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NEW QUESTION # 74
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: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
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.
Other options:
* A. groupadd is for creating new groups, not adding users to groups.
* B. groupmod is for modifying group properties, not user membership.
* C. useradd creates new users; not applicable to existing users.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 6: "User and Group Management", Section:
"Modifying Group Membership"
CompTIA Linux+ XK0-006 Objectives, Domain 1.0: System Management
NEW QUESTION # 75
Which of the following most accurately describes a webhook?
Answer: C
Explanation:
A webhook is an HTTP-based callback that allows one system to send real-time data or notifications to another system when an event occurs.
NEW QUESTION # 76
A systems administrator wants to review the amount of time the NetworkManager service took to start. Which of the following commands accomplishes this goal?
Answer: C
Explanation:
System boot performance analysis is an important system management task included in Linux+ V8. When administrators need to determine how long services take to start during boot, systemd analysis tools are required.
The correct command is systemd-analyze blame. This command lists all systemd services and shows how long each one took to initialize during the boot process. It is commonly used to identify slow-starting services that may impact system startup performance, including NetworkManager.
The other options are incorrect. resolvectl is used for DNS resolution management and provides no service timing information. journalctl can display logs but does not provide a clear, summarized service startup timing report. systemctl daemon-reload only reloads systemd unit files and does not perform analysis.
Linux+ V8 documentation explicitly references systemd-analyze blame as the correct tool for diagnosing service startup delays. Therefore, the correct answer is D.
NEW QUESTION # 77
A systems administrator is decommissioning a service. Which of the following commands should the administrator use to make sure users cannot start the service again?
Answer: D
Explanation:
This command prevents the service from being started manually or automatically by linking it to a null target, ensuring it cannot be restarted even if another service or user attempts to start it.
NEW QUESTION # 78
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: A
Explanation:
The dnf history command shows a log of past package operations (install, update, remove), allowing the administrator to review which packages were installed or updated during the patching process.
NEW QUESTION # 79
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