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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Scripting, Containers & Automation | 20% | - Automation and scripting
|
| Topic 2: Troubleshooting | 25% | - System and network troubleshooting
|
| Topic 3: Security | 25% | - System security and access control
|
| Topic 4: System Management | 30% | - Linux installation, configuration, and system management
|
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NEW QUESTION # 186
A Linux administrator wants to add a user to the Docker group without changing their primary group. Which of the following commands should the administrator use to complete this task?
Answer: C
Explanation:
The usermod -aG command appends (-a) the user to a supplementary group (-G) without changing their primary group. This is the correct way to add a user to the docker group.
NEW QUESTION # 187
A systems administrator needs to integrate a new storage array into the company ' s existing storage pool. The administrator wants to ensure that the server is able to detect the new storage array. Which of the following commands should the administrator use to ensure that the new storage array is presented to the systems?
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
The lsscsi command is used to list information about SCSI devices (including storage arrays) that are attached to the system. This is critical when integrating a new storage array because it allows the administrator to verify that the operating system detects the new device at the SCSI layer, which is the underlying interface for most enterprise storage solutions. lsscsi outputs a list of recognized SCSI devices, their device nodes, and associated information.
Other options:
B). lsusb: Lists USB devices, not storage arrays on SCSI/SATA/SAS.
C). lsipc: Displays information on IPC (inter-process communication) facilities, unrelated to hardware detection.
D). lshw: Lists hardware details and can show storage, but lsscsi is specifically designed for SCSI device detection and is the most direct method for this task.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 7: " Managing Storage " , Section: " Identifying and Accessing Storage Devices " CompTIA Linux+ XK0-006 Objectives: Domain 4.0 - Storage and Filesystems
NEW QUESTION # 188
A systems administrator is working on an SFTP server configuration. Which of the following commands will best enable the connectivity to that service from the 10.10.0.0/24 network?
Answer: D
Explanation:
The command sudo ufw allow from 10.10.0.0/24to any port 22 explicitly opens TCP port 22 (used by SFTP/SSH) only for hosts in the 10.10.0.0/24 network.
NEW QUESTION # 189
Due to application compatibility issues, the Python 3 OpenSSL library should not be upgraded. Which of the following commands should the systems administrator use to ensure the package stays at the current version?
Answer: A
Explanation:
Package management is a critical system management task covered extensively in the Linux+ V8 objectives.
On Debian-based systems (like Ubuntu), administrators often need to " pin " or " hold " a specific package version to prevent it from being automatically updated during a general system upgrade (apt upgrade). This is commonly done to avoid breaking applications that have strict version dependencies.
The modern and most direct way to accomplish this is using the apt-mark utility. The command apt-mark hold
< package_name > marks the package as " on hold " in the package manager database. Once a package is on hold, apt will skip it during upgrades until an administrator explicitly runs apt-mark unhold.
While Option D (echo " package hold " | dpkg --set-selections) is a valid legacy method, apt-mark hold (Option C) is the preferred and more user-friendly standard in contemporary Linux administration. Option A has incorrect syntax for dpkg. Option B uses a non-existent command (set-selections is a sub-module of dpkg, not apt).
Therefore, apt-mark hold is the verified correct answer for ensuring a package remains at its current version.
NEW QUESTION # 190
Which of the following commands sets all the directories' permissions recursively in the user's home directory and makes them accessible only to the user?
Answer: B
Explanation:
This command searches for all directories within the user's home directory and sets their permissions to allow access only by the owning user, ensuring privacy and proper access control.
NEW QUESTION # 191
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