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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam (XK0-006) |
| Exam Number: | XK0-006 |
| Real Exam Qty: | Maximum 90 |
| Exam Duration: | 90 minutes |
| Passing Score: | 720 (on a scale of 100–900) |
| Exam Format: | Performance-based questions (PBQs), Multiple-choice questions |
| Related Certifications: | CompTIA Security+ CompTIA Network+ CompTIA A+ |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Exam Price: | Approximately USD 358 (varies by region) |
| 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 12–24 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 # 199
The security manager at a company notifies a systems administrator of open vulnerabilities on the Linux system. The administrator receives the following information while logged in to the server:
$ date
Thu Jul 11 16:12:42 UTC 2024
$ getenforce
Enforcing
$ dnf history
ID | Command Line | Date and time | Action(s) | Altered
45 | update -y | 2023-07-09 | Update | 27
46 | install httpd | 2023-01-11 | Install | 9
47 | update -y | 2023-08-08 | Upgrade | 44
Which of the following is the most likely security concern?
Answer: B
Explanation:
Maintaining system security requires regular patching and updates to mitigate vulnerabilities. In this scenario, the administrator is presented with the current system date (July 11, 2024) and a history of package management transactions via the dnf history command. The last recorded update transaction (ID 47) occurred on August 8, 2023. This indicates that the system has gone nearly a full year without receiving security patches or software updates.
According to CompTIA Linux+ V8 security best practices, " unpatched systems " represent one of the most significant risks to an organization ' s infrastructure. New vulnerabilities (CVEs) are discovered constantly, and vendors release patches to address these flaws. A system that has not been updated in a year is likely susceptible to numerous exploits that have been patched in more recent software versions. Therefore, the primary security concern is the lack of recent updates.
The other options are not valid security concerns in this context. While httpd (Apache) may have vulnerabilities if unpatched, its mere presence (Option B) is not inherently a security concern if the service is required for business operations. Option C refers to the time zone configuration (UTC vs. EDT), which has no impact on system security. Option D suggests disabling SELinux; however, SELinux in " Enforcing " mode is actually a security best practice that provides Mandatory Access Control (MAC) to protect the system.
Disabling it would weaken the system ' s security posture rather than improve it.
The verified answer is that the server requires immediate patching due to the elapsed time since its last update.
NEW QUESTION # 200
A Linux administrator attempts to unmount the local filesystem /datain 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 fuser command identifies and terminates processes that are actively using the /data filesystem, allowing it to be safely unmounted once those processes are stopped.
NEW QUESTION # 201
A systems administrator is working on configuration changes and needs to replace a hostname in a specific file. Which of the following commands should the administrator use to complete this task?
Answer: D
Explanation:
The correct answer is B. sed -i ' s/oldhostname/newhostname/ ' /etc/configuration.file because the sed (stream editor) command is specifically designed for searching, finding, and replacing text within files, which is exactly the requirement in this scenario. The -i option enables in-place editing, meaning the file is modified directly without needing to create a separate output file.
The substitution expression ' s/oldhostname/newhostname/ ' follows the standard sed syntax, where s stands for substitute. It replaces the first occurrence of oldhostname with newhostname on each line. This is a common and efficient method used by Linux administrators when performing configuration updates across files.
Option A is incorrect because cut is used for extracting sections of text, not replacing content, and piping into vi in this way is not valid for automated editing. Option C is incorrect because it filters lines containing oldhostname and redirects them to a file named newhostname, which does not perform any replacement and also overwrites data. Option D is incorrect because while awk can process text, the syntax shown does not correctly replace text within the file and does not write changes back to the original file.
In Linux+ objectives, mastering tools like sed is essential for automation and scripting tasks. Administrators frequently need to update configuration files programmatically, especially across multiple systems. Using sed ensures accuracy, efficiency, and scalability when performing such repetitive text modifications.
NEW QUESTION # 202
On a Kubernetes cluster, which of the following resources should be created in order to expose a port so it is publicly accessible on the internet?
Answer: A
Explanation:
Container orchestration concepts are part of the Automation and Orchestration domain in Linux+ V8. In Kubernetes, workloads run inside Pods, but Pods are not directly accessible from outside the cluster.
To expose an application externally, a Service resource must be created. Services provide a stable network endpoint and can be configured as NodePort, LoadBalancer, or ClusterIP. Public exposure is typically achieved using NodePort or LoadBalancer types.
Option C, Service, is correct. Deployments manage Pods, but they do not handle networking exposure. Pods represent running containers but lack external accessibility by default. "Network" is not a valid Kubernetes resource type.
Linux+ V8 documentation highlights Services as the mechanism for exposing containerized applications. Therefore, the correct answer is C.
NEW QUESTION # 203
A Linux administrator needs to create accounts for a list of new users. The user account names have been defined in the USER_LIST variable as follows:
USER_LIST= " alice bob charles "
Which of the following commands should the administrator use to successfully create the user accounts?
Answer: C
Explanation:
Automating user creation is a frequent administrative task. In shell scripting, when you have a space- separated list of items stored in a variable, the for loop is the most efficient way to iterate through them.
According to CompTIA Linux+ V8, the syntax for < variable > in < list > ; do < commands > ; done allows the shell to split the list by whitespace and assign each item to the variable sequentially.
In the command for username in $USER_LIST; do useradd -m " $username " ; done:
* The shell expands $USER_LIST into alice, bob, and charles.
* In the first iteration, username is set to alice, and useradd -m " alice " is executed.
* The process repeats for bob and then charles.
* The -m flag ensures a home directory is created for each user, which is a best practice.
The other options are syntactically incorrect or unsuitable. Options A and B attempt to use while and until with echo, but they lack the read command required to actually assign the piped input to the username variable (e.g., while read username). Option C (select) is used for creating interactive menus for users to choose from, not for automated batch processing.
Therefore, the for loop is the verified and standard method for this task in a Linux environment.
NEW QUESTION # 204
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