試験の準備方法-実用的なXK0-005資格トレーリング試験-最新のXK0-005試験攻略

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CompTIA XK0-005認定試験は、システムアーキテクチャ、Linuxインストールとパッケージ管理、Linuxコマンドラインツール、スクリプトと自動化、ネットワークの基礎、セキュリティなど、幅広いトピックをカバーしています。試験の目的は、Linuxシステム管理者に必要な主要なスキルと知識をカバーするように設計されています。試験は、複数選択肢の問題から構成され、候補者には90分間の試験時間が与えられます。

CompTIA Linux+認定試験（XK0-005）は、Linuxオペレーティングシステムに強い基盤を持ちたいITプロフェッショナルを対象に設計されています。この認定試験はベンダー中立であり、特定のLinuxディストリビューションに結び付けられていないことを意味します。これにより、候補者はUbuntu、Debian、Fedoraなど、異なるディストリビューション間でLinuxの知識とスキルを示すことができます。XK0-005認定試験は、以前のCompTIA Linux+試験（LX0-103およびLX0-104）の更新版であり、コアのLinuxコンセプト、システム管理タスク、および高度なLinux管理スキルをカバーしています。

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CompTIA XK0-005、またはCompTIA Linux+認定試験とも呼ばれるこの試験は、Linuxオペレーティングシステムで作業するIT専門家のスキルと知識を検証するために設計されたベンダー中立の認定試験です。CompTIA Linux+は、Linux管理、セキュリティ、トラブルシューティングの専門知識を証明したいIT専門家にとって、非常に尊重される認定資格と考えられています。

CompTIA Linux+ Certification Exam 認定 XK0-005 試験問題 (Q524-Q529):

質問 # 524
SIMULATION
You have been asked to parse a log file of logins to determine various information about who is logging in and when.
INSTRUCTIONS
Open and inspect the Login log file.
Drag and drop the correct commands onto the output that was generated from that command.
Tokens can be used only once and not all will be used.
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：

質問 # 525
One leg of an LVM-mirrored volume failed due to the underlying physical volume, and a systems administrator is troubleshooting the issue. The following output has been provided:

Given this scenario, which of the following should the administrator do to recover this volume?

A. Replace the failed drive and reconfigure the mirror.
B. Reboot the server. The volume will automatically go back to linear mode.
C. Recreate the logical volume.
D. Reboot the server. The volume will revert to stripe mode.

正解：A

解説：
The administrator should replace the failed drive and reconfigure the mirror to recover the volume. The LVM (Logical Volume Manager) is a tool for managing disk space on Linux systems. The LVM allows the administrator to create logical volumes that span across multiple physical volumes, such as hard disks or partitions. The LVM also supports different types of logical volumes, such as linear, striped, or mirrored. A mirrored logical volume is a type of logical volume that creates a copy of the data on another physical volume, providing redundancy and fault tolerance. The output shows that the logical volume is mirrored and that one leg of the mirror has failed due to the underlying physical volume. This means that one of the physical volumes that contains the data of the logical volume is damaged or missing. This can cause data loss and performance degradation. The administrator should replace the failed drive and reconfigure the mirror to recover the volume. The administrator should identify the failed physical volume by using commands such as pvdisplay, vgdisplay, or lvdisplay. The administrator should then remove the failed physical volume from the volume group by using the vgreduce command. The administrator should then install a new drive and create a new physical volume by using the pvcreate command. The administrator should then add the new physical volume to the volume group by using the vgextend command. The administrator should then reconfigure the mirror by using the lvconvert command. The administrator should replace the failed drive and reconfigure the mirror to recover the volume. This is the correct answer to the question. The other options are incorrect because they either do not recover the volume (reboot the server. The volume will automatically go back to linear mode or reboot the server. The volume will revert to stripe mode) or do not preserve the data of the volume (recreate the logical volume). Reference: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Storage, pages 333-334.

質問 # 526
User1 is a member of the accounting group. Members of this group need to be able to execute but not make changes to a script maintained by User2. The script should not be accessible to other users or groups. Which of the following will give proper access to the script?

