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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam (XK0-006) |
| Exam Number: | XK0-006 |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Exam Price: | Approximately USD 358 (varies by region) |
| Exam Format: | Performance-based questions (PBQs), Multiple-choice questions |
| Related Certifications: | CompTIA A+ CompTIA Network+ CompTIA Security+ |
| Real Exam Qty: | Maximum 90 |
| Exam Duration: | 90 minutes |
| Passing Score: | 720 (on a scale of 100โ900) |
| 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 # 153
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: B,E
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 # 154
A Linux administrator attempts to unmount the local filesystem /data in order to mount a new volume.
However, the administrator receives the following error message:
umount: /data: target is busy
Which of the following commands should the administrator run to resolve the issue?
Answer: C
Explanation:
The correct answer is D. fuser -mk /data because it directly addresses the issue of a "busy" mount point by identifying and terminating processes that are currently using the filesystem. The error "target is busy" occurs when one or more processes are actively accessing files or directories within the mounted filesystem, preventing it from being safely unmounted.
The fuser command is specifically designed to identify processes that are using files, directories, or sockets.
When used with the -m option, it checks all processes accessing the specified mount point. The -k option sends a signal (by default SIGKILL) to terminate those processes. This frees the filesystem, allowing the administrator to successfully run the umount command afterward.
Option A (tree -g /data) is incorrect because it only displays the directory structure and permissions; it does not identify or stop processes using the filesystem.
Option B (ls -ld /data) is incorrect because it shows directory metadata such as permissions and ownership, not active usage.
Option C (stat -f /data) is incorrect because it provides filesystem statistics but does not help identify or resolve active process locks.
From a Linux+ troubleshooting perspective, tools like fuser and lsof are essential for diagnosing resource contention issues. Properly resolving "busy" mount points ensures data integrity and prevents corruption when unmounting filesystems, making this a critical administrative skill.
NEW QUESTION # 155
Which of the following is a reason multiple password changes on the same day are not allowed?
Answer: D
Explanation:
Restricting multiple password changes in one day prevents users from cycling through password changes just to reuse an old password, thereby enforcing stronger security practices.
NEW QUESTION # 156
A Linux user needs to download the latest Debian image from a Docker repository. Which of the following commands makes this task possible?
Answer: C
Explanation:
The correct answer is B. docker image pull debian because it is the standard Docker command used to download container images from a remote repository such as Docker Hub. In Docker terminology, "pulling" an image means retrieving it from a remote registry and storing it locally so it can be used to create containers.
When a user executes docker image pull debian, Docker connects to the default registry (Docker Hub), searches for the official Debian image, and downloads the latest version (by default, the "latest" tag unless otherwise specified). This command is essential in container-based workflows and is commonly used in automation, orchestration, and DevOps environments.
Option A (docker image init debian) is incorrect because there is no valid Docker command called init under docker image. Initialization of containers is handled differently, typically via docker run.
Option C (docker image import debian) is incorrect because import is used to create a Docker image from a local tarball or file, not to download from a remote repository.
Option D (docker image save debian) is incorrect because save is used to export an existing local image into a tar archive for backup or transfer purposes. It does not download images.
From a Linux+ perspective, understanding container management is a key part of automation and orchestration. Commands like docker pull allow administrators to quickly provision environments, deploy applications, and maintain consistency across systems. This makes it a fundamental skill for modern Linux system administration and DevOps practices
NEW QUESTION # 157
A systems administrator is troubleshooting a network error on a Linux server. Given the following:
Which of the following is the reason for the error?
Answer: C
Explanation:
The system cannot resolve the hostname because no DNS servers are configured, as indicated by the absence of nameserver entries in the resolver configuration file, even though network connectivity and routing are present.
NEW QUESTION # 158
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