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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Scripting, Containers, and Automation | 19% | - Automate administration with Python and configuration management tools - Manage orchestration processes - Deploy and manage containers (Docker/Podman) - Manage version control using Git - Write and execute BASH shell scripts - Implement automation workflows |
| Topic 2: Troubleshooting | 28% | - Troubleshoot user issues - Troubleshoot security issues (SELinux, permissions) - Troubleshoot system properties and processes - Monitor system logs, health, and events - Troubleshoot network connectivity (firewall, routing, DNS) - Troubleshoot application issues - Optimize performance (CPU, memory, I/O) - Troubleshoot hardware issues |
| Topic 3: Security | 21% | - Implement security hardening - Manage firewalls - Apply best practices for permissions and authentication - Manage file security and access controls - Configure SELinux and security contexts - Perform vulnerability assessments |
| Topic 4: System Management | 32% | - Configure kernel modules and network parameters - Manage storage - Perform basic Linux tasks - Manage users and groups - Manage permissions and ownership - Manage packages and software - Manage system components - Manage files and directories - Manage the Linux boot process - Manage kernel modules - Manage devices - Manage networking - Configure storage and cloud/virtualization technologies |
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NEW QUESTION # 48
Which of the following commands sets all the directories ' permissions recursively in the user ' s home directory and makes them accessible only to the user?
Answer: D
Explanation:
The correct answer is B. find ~ -type d -exec chmod 700 {} ; because it recursively targets all directories within the current user's home directory and sets their permissions to 700, which restricts access exclusively to the owner.
In Linux permission notation, 700 means:
Owner: read (r), write (w), execute (x)
Group: no permissions
Others: no permissions
This ensures that only the user can access, modify, and traverse the directories, which is a common security requirement for protecting personal or sensitive data. The find ~ -type d portion ensures that only directories (not files) within the user's home directory are selected. The -exec chmod 700 {} ; part applies the permission change to each directory found.
Option A is incorrect because it applies permissions 777 (full access to everyone) and targets files across the entire filesystem, which is a major security risk.
Option C is incorrect because it sets permissions to 750, which still allows group access. Additionally, it targets all directories under /home, not just the current user's home directory.
Option D is incorrect because 755 allows read and execute permissions to group and others, meaning directories are not restricted to the user only.
From a Linux+ security perspective, properly managing file and directory permissions is critical to maintaining system confidentiality and integrity. Using chmod 700 ensures strict access control, and combining it with find allows administrators to efficiently enforce secure permissions across directory structures.
NEW QUESTION # 49
A Linux systems administrator needs to extract the contents of a file named /home/dev/web.bkp to the /var
/www/html/ directory. Which of the following commands should the administrator use?
Answer: C
Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From Linux+ V8 documents:
File extraction and backup restoration are fundamental System Management tasks covered in CompTIA Linux+ V8. In this scenario, the administrator must extract the contents of an existing backup file into a target directory.
The correct command is option B, which uses cpio in extract mode. The command changes into the destination directory (/var/www/html/) using pushd, extracts the archive contents with cpio -idv, and then returns to the original directory with popd. This ensures that files are restored into the correct location without modifying paths inside the archive.
The cpio utility is commonly used for backups created with cpio -o and supports reading archive data from standard input. Linux+ V8 documentation includes cpio as a valid and supported archive format for backup and restore operations.
The other options are incorrect. Option A incorrectly assumes the backup is a gzip-compressed tar archive.
Option C creates a new archive instead of extracting one. Option D assumes the file is a ZIP archive, which is not indicated by the .bkp extension.
Linux+ V8 emphasizes using the correct tool based on the archive format and restoring files into the intended directory. Therefore, the correct answer is B.
NEW QUESTION # 50
A systems administrator needs to enable routing of IP packets between network interfaces.
Which of the following kernel parameters should the administrator change?
Answer: A
Explanation:
The net.ipv4.ip_forward kernel parameter controls whether the Linux kernel can forward IP packets between network interfaces, enabling routing functionality when set to 1.
NEW QUESTION # 51
Which of the following is the main reason for setting up password expiry policies?
Answer: C
Explanation:
Password management is a core topic in the Security domain of CompTIA Linux+ V8. Password expiry policies are implemented to reduce the risk associated with long-lived credentials.
The primary reason for enforcing password expiration is to mitigate the risk of exposed or compromised passwords. If a password is leaked through phishing, malware, keylogging, or data breaches, limiting its lifespan reduces the window of opportunity for attackers to exploit it. Requiring periodic password changes ensures that compromised credentials eventually become invalid.
Option B correctly captures this security objective. Linux+ V8 documentation emphasizes minimizing credential exposure as a key principle of access control.
The other options are secondary or incorrect. Avoiding password reuse and increasing complexity are addressed through password history and complexity policies, not expiration alone. Password expiry does not force passwordless authentication, making option C incorrect.
Therefore, the correct answer is B. To mitigate the use of exposed passwords.
NEW QUESTION # 52
The development team asks a Linux administrator to help diagnose a connectivity issue that is occurring with a newly developed software. The Linux administrator reviews the following output:
$ wget -vvv https://api.newapp.comptia.org/v2/health
Resolving proxy.comptia.org (proxy.comptia.org)... connected.
ERROR: The certificate of ' api.newapp.comptia.org ' is not trusted.
ERROR: The certificate of ' api.newapp.comptia.org ' does not have a known issuer.
Which of the following actions is the best way to resolve the issue?
Answer: B
Explanation:
The correct answer is A. Verify the remote certificate is trustworthy, and add it to the local trusted certificates repository because the error clearly indicates that the system does not recognize the certificate authority (CA) that issued the server's SSL/TLS certificate. This is a trust issue, not necessarily a problem with the certificate itself.
When wget reports that the certificate "is not trusted" and "does not have a known issuer," it typically means the CA certificate is missing from the local trust store. The proper and secure resolution is to first validate that the remote certificate is legitimate (for example, confirming it with the issuing authority or organization).
Once verified, the administrator should add the CA certificate to the system's trusted certificate store (e.g., /etc
/pki/ca-trust/ or /usr/local/share/ca-certificates/ depending on the distribution) and update the trust database.
Option B is incorrect because using a self-signed certificate introduces additional trust issues and is not appropriate for production environments unless properly managed.
Option C is incorrect because the error message does not indicate that the certificate is expired, only that the issuer is unknown.
Option D is incorrect because using --no-check-certificate bypasses SSL verification entirely, which creates a significant security vulnerability and violates best practices.
From a Linux+ security perspective, maintaining proper certificate validation is essential for secure communications. Administrators must ensure that trusted CAs are properly configured rather than bypassing verification mechanisms.
NEW QUESTION # 53
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