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CompTIA XK0-006 Exam Syllabus Topics:

Topic	Details
Topic 1	Troubleshooting: Addresses diagnosing and resolving issues across system health, hardware, storage, networking, security configurations, and performance optimization.
Topic 2	Security: Focuses on securing Linux systems through authentication, firewalls, OS hardening, account policies, cryptography, and compliance checks.
Topic 3	Automation, Orchestration, and Scripting: Covers task automation with tools like Ansible, shell and Python scripting, Git version control, and responsible AI-assisted development.
Topic 4	Services and User Management: Covers day-to-day Linux administration including file management, user accounts, processes, software, services, and container operations.

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CompTIA Linux+ Certification Exam Sample Questions (Q152-Q157):

NEW QUESTION # 152
A systems administrator is having issues installing packages in a Linux system. The administrator receives the following outputs:

Which of the following is the best command to fix this issue?

A. setenforce 0
B. touch /etc/pki/tls/certs/ca-bundle.crt
C. dnf reinstall ca-certificates
D. restorecon -R /etc/pki/ca-trust/extracted/pem

Answer: D

Explanation:
The CA bundle path is a symlink to a file under /etc/pki/ca-trust/extracted/pem, and update-ca- trust cannot create that generated bundle while SELinux is enforcing. Restoring the default SELinux contexts on that directory allows the bundle file to be created and fixes the certificate verification failures during package installs.

NEW QUESTION # 153
A user reports issues when trying to connect to one of the Linux servers. The server administrator reviews the following outputs:

Which of the following statements describes the cause and resolution for this issue?

A. The system has crashed and needs to be rebooted to fix the issue.
B. The current kernel is corrupted and should be reinstalled.
C. The messages point to a hardware issue that should be addressed by the server team.
D. All available CPUs have been exhausted, and a new CPU should be added.

Answer: C

Explanation:
The logs show machine check exceptions and a fatal machine check kernel panic, which indicate hardware-level errors detected by the CPU. These errors are typically related to faulty hardware components and must be investigated and resolved by the server or hardware support team rather than through software remediation.

NEW QUESTION # 154
Which of the following is the first step when starting a new Python project on a Linux system?

A. export PYTHON_PATH:/path/to/project
B. python -m pip install -r /path/to/project
C. python -m source /path/to/project
D. python -m venv /path/to/project

Answer: D

Explanation:
Creating a virtual environment is the first step because it provides an isolated Python runtime for the project, allowing dependencies to be managed independently without affecting the system- wide Python installation.

NEW QUESTION # 155
A systems administrator needs to check the statuses of all the services on a Linux server. Which of the following commands accomplishes this task?

A. systemctl is-active --services
B. systemctl list-units --type=services
C. systemctl is-enabled --services
D. systemctl list-sockets --type=services

Answer: B

Explanation:
Service management using systemd is a core Linux+ V8 system management objective. Administrators frequently need to view the current status of all services to determine which ones are running, stopped, failed, or inactive.
The correct command is systemctl list-units --type=services, which displays all loaded service units along with their current state, including whether they are active, inactive, failed, or running. This provides a comprehensive, real-time view of service statuses on the system and is commonly used during troubleshooting and audits.
Option A, systemctl is-active, is designed to check the status of a single service, not all services. Option B lists socket units, not services. Option C, systemctl is-enabled, checks whether services are enabled at boot, not whether they are currently running.
Linux+ V8 documentation explicitly references systemctl list-units --type=service as the primary command for viewing service runtime states. Therefore, the correct answer is D.

NEW QUESTION # 156
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:
admin@192.168.10.50: Permission denied (publickey,password)
After seeing the message, the administrator attempts to connect using ssh -v admin@192.168.10.50 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?

A. Create a new key pair by running ssh-keygen -t ecdsa.
B. Set PermitRootLogin yes in the /etc/ssh/sshd_config file.
C. Update permissions on the /home/admin/.ssh directory to 700 on the remote server.
D. Issue systemctl restart sshd on the local server.

Answer: A

Explanation:
The "no mutual signature algorithm" error means the RSA/SHA-1 key type (ssh-rsa) isn't supported by both client and server. Generating a new key with a modern algorithm (e.g., ssh- keygen -t ecdsa) ensures a mutually supported signature method.

NEW QUESTION # 157
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