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XK0-006試験問題の最大の利点は、時間と市場の試練に耐えることです。それは、誠実で温かいサービスです。受験者がXK0-006試験に合格できるように、完璧な製品とサービスシステムを確立しています。対応する製品とサービスをお楽しみいただける、適切で満足のいくXK0-006試験問題を提供できます。絶対に100％良いとは言えませんが、すべての顧客にサービスを提供するために最善を尽くしています。このようにして初めて、顧客を維持し、長期的な協力パートナーになれます。 XK0-006テストガイドへの転送をお試しください。
質問 # 111
Which of the following references is recognized and used for guiding the configuration of operating systems and applications to ensure compliance with security best practices on Linux servers?
正解：C
解説：
CIS Benchmarks provide detailed, consensus-based configuration guidelines specifically designed to harden operating systems and applications and ensure compliance with recognized security best practices.
質問 # 112
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?
正解：B
解説：
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
質問 # 113
A systems administrator must provide privileged access to a specific user in a Linux system.
Which of the following commands should the administrator use?
正解：C
解説：
Adding the user to the sudo group grants privileged access by allowing the user to execute commands with elevated permissions through sudo, which is the standard and supported method on Linux systems.
質問 # 114
You are a systems administrator and have created an uncompressed backup of the application directory. Several hours later, you must restore the application from backup.
INSTRUCTIONS
Within each tab, click on an object to form the appropriate command used to create the backup and restore the application.
Command objects may only be used once, and not all will be used. Click the arrow to remove any unwanted objects from your command.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
正解：
解説：
see the solution in Explanation below.
Explanation:
This performance-based question tests correct use of the tar utility for backup and restore operations, which is part of System Management in CompTIA Linux+ V8. The key detail is that the backup is explicitly described as uncompressed, so the correct archive file must be a plain .tar file rather than .tar.gz, .tgz, or .tar.bz2.
For the backup command, the correct syntax is:
tar -cvf /backups/application.tar -C /opt/ application
Here, -c creates the archive, -v enables verbose output, and -f specifies the archive filename. The -C /opt/ option changes to the /opt/ directory before archiving, and application is then archived relative to that location. This is the correct Linux+ method because it avoids storing unnecessary leading path components in the archive.
For the restore command, the correct syntax is:
tar -xvf /backups/application.tar -C /opt/
Here, -x extracts the archive, -v displays files being restored, and -f identifies the archive file. The -C /opt/ option ensures the archived application directory is restored back into /opt/, recreating /opt/application correctly.
The other file choices such as /backups/application.tar.gz, /backups/application.tgz, and /backups/application.
tar.bz2 are incorrect because they indicate compressed backups, which the question specifically rules out.
Likewise, options such as -xzvf or -xjvf are used for gzip- or bzip2-compressed archives and would not apply here.
Therefore, the verified correct PBQ answers are:
Backup: tar -cvf /backups/application.tar -C /opt/ application
Restore: tar -xvf /backups/application.tar -C /opt/
質問 # 115
The security manager at a company notifies a systems administrator of open vulnerabilities on the Linux system. The administrator receives the following information while logged in to the server:
Which of the following is the most likely security concern?
正解：C
解説：
The package management history shows that the last system update occurred over a year ago, which strongly indicates that security patches and vulnerability fixes have not been applied, leaving the system exposed to known vulnerabilities.
質問 # 116
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