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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 |
| Certificate Validity Period: | 3 years |
| Passing Score: | 720 (on a scale of 100โ900) |
| Related Certifications: | CompTIA Security+ CompTIA A+ CompTIA Network+ |
| Exam Price: | Approximately USD 358 (varies by region) |
| Available Languages: | English |
| Real Exam Qty: | Maximum 90 |
| Exam Duration: | 90 minutes |
| Recommended Training: | CompTIA Official Training Resources CompTIA CertMaster Learn (Linux+ XK0-006) |
| 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 # 16
An administrator needs to remove the directory /home/user1/data and all of its contents. Which of the following commands should the administrator use?
Answer: D
Explanation:
File and directory management is a core system administration skill addressed in Linux+ V8. When an administrator needs to delete a directory that contains files or subdirectories, a recursive deletion is required.
The correct command is rm -r /home/user1/data. The rm command removes files, and the -r (recursive) option allows it to delete directories and all of their contents, including nested files and subdirectories. This is the standard and correct method for removing non-empty directories.
The other options are incorrect. rmdir -p only removes empty directories and will fail if the directory contains files. ln -d is used to create directory hard links, not remove directories. cut -d is a text-processing command unrelated to filesystem operations.
Linux+ V8 documentation stresses caution when using rm -r, as it permanently deletes data without recovery unless backups exist. Therefore, the correct answer is C.
NEW QUESTION # 17
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?
Answer: A
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 # 18
Which of the following commands should an administrator use to see a full hardware inventory of a Linux system?
Answer: B
Explanation:
Hardware inventory and system information gathering are core responsibilities in Linux system management and are explicitly covered in CompTIA Linux+ V8 objectives. Among the listed commands, dmidecode is the most comprehensive tool for retrieving detailed hardware inventory information.
The dmidecode command reads data directly from the system's DMI (Desktop Management Interface) / SMBIOS tables, which are provided by the system firmware (BIOS or UEFI). It reports detailed information about system hardware components, including motherboard details, BIOS version, system manufacturer, CPU sockets, memory slots, installed RAM modules, serial numbers, and asset tags. This makes it the preferred tool when a full hardware inventory is required.
The other options provide only partial or specific information. lsmod lists currently loaded kernel modules and does not provide physical hardware inventory. dmesg displays kernel ring buffer messages, which may include hardware detection logs but are not structured or complete inventory data. lscpu reports CPU architecture and processor details only, not the entire system hardware.
Linux+ V8 documentation highlights dmidecode as the authoritative utility for system hardware discovery and inventory auditing. It is commonly used in enterprise environments for documentation, troubleshooting, capacity planning, and compliance reporting.
Because it provides the most complete and authoritative hardware information available from the system firmware, the correct answer is A. dmidecode.
NEW QUESTION # 19
A systems administrator is patching servers that are vulnerable to the regreSSHion bug. Which of the following commands allows the administrator to patch the servers?
Answer: C
Explanation:
Using the advisory option with the upgrade command applies security patches associated with a specific vulnerability advisory, ensuring the OpenSSH package is updated to remediate the regreSSHion flaw.
NEW QUESTION # 20
Users report that a Linux system is unresponsive and simple commands take too long to complete. The Linux administrator logs in to the system and sees the following: Output 1:
10:06:29 up 235 day, 19:23, 2 users, load average: 8.71, 8.24, 7.71
Which of the following is the system experiencing?
Answer: B
Explanation:
This scenario is a classic performance troubleshooting case covered under the Troubleshooting domain of the CompTIA Linux+ V8 objectives. The key indicators to analyze are the load average values and the CPU utilization statistics.
The uptime command shows load averages of 8.71, 8.24, and 7.71 over the 1-, 5-, and 15-minute intervals.
Load average represents the average number of processes that are either running on the CPU or waiting to run. On a system with 4 CPU cores, a healthy load average would typically be close to or below 4. Load averages consistently near or above 8 indicate that there are significantly more runnable processes than available CPU resources, causing processes to wait and resulting in poor system responsiveness.
The CPU output further confirms this condition. The %idle value is 0, meaning the CPU has no idle time available. The majority of CPU time is spent in user space (65.88%) and system/kernel space (20.54%), indicating heavy computational and kernel activity. While %iowait is present at 5.65%, it is not high enough to suggest that disk I/O is the primary bottleneck.
Option C, high CPU load, best explains the symptoms. High CPU load causes commands to execute slowly because processes are competing for limited CPU time. This directly matches the observed behavior of the system being unresponsive.
The other options are incorrect. High uptime simply indicates how long the system has been running and does not cause performance issues by itself. High latency is a general term and not a specific diagnosis shown by the metrics provided. High I/O wait times would require a significantly higher %iowait value.
According to Linux+ V8 documentation, correlating load averages with CPU core count and utilization is essential for accurate performance diagnosis. Therefore, the correct answer is C. High CPU load.
NEW QUESTION # 21
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