Free PDF Quiz 2025 CompTIA Perfect XK0-005 Exam PDF

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The XK0-005 exam is designed for individuals with a minimum of 12 months of Linux administration experience. It is recommended that candidates have a CompTIA A+ and CompTIA Network+ certification, or equivalent experience, before attempting XK0-005 exam. Upon passing the exam, candidates will earn the CompTIA Linux+ certification, which is recognized by employers worldwide as a valuable credential for IT professionals working with Linux operating systems.

To prepare for the CompTIA Linux+ certification exam, candidates can choose from various resources, including books, online courses, practice exams, and hands-on experience. XK0-005 Exam consists of 90 multiple-choice and performance-based questions, and candidates have 90 minutes to complete it. The passing score for the exam is 720 out of 900.

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CompTIA Linux+ Certification Exam Sample Questions (Q256-Q261):

NEW QUESTION # 256
A Linux administrator needs to resolve a service that has failed to start. The administrator runs the following command:

The following output is returned

Which of the following is MOST likely the issue?

A. The service does not have permissions to read write the startupfile.
B. The service startupfile cannot be owned by root.
C. The service startupfile should not be owned by the root group.
D. The service startupfile size cannot be 81k.

Answer: A

Explanation:
The most likely issue is that the service does not have permissions to read or write the startupfile. The output of systemct1 status startup.service shows that the service has failed to start and the error message is
"Permission denied". The output of ls -l /etc/startupfile shows that the file has the permissions -rw-r--r--, which means that only the owner (root) can read and write the file, while the group (root) and others can only read the file. The service may not run as root and may need write access to the file. The administrator should change the permissions of the file by using the chmod command and grant write access to the group or others, or change the owner or group of the file by using the chown command and assign it to the user or group that runs the service. The other options are incorrect because they are not supported by the outputs. The file size, owner, and group are not the causes of the issue. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 11: Managing Files and Directories, pages 345-346.

NEW QUESTION # 257
A systems administrator is configuring a Linux system so that network traffic from the internal network
172.17.0.0/16 going out through the eth0 interface would appear as if it was sent directly from this interface.
Which of the following commands will accomplish this task?

A. iptables -A POSTROUTING -s 172.17.0.0/16 -o eth0 -j MASQUERADE
B. nmcli snasq-traffic eth0 -s 172.17.0.0/16 -j MASQUERADE
C. firewalld -A OUTPUT -s 172.17.0.0/16 -o eth0 -j DIRECT
D. ifconfig --nat eth0 -s 172.17.0.0/16 -j DIRECT

Answer: A

Explanation:
The command iptables -A POSTROUTING -s 172.17.0.0/16 -o eth0 -j MASQUERADE configures Network Address Translation (NAT) using iptables. This ensures that traffic from the internal network (172.17.0.0/16) going out through the eth0 interface will appear to be originating from the eth0 IP address. This is commonly used for internet-sharing or NAT setups in Linux.

NEW QUESTION # 258
An administrator transferred a key for SSH authentication to a home directory on a remote server. The key file was moved to .ssh/authorized_keys location in order to establish SSH connection without a password.
However, the SSH command still asked for the password. Given the following output:

Which of the following commands would resolve the issue?

A. chown root:root .ssh/authorized_keys
B. ssh_keygen -t rsa -o .ssh/authorized_keys
C. restorecon .ssh/authorized_keys
D. chmod 600 .ssh/authorized_keys

Answer: D

Explanation:
The command that would resolve the issue is chmod 600 .ssh/authorized_keys. This command will change the permissions of the .ssh/authorized_keys file to 600, which means that only the owner of the file can read and write it. This is necessary for SSH key authentication to work properly, as SSH will refuse to use a key file that is accessible by other users or groups for security reasons. The output of ls -l shows that currently the .ssh
/authorized_keys file has permissions of 664, which means that both the owner and group can read and write it, and others can read it.
The other options are not correct commands for resolving the issue. The restorecon .ssh/authorized_keys command will restore the default SELinux security context for the .ssh/authorized_keys file, but this will not change its permissions or ownership. The ssh_keygen -t rsa -o .ssh/authorized_keys command is invalid because ssh_keygen is not a valid command (the correct command is ssh-keygen), and the -o option is used to specify a new output format for the key file, not the output file name. The chown root:root .ssh
/authorized_keys command will change the owner and group of the .ssh/authorized_keys file to root, but this will not change its permissions or make it accessible by the user who wants to log in with SSH key authentication. References: How to Use Public Key Authentication with SSH; chmod(1) - Linux manual page

NEW QUESTION # 259
A systems administrator needs to run the yum update command two hours after employees log off and leave for the day on Friday.
Which of the following is the BEST command to complete the task, if the task only needs to be run once?

A. nohup
B. cron
C. screen
D. at

Answer: D

Explanation:
nohup Run the named command with its optional command arguments, continuing to run it even after you log out (make command immune to hangups-i.e., no hangup), since the admin wants to run the job after 2 hours, it would be easier to cron the job with AT.
AT:
at is a command-line utility that allows you to schedule commands to be executed at a particular time. Jobs created with at are executed only once. In this article, we will explain how to use at and its companion utilities batch, atq, atrm to view, delete, and create jobs to be executed at a later time.

NEW QUESTION # 260
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 accounting:user1 script.sh
chmod 057 script.sh
B. chown user2:accounting script.sh
chmod 750 script.sh
C. chown user2:accounting script.sh
chmod u+x script.sh
D. chown user1:accounting script.sh
chmod 777 script.sh

Answer: B

Explanation:
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.

NEW QUESTION # 261
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Free PDF Quiz 2025 CompTIA Perfect XK0-005 Exam PDF

Pass Guaranteed Quiz CompTIA - XK0-005 High Hit-Rate Exam PDF

CompTIA Linux+ Certification Exam Sample Questions (Q256-Q261):

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