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NEW QUESTION # 19
Which of the following commands is used to display detailed information about block devices on a Linux system?
Answer: A
Explanation:
The correct answer is A. lsblk because it is specifically designed to display detailed information about block devices such as hard drives, SSDs, partitions, and their mount points in a structured, hierarchical format. The lsblk (list block devices) command provides a clear overview of how storage devices are organized, including relationships between disks and their partitions.
When executed, lsblk shows important details such as device names (e.g., sda, sdb), sizes, types (disk or partition), and mount points. This makes it extremely useful for system administrators when managing storage, troubleshooting disk issues, or verifying newly attached devices.
NEW QUESTION # 20
A systems administrator wants to update and apply changes in an existing file in a remote Git repository.
Which of the following is the last Git command the administrator should execute to complete this process?
Answer: A
Explanation:
Git workflows are a core component of the Automation and Orchestration domain in CompTIA Linux+ V8.
When working with remote repositories, administrators follow a standard lifecycle to move changes from a local environment to the shared remote server.
The complete process typically involves:
* git pull: Retrieving and merging the latest changes from the remote to ensure the local copy is up to date.
* git add: Staging the modified files.
* git commit: Saving the changes to the local repository history with a descriptive message.
* git push: Transmitting the local commits to the remote repository.
In this scenario, the question asks for the last command required to complete the process of updating the remote repository. While git commit (Option A) saves the changes locally, those changes are not available to other team members or the remote server until they are pushed. Therefore, git push origin update-feature is the final step that synchronizes the local branch with the remote repository.
Option B (checkout -b) is used at the beginning of the process to create a new branch. Option C (pull) is also performed early to avoid conflicts.
The verified answer is git push, as it is the definitive concluding action in the Git synchronization workflow.
NEW QUESTION # 21
A systems administrator needs to report the IP addresses of the users currently connected to the server. Which of the following commands should the administrator use to find the required information?
Answer: C
Explanation:
This command displays information about currently logged-in users and includes the IP addresses they are connected from, making it suitable for reporting active user connections.
NEW QUESTION # 22
A systems administrator needs to enable routing of IP packets between network interfaces. Which of the following kernel parameters should the administrator change?
Answer: B
Explanation:
IP packet forwarding is a key networking function in Linux system management and is explicitly referenced in the Linux+ V8 objectives. Enabling this feature allows a Linux system to act as a router by forwarding packets between network interfaces.
The kernel parameter responsible for this behavior is net.ipv4.ip_forward. When this parameter is set to 1, the Linux kernel allows IPv4 packets to be forwarded between interfaces. By default, this setting is often disabled on non-routing systems for security reasons.
The parameter can be modified temporarily using the sysctl command or permanently by editing /etc/sysctl.
conf or files under /etc/sysctl.d/. Linux+ V8 documentation highlights this parameter as essential for configuring routing, NAT, and firewall-based gateway systems.
The other options are incorrect. net.ipv4.ip_multicast controls multicast behavior, not packet forwarding. net.
ipv4.ip_route is not a valid kernel parameter. net.ipv4.ip_local_port_range defines the range of ephemeral ports used by outgoing connections and has no effect on routing.
Properly enabling IP forwarding is critical when configuring VPN gateways, firewalls, and network appliances. Therefore, the correct answer is D. net.ipv4.ip_forward.
NEW QUESTION # 23
An administrator set up a new user account called "test". However, the user is unable to change their password. Given the following output:
Which of the following is the most likely cause of this issue?
Answer: D
Explanation:
For normal users to change their own password, /bin/passwd must have the SUID bit set (permissions should be -rwsr-xr-x). The SUID bit allows users to run the program with the permissions of the file owner (root), which is required to update /etc/shadow. The provided output shows /bin/passwd does not have the SUID bit (no 's' in the owner's execute field). As a result, user "test" receives an "Authentication token manipulation error". The password can be changed as root, which confirms it's a permissions/SUID issue.
NEW QUESTION # 24
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