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| Section | Weight | Objectives |
|---|---|---|
| Scripting, Containers, and Automation | 19% | - Automate administration with Python and configuration management tools - Manage orchestration processes - Implement automation workflows - Write and execute BASH shell scripts - Deploy and manage containers (Docker/Podman) - Manage version control using Git |
| Security | 21% | - Manage firewalls - Apply best practices for permissions and authentication - Perform vulnerability assessments - Implement security hardening - Configure SELinux and security contexts - Manage file security and access controls |
| System Management | 32% | - Configure storage and cloud/virtualization technologies - Perform basic Linux tasks - Manage packages and software - Manage files and directories - Manage networking - Manage system components - Manage kernel modules - Manage permissions and ownership - Manage devices - Manage users and groups - Manage storage - Configure kernel modules and network parameters - Manage the Linux boot process |
| Troubleshooting | 28% | - Troubleshoot hardware issues - Optimize performance (CPU, memory, I/O) - Troubleshoot security issues (SELinux, permissions) - Troubleshoot network connectivity (firewall, routing, DNS) - Troubleshoot application issues - Monitor system logs, health, and events - Troubleshoot system properties and processes - Troubleshoot user issues |
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NEW QUESTION # 126
A Linux administrator needs to analyze a compromised disk for traces of malware. To complete the analysis, the administrator wants to make an exact, block-level copy of the disk. Which of the following commands accomplishes this task?
Answer: C
Explanation:
The dd command performs a low-level, block-by-block copy of a device. Using if=/dev/sdc (input file) and of=/tmp/image (output file) with a block size (bs) ensures an exact replica of the disk, suitable for forensic analysis.
NEW QUESTION # 127
Users cannot access a server after it has been restarted. At the server console, the administrator runs the following commands;
Which of the following is the cause of the issue?
Answer: A
Explanation:
This issue is a classic example of post-reboot connectivity troubleshooting, which falls under the Troubleshooting domain of CompTIA Linux+ V8. The administrator has correctly gathered evidence using multiple diagnostic tools, allowing the root cause to be identified through correlation.
The ss -lnt output confirms that the SSH daemon is running and listening on TCP port 22. This eliminates the possibility that the SSH service failed to start after reboot. Additionally, the uptime output shows a very low load average, indicating that system performance is not a limiting factor. The successful ping test confirms that the server is reachable at the network layer and that DNS resolution and basic connectivity are functioning correctly.
The critical clue comes from the firewall configuration. The output of firewall-cmd --list-all shows that only specific services are allowed through the firewall, such as https, dns, and cockpit. The SSH service is notably absent. On systems using firewalld, services must be explicitly allowed, even if the daemon itself is running and listening on the correct port.
As a result, incoming SSH connection attempts are being blocked by the firewall, preventing users from accessing the server remotely after reboot. This aligns precisely with option B.
The other options are incorrect. DNS is functioning, as shown by successful ping responses. System load is low and not contributing to the issue. There is no indication that users are attempting to access the web server using an incorrect protocol.
Linux+ V8 documentation emphasizes that administrators must verify both service status and firewall rules when diagnosing access issues. In this case, allowing SSH with a command such as firewall-cmd --add- service=ssh --permanent followed by a reload would resolve the problem.
NEW QUESTION # 128
A systems administrator troubleshoots a connectivity issue and needs to determine whether port
449 is open. Which of the following commands should the administrator use?
Answer: B
Explanation:
This command displays active and listening network sockets, allowing the administrator to verify whether port 449 is open by checking for its presence in the socket list.
NEW QUESTION # 129
Which of the following passwords is the most complex?
Answer: B
Explanation:
This password is the most complex because it uses uppercase and lowercase letters, numbers, and multiple special characters, making it significantly harder to guess or brute-force compared to the others.
NEW QUESTION # 130
A new drive was recently added to a Linux system. Using the environment and tokens provided, complete the following tasks:
* Create an appropriate device label.
* Format and create an ext4 file system on the new partition.
The current working directory is /.
Answer:
Explanation:
Explanation:
To create an appropriate device label, format and create an ext4 file system on the new partition, you can use the following commands:
To create a GPT (GUID Partition Table) label on the new drive /dev/sdc, you can use the parted command with the -s option (for script mode), the device name (/dev/sdc), the mklabel command, and the label type (gpt). The command is:
parted -s /dev/sdc mklabel gpt
To create a primary partition of 10 GB on the new drive /dev/sdc, you can use the parted command with the -s option, the device name (/dev/sdc), the mkpart command, the partition type (primary), the file system type (ext4), and the start and end points of the partition (1 and 10G). The command is:
parted -s /dev/sdc mkpart primary ext4 1 10G
To format and create an ext4 file system on the new partition /dev/sdc1, you can use the mkfs command with the file system type (ext4) and the device name (/dev/sdc1). The command is:
mkfs.ext4 /dev/sdc1
You can verify that the new partition and file system have been created by using the lsblk command, which will list all block devices and their properties.
NEW QUESTION # 131
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