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| Section | Weight | Objectives |
|---|---|---|
| Security | 21% | - Configure SELinux and security contexts - Implement security hardening - Manage file security and access controls - Perform vulnerability assessments - Apply best practices for permissions and authentication - Manage firewalls |
| System Management | 32% | - Manage files and directories - Manage system components - Manage kernel modules - Manage networking - Manage storage - Perform basic Linux tasks - Manage packages and software - Configure storage and cloud/virtualization technologies - Manage permissions and ownership - Manage users and groups - Configure kernel modules and network parameters - Manage devices - Manage the Linux boot process |
| Scripting, Containers, and Automation | 19% | - Manage orchestration processes - Write and execute BASH shell scripts - Automate administration with Python and configuration management tools - Implement automation workflows - Deploy and manage containers (Docker/Podman) - Manage version control using Git |
| Troubleshooting | 28% | - Troubleshoot network connectivity (firewall, routing, DNS) - Troubleshoot system properties and processes - Optimize performance (CPU, memory, I/O) - Troubleshoot hardware issues - Troubleshoot security issues (SELinux, permissions) - Troubleshoot application issues - Monitor system logs, health, and events - Troubleshoot user issues |
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NEW QUESTION # 150
Following the completion of monthly server patching, a Linux administrator receives reports that a critical application is not functioning. Which of the following commands should help the administrator determine which packages were installed?
Answer: B
Explanation:
Package management troubleshooting is a critical Linux administration skill addressed in CompTIA Linux+ V8. After system patching, identifying which packages were installed, updated, or removed is often the first step in diagnosing application failures.
The dnf history command is specifically designed for this purpose. It displays a chronological list of all DNF transactions, including installations, upgrades, downgrades, and removals. Each transaction is assigned an ID and includes timestamps, affected packages, and actions taken. This allows administrators to correlate application failures with recent changes.
Option A is correct because it provides historical context rather than just current package state. Linux+ V8 documentation highlights dnf history as an essential auditing and rollback tool.
The other options are insufficient. dnf list shows installed or available packages but does not indicate when they were installed. dnf info displays metadata for a specific package but does not show transaction history.
dnf search is used to find packages by name or description.
By reviewing recent transactions with dnf history, administrators can quickly identify problematic updates and take corrective action, such as rolling back a package.
Therefore, the correct answer is A.
NEW QUESTION # 151
Which of the following utilities supports the automation of security compliance and vulnerability management?
Answer: B
Explanation:
OpenSCAP is a framework that automates security compliance checking and vulnerability management by using standardized security content (SCAP). It helps administrators enforce policies and detect vulnerabilities.
NEW QUESTION # 152
A systems administrator needs to restore a backup to the /usr/app/data directory. Which of the following commands should the administrator use for this task?
Answer: B
Explanation:
The tar (tape archive) utility is the standard tool for archiving and compressing files in Linux.
According to CompTIA Linux+ V8 objectives, administrators must be proficient in extracting data into specific target locations. The command tar -xvzf /tmp/backup.tar.gz -C /usr/app/data is the correct syntax for this operation.
The flags used in the command provide the following functionality:
-x: Instructs tar to extract the contents of the archive.
-v: Enables verbose output, showing the files as they are being extracted.
-z: Tells tar to filter the archive through gzip for decompression (required for .tar.gz files).
-f: Specifies the filename of the archive to be processed (/tmp/backup.tar.gz).
-C: Changes the directory to the specified path (/usr/app/data) before performing the extraction.
Using the -C flag is the most efficient and recommended way to restore a backup to a directory other than the current working directory. Without this flag, tar would extract the files into the current directory, which might not be the intended destination and could clutter the filesystem.
NEW QUESTION # 153
You are a systems administrator and have created an uncompressed backup of the application directory. Several hours later, you must restore the application from backup.
INSTRUCTIONS
Within each tab, click on an object to form the appropriate command used to create the backup and restore the application.
Command objects may only be used once, and not all will be used. Click the arrow to remove any unwanted objects from your command.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
see the solution in Explanation below.
Explanation:
This performance-based question tests correct use of the tar utility for backup and restore operations, which is part of System Management in CompTIA Linux+ V8. The key detail is that the backup is explicitly described as uncompressed, so the correct archive file must be a plain .tar file rather than .tar.gz, .tgz, or .tar.bz2.
For the backup command, the correct syntax is:
tar -cvf /backups/application.tar -C /opt/ application
Here, -c creates the archive, -v enables verbose output, and -f specifies the archive filename. The -C /opt/ option changes to the /opt/ directory before archiving, and application is then archived relative to that location. This is the correct Linux+ method because it avoids storing unnecessary leading path components in the archive.
For the restore command, the correct syntax is:
tar -xvf /backups/application.tar -C /opt/
Here, -x extracts the archive, -v displays files being restored, and -f identifies the archive file. The -C /opt/ option ensures the archived application directory is restored back into /opt/, recreating /opt/application correctly.
The other file choices such as /backups/application.tar.gz, /backups/application.tgz, and /backups/application.
tar.bz2 are incorrect because they indicate compressed backups, which the question specifically rules out.
Likewise, options such as -xzvf or -xjvf are used for gzip- or bzip2-compressed archives and would not apply here.
Therefore, the verified correct PBQ answers are:
Backup: tar -cvf /backups/application.tar -C /opt/ application
Restore: tar -xvf /backups/application.tar -C /opt/
NEW QUESTION # 154
Which of the following commands would a Linux administrator use to determine the temperature of a motherboard?
Answer: A
Explanation:
The correct answer is D. lm_sensors because it is the standard Linux utility used to monitor hardware sensor data, including motherboard temperature, CPU temperature, fan speeds, and voltage levels. The lm_sensors package provides tools such as the sensors command, which reads data from hardware monitoring chips embedded on the motherboard and displays real-time environmental and thermal information.
In Linux system management, monitoring hardware health is critical for maintaining system stability and preventing overheating issues. After installing and configuring lm_sensors (typically using the sensors-detect command), administrators can run sensors to view temperature readings for various components, including the motherboard chipset.
Option A (ipmitool) is partially related but incorrect in this context. While ipmitool can retrieve hardware monitoring data (including temperature) via IPMI interfaces, it requires compatible server hardware with IPMI support. It is not universally applicable across all Linux systems and is more specialized for enterprise server environments.
Option B (dmidecode) is incorrect because it retrieves hardware information from the system BIOS/firmware, such as manufacturer details, serial numbers, and hardware specifications. It does not provide real-time sensor data like temperature readings.
Option C (lspci) is also incorrect because it lists PCI devices and provides information about connected hardware components, but it does not include environmental or thermal data.
From a Linux+ perspective, lm_sensors is the most appropriate and commonly used tool for monitoring system temperatures and other hardware metrics, making it essential for proactive system management and troubleshooting.
NEW QUESTION # 155
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