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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam (XK0-006) |
| Exam Number: | XK0-006 |
| Exam Format: | Performance-based questions (PBQs), Multiple-choice questions |
| Exam Price: | Approximately USD 358 (varies by region) |
| Passing Score: | 720 (on a scale of 100โ900) |
| Exam Duration: | 90 minutes |
| Related Certifications: | CompTIA A+ CompTIA Security+ CompTIA Network+ |
| Real Exam Qty: | Maximum 90 |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Recommended Training: | CompTIA CertMaster Learn (Linux+ XK0-006) CompTIA Official Training Resources |
| Exam Registration: | Pearson VUE Exam Registration CompTIA Linux+ Official Certification Page |
| Sample Questions: | CompTIA XK0-006 Sample Questions |
| Exam Way: | Online (proctored) or onsite testing via Pearson VUE centers |
| Pre Condition: | No mandatory prerequisites, but 12โ24 months of Linux administration experience or CompTIA A+ / Network+ knowledge is recommended. |
| Official Syllabus URL: | https://www.comptia.org/certifications/linux |
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NEW QUESTION # 47
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?
Answer: C
Explanation:
The log shows avc: denied { read } caused by SELinux when sshd tries to access authorized_keys. The file has the wrong SELinux context (unconfined_u:object_r:home_root_t) instead of the expected context for SSH. This mismatch blocks SSH key authentication even though file permissions are correct. Adjusting the SELinux context (e.g., with restorecon) resolves the issue.
NEW QUESTION # 48
A Linux user runs the following command:
nohup ping comptia.com &
Which of the following commands should the user execute to attach the process to the current terminal?
Answer: C
Explanation:
The fg command brings a background job to the foreground, attaching it to the current terminal.
Since the ping process was started in the background with &, fg is the correct way to reattach it.
NEW QUESTION # 49
A systems administrator needs to open the DNS TCP port on a Linux system from network
10.0.0.0/24. Which of the following commands should the administrator use for this task?
Answer: B
Explanation:
The ufw allow 53/tcp from 10.0.0.0/24 command explicitly opens TCP port 53 (DNS) for connections coming from the 10.0.0.0/24 network, which is the correct way to configure this firewall rule.
NEW QUESTION # 50
(Partial question reconstructed from visible content)
Answer: C
Explanation:
The correct answer is C. pam.conf because it is directly associated with Pluggable Authentication Modules (PAM), which provide a flexible framework for authentication in Linux systems. PAM allows administrators to configure authentication policies independently from applications, enabling centralized control over login mechanisms, password policies, and account restrictions.
The /etc/pam.conf file (or more commonly the /etc/pam.d/ directory in modern systems) defines how authentication is handled for various services such as login, SSH, sudo, and others. Each PAM configuration specifies modules that perform authentication, account validation, password management, and session handling. This modular approach enhances security and flexibility, allowing administrators to enforce consistent authentication rules across multiple services.
Option D (smb.conf) is incorrect because it is the configuration file for Samba, which is used for file sharing and interoperability between Linux and Windows systems. It does not control system authentication policies at the OS level.
From a Linux+ security perspective, understanding PAM is critical because it governs how users authenticate and how access is controlled. Misconfiguration of PAM files can lead to authentication failures or security vulnerabilities. Therefore, administrators must carefully manage PAM configurations to ensure secure and reliable access control across the system.
If you upload the full top part, I can 100% confirm the exact original wording-but based on Linux+ standards, C is definitively correct.
NEW QUESTION # 51
Which of the following commands would a Linux administrator use to determine the temperature of a motherboard?
Answer: C
Explanation:
The correct answer is D. lm_sensors because it is the standard Linux utility used to monitor hardware sensor data, including motherboard temperature, CPU temperature, fan speeds, and voltage levels. The lm_sensors package provides tools such as the sensors command, which reads data from hardware monitoring chips embedded on the motherboard and displays real-time environmental and thermal information.
In Linux system management, monitoring hardware health is critical for maintaining system stability and preventing overheating issues. After installing and configuring lm_sensors (typically using the sensors-detect command), administrators can run sensors to view temperature readings for various components, including the motherboard chipset.
Option A (ipmitool) is partially related but incorrect in this context. While ipmitool can retrieve hardware monitoring data (including temperature) via IPMI interfaces, it requires compatible server hardware with IPMI support. It is not universally applicable across all Linux systems and is more specialized for enterprise server environments.
Option B (dmidecode) is incorrect because it retrieves hardware information from the system BIOS/firmware, such as manufacturer details, serial numbers, and hardware specifications. It does not provide real-time sensor data like temperature readings.
Option C (lspci) is also incorrect because it lists PCI devices and provides information about connected hardware components, but it does not include environmental or thermal data.
From a Linux+ perspective, lm_sensors is the most appropriate and commonly used tool for monitoring system temperatures and other hardware metrics, making it essential for proactive system management and troubleshooting.
NEW QUESTION # 52
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