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NEW QUESTION # 163
An administrator added a new disk to expand the current storage. Which of the following commands should the administrator run first to add the new disk to the LVM?
Answer: A
Explanation:
To add a new physical disk to LVM, the disk must first be initialized as a physical volume using the pvcreate command. This prepares the new disk for use by the LVM subsystem. After initializing with pvcreate, you would use vgextend to add the new physical volume to an existing volume group.
NEW QUESTION # 164
A Linux administrator needs to add a new HTTP service on the server. Which of the following commands allows other systems to communicate with the service after the system is restarted?
Answer: C
Explanation:
The correct answer is C. firewall-cmd --add-service=http --permanent because it ensures that the firewall rule allowing HTTP traffic remains in effect even after a system reboot. In Linux systems using firewalld, rules can be applied in two modes: runtime and permanent.
By default, when a rule is added using firewall-cmd --add-service=http (Option D), it is applied only to the runtime configuration. This means the rule will allow HTTP traffic immediately, but it will be lost once the system is restarted or the firewall service is reloaded.
The --permanent flag ensures that the rule is written to the persistent configuration files, so it survives reboots.
After adding a permanent rule, administrators typically run firewall-cmd --reload to apply the changes to the runtime environment as well.
Option A is incorrect because while it reloads the firewall, it does not specify the rule as permanent, so the configuration will not persist after reboot.
Option B is incorrect because --add-port=http is not valid syntax (ports must be specified numerically, e.g., 80
/tcp), and --complete-reload is not appropriate here.
Option D is incorrect because it only applies the rule temporarily (runtime only).
From a Linux+ security perspective, managing firewall rules persistently is essential for maintaining secure and consistent network access. Using the --permanent option ensures services like HTTP remain accessible across system restarts while still being controlled by firewall policies.
NEW QUESTION # 165
Which of the following Ansible components contains a list of hosts and host groups?
Answer: C
Explanation:
Ansible architecture and core components are part of the Automation, Orchestration, and Scripting domain in CompTIA Linux+ V8. Among these components, the inventory plays a foundational role in defining the infrastructure Ansible manages.
An Ansible inventory is a file (or set of files) that contains a list of managed hosts and optionally organizes them into logical groups. These hosts can be defined by IP address, fully qualified domain name (FQDN), or hostname. Inventories may be written in INI, YAML, or dynamically generated formats. Grouping hosts allows administrators to apply configurations, roles, and tasks to multiple systems simultaneously.
Option B, Inventory, is correct because it explicitly defines which systems Ansible will target. Without an inventory, Ansible does not know where to execute tasks. Linux+ V8 documentation emphasizes inventories as the starting point for all Ansible operations.
The other options are incorrect. Facts are system variables automatically collected by Ansible about managed hosts, such as OS version or IP address. Playbooks define what actions to perform but rely on the inventory to know where to perform them. Collections are distribution units that package roles, modules, and plugins, not host definitions.
Therefore, the correct answer is B. Inventory.
NEW QUESTION # 166
A small group of remote users needs permission to run some administrative commands on a Linux server. Which of the following approaches is the best way to address this request?
Answer: A
Explanation:
The best approach is to follow least privilege by identifying the specific administrative commands the users need and creating sudo rules that allow only those commands with elevated privileges.
NEW QUESTION # 167
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 # 168
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