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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 22% | - System and hardware issues
|
| Services and User Management | 20% | - User and group administration
|
| Automation and Scripting | 17% | - Shell scripting and automation
|
| System Management | 23% | - Installation, configuration, and maintenance
|
| Security | 18% | - System hardening and compliance
|
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NEW QUESTION # 52
An average of one out of three users in a company cannot reach the company website. A Linux administrator determines that one of the three website servers is down. The administrator inspects the DNS configuration for the website and notices the following entry:
Which of the following accurately explains the issue?
Answer: C
Explanation:
With multiple A records, DNS performs simple round-robin ordering and returns the records in a different sequence on each query. Most clients try the first address returned-so when the downed server's IP appears first (about one in three times), those users cannot connect.
NEW QUESTION # 53
A systems administrator receives reports from users who are having issues while trying to modify newly created files in a shared directory. The administrator sees the following outputs:
Which of the following provides the best resolution to this issue?
Answer: D
Explanation:
This scenario involves shared directory collaboration, which is a common system management task covered in the CompTIA Linux+ V8 objectives. The key issue is that users can create files in the shared directory, but other users in the same group cannot modify those files. This behavior is directly related to group ownership inheritance.
By default, when a user creates a file or directory, it is owned by the user and assigned the user's primary group, not necessarily the group of the parent directory. As shown in the output, files inside /share are owned by different groups (student, student2, student3), which prevents other group members from modifying them, even though the parent directory is group-writable.
The correct solution is to set the setgid (set group ID) bit on the shared directory, making option D correct.
When the setgid bit is applied to a directory, all newly created files and subdirectories inherit the group ownership of the parent directory, rather than the creator's primary group. This ensures consistent group ownership and allows all members of the shared group to collaborate effectively.
The other options are incorrect or poor practice. Option A (setuid) is intended for executables, not directories.
Option B requires constant manual intervention and does not scale. Option C weakens security by granting write access to all users, violating the principle of least privilege.
Linux+ V8 documentation explicitly recommends using the setgid bit on shared directories to manage collaborative access securely and efficiently.
NEW QUESTION # 54
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: D
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 # 55
A systems administrator is working on configuration changes and needs to replace a hostname in a specific file. Which of the following commands should the administrator use to complete this task?
Answer: B
Explanation:
This command performs an in-place substitution, replacing the specified hostname directly within the file, which is the correct and efficient method for modifying configuration values without creating intermediate files.
NEW QUESTION # 56
A systems administrator wants to terminate all the processes owned by testuser on a Linux VM.
Which of the following should the administrator use for this task?
Answer: A
Explanation:
This command identifies all processes owned by the specified user by extracting their process IDs and then terminates each one, ensuring that all running processes belonging to that user are stopped.
NEW QUESTION # 57
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