A. chown user2:accounting script.shchmod u+x script.sh
B. chown accounting:user1 script.shchmod 057 script.sh
C. chown user1:accounting script.shchmod 777 script.sh
D. chown user2:accounting script.shchmod 750 script.sh

正解：D

解説：
The commands that will give proper access to the script are:
chown user2:accounting script.sh: This command will change the ownership of the script to user2 as the owner and accounting as the group. The chown command is a tool for changing the owner and group of files and directories on Linux systems. The user2:accounting is the user and group name that the command should assign to the script. The script.sh is the name of the script that the command should modify. The command chown user2:accounting script.sh will ensure that user2 is the owner of the script and accounting is the group of the script, which will allow user2 to maintain the script and the accounting group to access the script.
chmod 750 script.sh: This command will change the permissions of the script to 750, which means read, write, and execute for the owner; read and execute for the group; and no access for others. The chmod command is a tool for changing the permissions of files and directories on Linux systems. The permissions are represented by three digits in octal notation, where each digit corresponds to the owner, group, and others. Each digit can have a value from 0 to 7, where each value represents a combination of read, write, and execute permissions. The 750 is the permission value that the command should assign to the script. The script.sh is the name of the script that the command should modify. The command chmod 750 script.sh will ensure that only the owner and the group can execute the script, but not make changes to it, and that the script is not accessible to other users or groups.
The commands that will give proper access to the script are chown user2:accounting script.sh and chmod 750 script.sh. This is the correct answer to the question. The other options are incorrect because they either do not give proper access to the script (chown user1:accounting script.sh or chown accounting:user1 script.sh) or do not change the permissions of the script (chmod 777 script.sh or chmod u+x script.sh). Reference: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 11: Managing File Permissions and Ownership, pages 346-348.

質問 # 527
Users have been unable to reach www.comptia.org from a Linux server. A systems administrator is troubleshooting the issue and does the following:
Based on the information above, which of the following is causing the issue?

A. The name www.comptia.org does not point to a valid IP address.
B. No default route is set on the server.
C. The server 192.168.168.53 is unreachable.
D. The network interface eth0 is disconnected.

正解：C

解説：
The issue is caused by the server 192.168.168.53 being unreachable. This server is the DNS server configured in the /etc/resolv.conf file, which is used to resolve domain names to IP addresses. The ping command shows that the server cannot be reached, and the nslookup command shows that the name www.comptia.org cannot be resolved using this server. The other options are incorrect because:
The name www.comptia.org does point to a valid IP address, as shown by the nslookup command using another DNS server (8.8.8.8).
The default route is set on the server, as shown by the ip route command, which shows a default gateway of
192.168.168.1.
The network interface eth0 is connected, as shown by the ip link command, which shows a state of UP for eth0. References: CompTIA Linux+ Study Guide, Fourth Edition, page 457-458, 461-462.

質問 # 528
A systems administrator is receiving tickets from users who cannot reach the application app that should be listening on port 9443/tcp on a Linux server.
To troubleshoot the issue, the systems administrator runs netstat and receives the following output:
Based on the information above, which of the following is causing the issue?

A. The IP address 0.0.0.0 is not valid.
B. The application is listening on the loopback interface.
C. The application is listening on port 1234.
D. The application is not running.

正解：B

解説：
The server is in a "Listen" state on port 9943 using its loopback address. The "1234" is a process-id The cause of the issue is that the application is listening on the loopback interface. The loopback interface is a virtual network interface that is used for internal communication within the system. The loopback interface has the IP address 127.0.0.1, which is also known as localhost. The netstat output shows that the application is listening on port 9443 using the IP address 127.0.0.1. This means that the application can only accept connections from the same system, not from other systems on the network. This can prevent the users from reaching the application and cause the issue. The administrator should configure the application to listen on the IP address 0.0.0.0, which means all available interfaces, or on the specific IP address of the system that is reachable from the network. This will allow the application to accept connections from other systems and resolve the issue. The cause of the issue is that the application is listening on the loopback interface. This is the correct answer to the question. The other options are incorrect because they are not supported by the outputs. The IP address 0.0.0.0 is valid and means all interfaces, the application is not listening on port 1234, and the application is running as shown by the process ID 1234. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 12: Managing Network Connections, page 383.

質問 # 529
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CompTIA Linux+ Certification Exam 認定 XK0-005 試験問題 (Q524-Q529):

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