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CompTIA XK0-005 Exam is an excellent way for IT professionals to validate their Linux system administration skills and earn a globally recognized certification. With the increasing demand for Linux system administrators in the industry, the CompTIA Linux+ certification can open up new opportunities for career growth and advancement.

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CompTIA XK0-005 Exam, also known as the CompTIA Linux+ certification exam, is designed to test the knowledge and skills of IT professionals in the Linux operating system. XK0-005 exam covers a wide range of topics, including system architecture, security, installation and configuration, command line interface, and maintenance and troubleshooting. Passing XK0-005 exam demonstrates that an IT professional is capable of working with Linux at the entry-level.

CompTIA XK0-005 exam is an industry-recognized certification that validates the skills and knowledge of individuals seeking a career in Linux administration. CompTIA Linux+ Certification Exam certification is offered by CompTIA, a leading technology association that provides vendor-neutral IT certifications for professionals in various fields. The CompTIA Linux+ certification is designed to test the technical skills and knowledge required to configure, manage, and troubleshoot Linux systems.

CompTIA Linux+ Certification Exam Sample Questions (Q200-Q205):

NEW QUESTION # 200
A systems administrator is investigating an issue in which one of the servers is not booting up properly. The journalctl entries show the following:

Which of the following will allow the administrator to boot the Linux system to normal mode quickly?

A. Reformat the /opt/app filesystem and reboot.
B. Comment out the /opt/app filesystem in /etc/fstab and reboot.
C. Perform filesystem checks on local filesystems and reboot.
D. Trigger a filesystem relabel and reboot.

Answer: B

Explanation:
Explanation
The fastest way to boot the Linux system to normal mode is to comment out the /opt/app filesystem in
/etc/fstab and reboot. This will prevent the system from trying to mount the /opt/app filesystem at boot time, which causes an error because the filesystem does not exist or is corrupted. Commenting out a line in /etc/fstab can be done by adding a # symbol at the beginning of the line. Rebooting the system will apply the changes and allow the system to boot normally. Reformatting the /opt/app filesystem will not help to boot the system, as it will erase any data on the filesystem and require manual intervention to create a new filesystem.
Performing filesystem checks on local filesystems will not help to boot the system, as it will not fix the missing or corrupted /opt/app filesystem. Triggering a filesystem relabel will not help to boot the system, as it will only change the security context of files and directories according to SELinux policy. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 14: Managing Disk Storage, page 456.

NEW QUESTION # 201
A systems administrator is troubleshooting connectivity issues and trying to find out why a Linux server is not able to reach other servers on the same subnet it is connected to. When listing link parameters, the following is presented:

Based on the output above, which of following is the MOST probable cause of the issue?

A. The Ethernet broadcast address should be ac:00:11:22:33:ff instead.
B. The network interface eth0 is using an old kernel module.
C. The network interface cable is not connected to a switch.
D. The address ac:00:11:22:33:cd is not a valid Ethernet address.

Answer: C

Explanation:
The most probable cause of the connectivity issue is that the network interface cable is not connected to a switch. This can be inferred from the output of the ip link list dev eth0 command, which shows that the network interface eth0 has the NO-CARRIER flag set. This flag indicates that there is no physical link detected on the interface, meaning that the cable is either unplugged or faulty. The other options are not valid causes of the issue. The address ac:00:11:22:33:cd is a valid Ethernet address, as it follows the format of six hexadecimal octets separated by colons. The Ethernet broadcast address should be ff:ff:ff:ff:ff:ff, which is the default value for all interfaces. The network interface eth0 is not using an old kernel module, as it shows the UP flag, which indicates that the interface is enabled and ready to transmit data. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 14: Managing Networking

NEW QUESTION # 202
A Linux user reported the following error after trying to connect to the system remotely:
ssh: connect to host 10.0.1.10 port 22: Resource temporarily unavailable The Linux systems administrator executed the following commands in the Linux system while trying to diagnose this issue:

Which of the following commands will resolve this issue?

A. firewall-cmd --zone=public --permanent --add-service=ssh
B. firewall-cmd --zone=public --permanent --add-port=22/udp
C. firewall-cmd --zone=public --permanent --add-service=22
D. systemct1 enable firewalld; systemct1 restart firewalld

Answer: A

Explanation:
The firewall-cmd --zone=public --permanent --add-service=ssh command will resolve the issue by allowing SSH connections on port 22 in the public zone of the firewalld service. This command will add the ssh service to the permanent configuration of the public zone, which means it will persist after a reboot or a reload of the firewalld service. The firewall-cmd --zone=public --permanent --add-service=22 command is invalid, as 22 is not a valid service name. The systemct1 enable firewalld; systemct1 restart firewalld command will enable and restart the firewalld service, but it will not change the firewall rules. The firewall-cmd --zone=public -- permanent --add-port=22/udp command will allow UDP traffic on port 22 in the public zone, but SSH uses TCP, not UDP. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 18: Securing Linux Systems, page 543.

NEW QUESTION # 203
Based on an organization's new cybersecurity policies, an administrator has been instructed to ensure that, by default, all new users and groups that are created fall within the specified values below.

To which of the following configuration files will the required changes need to be made?

A. /etc/profile
B. /etc/login.defs
C. /etc/security/limits.conf
D. /etc/default/useradd

Answer: B

Explanation:
The required changes need to be made to the /etc/login.defs configuration file. The /etc/login.defs file defines the default values for user and group IDs, passwords, shells, and other parameters for user and group creation.
The file contains the directives UID_MIN, UID_MAX, GID_MIN, and GID_MAX, which set the minimum and maximum values for automatic user and group ID selection. The administrator can edit this file and change the values to match the organization's new cybersecurity policies. This is the correct file to modify to accomplish the task. The other options are incorrect because they either do not affect the user and group IDs (
/etc/security/limits.conf or /etc/profile) or do not set the default values (/etc/default
/useradd). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 15: Managing Users and Groups, page 463.

NEW QUESTION # 204
A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots. Which of the following commands should be run on the DNS forwarder server to accomplish this task?

A. systemctl reload firewalld
B. flrewall-cmd --zone-public --add-port-53/udp --permanent
C. iptables -A OUTPUT -p udp -ra udp -dport 53 -j ACCEPT
D. ufw allow out dns

Answer: B

NEW QUESTION # 205
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