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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshooting | 22% | - System and hardware issues
|
| Topic 2: System Management | 23% | - Installation, configuration, and maintenance
|
| Topic 3: Security | 18% | - Access control and authentication
|
| Topic 4: Automation and Scripting | 17% | - Shell scripting and automation
|
| Topic 5: Services and User Management | 20% | - Service configuration and operation
|
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NEW QUESTION # 59
A Linux server is not starting up because files in the /boot/partition are corrupt. After the initial GRUB screen, the following message is displayed:
Probing EDD (edd=off to disable)... ok
uncompression error
--system halted
Which of the following steps should the Linux administrator take to recover the system without destroying the existing installation? (Choose two.)
Answer: B,C
Explanation:
Using rescue boot media lets you boot the machine, mount the existing partitions, and access the corrupted /boot files without reinstalling the OS.
Reinstalling the kernel packages restores the missing or corrupt files in /boot (e.g., vmlinuz and initramfs), allowing GRUB to load and uncompress the kernel properly.
NEW QUESTION # 60
A systems administrator needs to validate that the dm_multipathdriver was loaded in a Linux system. Which of the following commands should the administrator use?
Answer: B
Explanation:
lsmodlists currently loaded kernel modules; piping to grep dm_multipathconfirms whether that specific driver is active in the running kernel.
NEW QUESTION # 61
Which of the following best describes journald?
Answer: B
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 # 62
A systems administrator is reconfiguring existing user accounts in a Linux system. Which of the following commands should the administrator use to include "myuser" in the finance group?
Answer: A
Explanation:
To add an existing user (myuser) to an existing group (finance) without removing them from other groups, the correct command is usermod -aG finance myuser. The -aG option appends the user to the supplementary group(s) specified.
NEW QUESTION # 63
Which of the following can reduce the attack surface area in relation to Linux hardening?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Reducing the attack surface area in Linux hardening refers to limiting possible points of unauthorized access.
According to the CompTIA Linux+ Official Study Guide (Exam XK0-006), enforcing strong password policies is a critical aspect of security hardening. This practice ensures that user accounts are protected by passwords that are difficult to guess or crack, thus minimizing the risk of successful brute-force attacks.
Implementing password complexity requirements (such as minimum length, use of uppercase, lowercase, numbers, and special characters) directly addresses one of the primary vectors for unauthorized access.
Other options do not have a direct impact on reducing the attack surface:
* A. Customizing the log-in banner serves as a legal notification and does not affect system vulnerabilities.
* B. Reducing the number of directories created is not related to hardening or access control.
* C. Extending the SSH startup timeout period may give attackers more time to attempt a connection and does not increase security.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 11: "Securing the System", Section:
"Implementing Password Policies"
CompTIA Linux+ XK0-006 Exam Objectives, Domain 3.0: Security
NEW QUESTION # 64
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