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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: System Management | 23% | - Installation, configuration, and maintenance
|
| Topic 2: Security | 18% | - Access control and authentication
|
| Topic 3: Services and User Management | 20% | - Service configuration and operation
|
| Topic 4: Troubleshooting | 22% | - Network and service problems
|
| Topic 5: Automation and Scripting | 17% | - Shell scripting and automation
|
>> Valid XK0-006 Exam Sample <<
PassCollection CompTIA Linux+ Certification Exam (XK0-006) practice test has real CompTIA Linux+ Certification Exam (XK0-006) exam questions. You can change the difficulty of these questions, which will help you determine what areas appertain to more study before taking your CompTIA XK0-006 Exam Dumps. Here we listed some of the most important benefits you can get from using our CompTIA XK0-006 practice questions.
NEW QUESTION # 178
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).
Answer: A,B
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 # 179
A systems administrator is having issues with a third-party API endpoint. The administrator receives the following output:
Which of the following actions should the administrator take to resolve the issue?
Answer: A
Explanation:
This scenario represents a name resolution failure, which is a common troubleshooting case addressed in CompTIA Linux+ V8. The critical clues are the error messages returned by both curl and dig.
The curl error "Could not resolve host" indicates that the system is unable to translate the hostname into an IP address. This is confirmed by the dig output, which returns NXDOMAIN, meaning the DNS resolver cannot resolve the requested domain name. Importantly, the dig output shows that the query is reaching a DNS server (10.255.255.254), but the resolution fails, strongly pointing to a DNS client configuration issue.
Option C, reviewing and fixing the DNS client configuration file (such as /etc/resolv.conf or systemd- resolved settings), is the correct action. Linux+ V8 documentation highlights DNS misconfiguration as a primary cause of application connectivity issues. Incorrect nameserver entries, unreachable DNS servers, or misconfigured resolvers commonly produce NXDOMAIN responses.
The other options are incorrect. Firewall issues would result in connection timeouts, not DNS resolution failures. Requesting a new API endpoint is unnecessary without first confirming local DNS functionality.
Internet connectivity issues would typically prevent any DNS communication, but here a DNS server is clearly being contacted.
Linux+ V8 stresses a layered troubleshooting approach: verify DNS resolution before investigating network ports or application logic. Therefore, the correct answer is C. Review and fix the DNS client configuration file.
NEW QUESTION # 180
A Linux system displays the following error during operation:
Kernel panic - not syncing: Fatal Machine check
Pid: 0, comm: swapper Tainted: G M
Call Trace:
...
mce_panic
do_machine_check
Which of the following is the most likely cause of this issue?
Answer: B
Explanation:
The correct answer is B. Hardware failure (CPU or memory) because the error message explicitly references a
"Machine Check Exception (MCE)", which is a hardware-level error detected by the CPU. The line "Kernel panic - not syncing: Fatal Machine check" indicates that the kernel encountered a critical, unrecoverable hardware condition and halted the system to prevent further damage or data corruption.
Machine Check Exceptions are generated by the CPU when it detects internal errors such as cache failures, bus errors, or memory corruption. These errors are typically associated with faulty hardware components like the processor, RAM, motherboard, or even overheating issues. The presence of functions like mce_panic and do_machine_check in the call trace further confirms that the kernel is responding to a hardware-level fault.
Option A (Filesystem corruption) is incorrect because filesystem issues usually generate I/O errors or mount failures, not machine check exceptions.
Option C (Misconfigured bootloader) is incorrect because bootloader problems typically prevent the system from starting properly, rather than causing runtime kernel panics with hardware-related traces.
Option D (Incorrect file permissions) is incorrect because permission issues affect user access and application behavior, not kernel-level operations.
From a Linux+ troubleshooting perspective, kernel panics related to machine checks require hardware diagnostics. Administrators should inspect system logs (/var/log/messages, dmesg), run memory tests (e.g., memtest86+), check CPU health, and verify system cooling. Hardware replacement or firmware updates may be necessary to resolve the issue.
NEW QUESTION # 181
System users are being randomly disconnected from a server. The systems administrator inspects the following output:
Which of the following should the administrator do to fix the issue?
Answer: D
Explanation:
The interface shows a very high number of RX and TX errors while the route and gateway are present and the MTU is standard. This points to a physical or hardware problem with the network interface, so replacing the NIC is the best corrective action.
NEW QUESTION # 182
A systems administrator is creating a now shared directory. Which of the following commands ensures all users from the same group will be able to work with the newly created files?
Answer: D
Explanation:
Setting the setgid bit on a shared directory causes newly created files and subdirectories to inherit the directory's group ownership, allowing members of the same group to collaborate consistently on new files.
NEW QUESTION # 183
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