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CompTIA XK0-006 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Services and User Management: Covers day-to-day Linux administration including file management, user accounts, processes, software, services, and container operations.
Topic 2
  • Automation, Orchestration, and Scripting: Covers task automation with tools like Ansible, shell and Python scripting, Git version control, and responsible AI-assisted development.
Topic 3
  • Troubleshooting: Addresses diagnosing and resolving issues across system health, hardware, storage, networking, security configurations, and performance optimization.
Topic 4
  • Security: Focuses on securing Linux systems through authentication, firewalls, OS hardening, account policies, cryptography, and compliance checks.

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CompTIA Linux+ Certification Exam Sample Questions (Q108-Q113):

NEW QUESTION # 108
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: B

Explanation:
The server is running and responding to pings, and DNS resolves correctly (dig server1 →
192.168.0.2). The ss -lnt output shows SSH (port 22) is listening, but the firewall (firewall-cmd -- list-all) does not list SSH among the allowed services. Therefore, external users cannot connect because the firewall is blocking SSH.


NEW QUESTION # 109
An administrator receives a report that a user is unable to execute the runreports utility. The administrator logs in as the user, runs the following commands, and receives the following output:
$ runreports
runreports: command not found
$ ls -l /usr/local/bin
-rwxr-xr-x 1 root root 29 May 10 11:31 runreports
$ echo $PATH
/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
Which of the following best describes the issue and how to resolve it?

Answer: C

Explanation:
In Linux, for a command to be executed by its name alone (without an absolute or relative path), the directory containing the executable must be listed in the user ' s PATH environment variable. According to the CompTIA Linux+ V8 objectives, troubleshooting " command not found " errors requires an investigation of the binary ' s location versus the current PATH configuration.
In this scenario, the utility runreports is located in /usr/local/bin. However, the output of echo $PATH reveals that /usr/local/bin is not present in the search directories. The current PATH includes /usr/sbin, /usr/bin, /sbin,
/bin, and others, but specifically excludes the location of the utility. Because the shell cannot find the file in any of its defined search paths, it returns " command not found. " To resolve this issue permanently for the user, the administrator should add /usr/local/bin to the user ' s PATH by modifying a shell initialization file, such as ~/.bash_profile or ~/.bashrc. Adding the line export PATH=$PATH:/usr/local/bin ensures the directory is included in future sessions.
The other options are incorrect based on the provided evidence. Option B is wrong because the ls -l output shows the file has r-x permissions for " others, " meaning the user can already execute it despite not being the owner. Option C is unlikely because SELinux typically results in " Permission Denied, " not " Command Not Found. " Option D is also incorrect as the ls -l output clearly shows the execute (x) bit is already set for all users (755).
Therefore, the missing PATH entry is the verified root cause.


NEW QUESTION # 110
Which of the following best describes journald?

Answer: A

Explanation:
journald, part of systemd, is the core logging service in modern Linux systems and is covered under Linux+ V8 logging and monitoring objectives.
The correct description is A. systemd-journald collects, stores, and indexes logging data from the kernel, system services, and applications. Logs are stored in a structured, binary format and can be queried using journalctl. Journald supports metadata tagging, log filtering, and centralized logging integration.
Option B refers to kernel crash dump mechanisms like kdump. Option C describes filesystem journaling (such as ext4 journaling). Option D refers to auditd, which manages security audit logs.
Linux+ V8 documentation clearly distinguishes journald from other logging and auditing services. Therefore, the correct answer is A.


NEW QUESTION # 111
A newly hired Linux administrator needs to grant access to the Linux servers by generating a password-protected RSA key of 4096 bytes. Which of the following commands will accomplish this task?

Answer: B

Explanation:
The ssh-keygencommand is used to generate SSH key pairs. To generate an RSA key with a length of 4096 bits, the correct syntax is:
-t rsa: Specifies the type of key to generate, which is RSA.

-b 4096: Specifies the number of bits for the key, in this case 4096.

By running this command, the user will be prompted to enter a passphrase to password-protect the key, which satisfies the requirement for generating a password-protected RSA key of 4096 bits.


NEW QUESTION # 112
To perform a live migration, which of the following must match on both host servers? (Choose two)

Answer: A,E

Explanation:
Live migration is a virtualization feature that allows a running virtual machine to be moved from one host to another with minimal or no downtime. This topic falls under System Management in the CompTIA Linux+ V8 objectives, particularly in the areas of virtualization and resource management.
For a live migration to succeed, the CPU architecture must match between the source and destination hosts.
This is critical because the running virtual machine's CPU state, instruction set, and registers must be compatible with the destination system. Migrating between different CPU architectures (for example, x86_64 to ARM) is not supported and would cause the virtual machine to fail. Therefore, option D is required.
Additionally, the destination host must have sufficient available memory to accommodate the virtual machine being migrated. During live migration, the memory contents of the running VM are copied from the source host to the destination host while the VM continues to run. If enough memory is not available, the migration cannot complete successfully. This makes option E mandatory.
The other options are not strict requirements. USB ports do not need to match for live migration. Network speed may affect migration performance but does not need to be identical. Available swap space is not directly required for migration. Disk storage paths do not need to match as long as shared storage or compatible storage access is available.
Linux+ V8 documentation emphasizes CPU compatibility and memory availability as core prerequisites for live migration. Therefore, the correct answers are D and E.


NEW QUESTION # 113
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