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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 22% | - System and hardware issues
|
| System Management | 23% | - Installation, configuration, and maintenance
|
| Services and User Management | 20% | - Service configuration and operation
|
| Automation and Scripting | 17% | - Shell scripting and automation
|
| Security | 18% | - System hardening and compliance
|
>> XK0-006 Valid Test Sample <<
This XK0-006 exam prep material has been prepared under the expert surveillance of 90,000 highly experienced IT professionals worldwide. This updated and highly reliable Actual4Labs product consists of 3 prep formats: CompTIA Linux+ Certification Exam (XK0-006) dumps PDF, desktop practice exam software, and browser-based mock exam. Each format specializes in a specific study style and offers unique benefits, each of which is crucial to good CompTIA Linux+ Certification Exam (XK0-006) exam preparation. The specs of each CompTIA XK0-006 exam questions format are listed below, you may select any of them as per your requirements.
NEW QUESTION # 187
Which of the following commands is used to ensure a service starts automatically at boot on a system using systemd?
Answer: D
Explanation:
The correct answer is B. systemctl enable httpd because it configures a service to start automatically during system boot in systems that use systemd as the init system. The enable command creates the necessary symbolic links between the service unit file and the appropriate target (such as multi- user.target), ensuring the service is launched when the system starts.
NEW QUESTION # 188
A systems administrator is helping to secure a new web application. During the tests, the administrator obtains the following output to validate the application:
SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
ALPN, server accepted to use http/1.1
Server certificate:
subject: CN=*.newapp.comptia.org
start date: Jan 17 00:00:00 2024 GMT
expire date: Feb 16 23:59:59 2034 GMT
issuer: C=US; O=Comptia; OU=IT Security; CN=ca1.comptia.org
SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway.
Which of the following explains the validation results?
Answer: C
Explanation:
The correct answer is A. The certificate was not signed by a trusted authority, which was forcefully ignored during the tests. The key indicator in the output is the message: "SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway." This error means that the client system cannot validate the certificate chain because it does not recognize or trust the certificate authority (CA) that issued the server certificate.
In TLS/SSL validation, the client must verify that the server's certificate chains up to a trusted root CA present in the local trust store. If the issuer (in this case, ca1.comptia.org) is not included in the client's trusted certificate authorities, the verification fails. However, the phrase "continuing anyway" indicates that the validation failure was bypassed-likely due to a testing flag such as -k or --insecure in curl-allowing the connection despite the trust issue.
Option B is incorrect because the certificate validity dates show it is valid from 2024 to 2034, not expired.
Option C is incorrect because wildcard certificates (e.g., *.newapp.comptia.org) are commonly used and not inherently insecure when properly managed.
Option D is incorrect because the cipher suite shown (ECDHE-RSA-AES256-GCM-SHA384) is considered strong and modern, not outdated.
From a Linux+ security perspective, proper certificate validation is critical. Administrators should ensure that the issuing CA is trusted by installing the correct CA certificates rather than bypassing validation, which exposes systems to man-in-the-middle attacks and other security risks.
NEW QUESTION # 189
Which of the following best describes the role of initrd?
Answer: B
Explanation:
initrd (initial ramdisk) provides essential kernel modules and drivers (e.g., for storage and filesystems) needed during the early boot process before the root filesystem is mounted.
NEW QUESTION # 190
In the echo "profile-$num-$name" line of a shell script, the variable $num seems to not be expanding during execution. Which of the following notations ensures the value is expanded?
Answer: A
Explanation:
Shell variable expansion is a fundamental scripting concept included in Linux+ V8 objectives. In Bash and similar shells, variables are expanded only when they are interpreted within double quotes or unquoted contexts, and sometimes explicit syntax is required to avoid ambiguity.
The correct notation is ${num}, as shown in option D. Using curly braces around the variable name ensures the shell correctly identifies the variable boundary, especially when it is adjacent to other characters. This guarantees proper expansion of the variable's value.
The other options are incorrect. Single quotes prevent variable expansion entirely. The $(...) syntax is used for command substitution, not variable expansion. Quoting the variable name itself also prevents expansion.
Linux+ V8 documentation emphasizes ${VAR} notation as a best practice in shell scripting for clarity and correctness. Therefore, the correct answer is D.
NEW QUESTION # 191
A systems administrator needs to restore a backup to the /usr/app/data directory. Which of the following commands should the administrator use for this task?
Answer: A
Explanation:
The tar (tape archive) utility is the standard tool for archiving and compressing files in Linux. According to CompTIA Linux+ V8 objectives, administrators must be proficient in extracting data into specific target locations. The command tar -xvzf /tmp/backup.tar.gz -C /usr/app/data is the correct syntax for this operation.
The flags used in the command provide the following functionality:
* -x: Instructs tar to extract the contents of the archive.
* -v: Enables verbose output, showing the files as they are being extracted.
* -z: Tells tar to filter the archive through gzip for decompression (required for .tar.gz files).
* -f: Specifies the filename of the archive to be processed (/tmp/backup.tar.gz).
* -C: Changes the directory to the specified path (/usr/app/data) before performing the extraction.
Using the -C flag is the most efficient and recommended way to restore a backup to a directory other than the current working directory. Without this flag, tar would extract the files into the current directory, which might not be the intended destination and could clutter the filesystem.
The other options are incorrect. Option B lacks the -z flag for decompression and incorrectly places the destination path after the archive filename without the -C flag, which tar would interpret as a request to extract only a specific file named /usr/app/data from inside the archive. Option C has the argument order reversed. Option D attempts to use shell redirection ( > ), which is used for text output and is not compatible with the tar extraction process for writing files to a directory.
Therefore, Option A is the verified correct command for restoring a compressed backup to a specific directory.
NEW QUESTION # 192
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