to /sbin/nologin ensures the account cannot be used for interactive logins, further securing it.
NEW QUESTION # 54
A systems administrator wants to prevent the current contents of a file from being overwritten and wants to allow new additions at the end of the file. Which of the following commands should the administrator use?
- A. setfacl -m m::t file
- B. setenforce file
- C. chmod +t file
- D. chattr +a file
Answer: D
Explanation:
The chattr +a command sets the append-only attribute on a file. This prevents overwriting or deletion of existing contents, while still allowing new data to be appended to the end of the file.
NEW QUESTION # 55
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