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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 28% | - Monitor system logs, health, and events - Troubleshoot security issues (SELinux, permissions) - Troubleshoot network connectivity (firewall, routing, DNS) - Troubleshoot system properties and processes - Troubleshoot user issues - Optimize performance (CPU, memory, I/O) - Troubleshoot hardware issues - Troubleshoot application issues |
| System Management | 32% | - Manage devices - Manage files and directories - Manage the Linux boot process - Manage users and groups - Manage kernel modules - Perform basic Linux tasks - Manage permissions and ownership - Configure storage and cloud/virtualization technologies - Manage system components - Configure kernel modules and network parameters - Manage packages and software - Manage networking - Manage storage |
| Scripting, Containers, and Automation | 19% | - Write and execute BASH shell scripts - Deploy and manage containers (Docker/Podman) - Manage orchestration processes - Manage version control using Git - Implement automation workflows - Automate administration with Python and configuration management tools |
| Security | 21% | - Manage file security and access controls - Apply best practices for permissions and authentication - Implement security hardening - Configure SELinux and security contexts - Perform vulnerability assessments - Manage firewalls |
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NEW QUESTION # 46
A Linux engineer needs to record new changes completed on a Git repository. Which of the following commands should the engineer use?
Answer: D
Explanation:
This command records the staged changes in the local repository by creating a new commit, preserving a snapshot of the work and its history.
NEW QUESTION # 47
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: A
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 # 48
A systems administrator is decommissioning a service. Which of the following commands should the administrator use to make sure users cannot start the service again?
Answer: D
Explanation:
This command prevents the service from being started manually or automatically by linking it to a null target, ensuring it cannot be restarted even if another service or user attempts to start it.
NEW QUESTION # 49
Which of the following cryptographic functions ensures a hard drive is encrypted when not in use?
Answer: B
Explanation:
LUKS (Linux Unified Key Setup) provides full-disk encryption, ensuring that the data on a hard drive is protected and unreadable when the system is powered off or the drive is not in use.
NEW QUESTION # 50
A systems administrator is developing a script to copy a file if it exists and return an error if it does not. Given the following incomplete script:
Which of the following statements is missing from the script?
Answer: B
Explanation:
An else statement is required to handle the condition when the file does not exist so the script can return the error message instead of attempting the copy operation.
NEW QUESTION # 51
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