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CompTIA Linux+ certification exam has been updated to include modern technologies such as cloud computing, containerization, and virtualization. This ensures that candidates are up-to-date with current industry trends and have the skills necessary to work with the latest Linux-based technologies. The updated exam also covers security and compliance requirements, which are crucial in today's cybersecurity landscape.

To prepare for the CompTIA Linux+ certification exam, candidates can use a variety of study resources, including official CompTIA training courses, study guides, practice exams, and hands-on experience with Linux systems. It is recommended that candidates have at least 12 months of hands-on experience with Linux systems before taking the exam.

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CompTIA XK0-005 certification exam is designed for IT professionals seeking to validate their knowledge and skills in Linux administration. CompTIA Linux+ Certification Exam certification exam is the latest iteration of the CompTIA Linux+ certification and is a vendor-neutral certification that is recognized globally. XK0-005 Exam is designed to test the candidate's proficiency in Linux system administration and covers a wide range of topics, including Linux command-line tools, system configuration, security, and troubleshooting.

CompTIA Linux+ Certification Exam Sample Questions (Q617-Q622):

NEW QUESTION # 617
A user is unable to remotely log on to a server using the server name server1 and port 22. The Linux engineer troubleshoots the issue and gathers the following information:

Which of the following is most likely causing the issue?

A. server1 is using an incorrect IP address.
B. sshd is running on a non-standard port.
C. sshd is not an active service.
D. server1 is not in the DNS.

Answer: B

Explanation:
The sshd is the Secure Shell Daemon, which is a service that allows remote login to a Linux system using the SSH protocol. The output shows that the sshd is running on port 2222, which is a non- standard port for SSH. The default port for SSH is 22, which is what the user is trying to use.

NEW QUESTION # 618
A cloud engineer needs to change the secure remote login port from 22 to 49000. Which of the following files should the engineer modify to change the port number to the desired value?

A. /etc/services
B. /etc/ssh/sshd_config
C. /etc/host.conf
D. /etc/hostname

Answer: B

Explanation:
Explanation
The file /etc/ssh/sshd_config contains the configuration settings for the SSH daemon, which handles the secure remote login. To change the port number, the engineer should edit this file and modify the line that says Port
22 to Port 49000. The other files are not related to the SSH service. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 13: Managing Network Services, page 411.

NEW QUESTION # 619
A Linux system is failing to boot with the following error:

Which of the following actions will resolve this issue? (Choose two.)

A. Interrupt the boot process in the GRUB menu and add single to the kernel line.
B. Interrupt the boot process in the GRUB menu and add rescue to the kernel line.
C. Boot the system on a LiveCD/ISO.
D. Fix the partition modifying /etc/default/grub and reboot.
E. Execute grub-install --root-directory=/mnt and reboot.
F. Execute grub-install /dev/sdX and reboot.

Answer: C,F

Explanation:
The administrator should do the following two actions to resolve the issue:
Boot the system on a LiveCD/ISO. This is necessary to access the system and repair the boot loader. A LiveCD/ISO is a bootable media that contains a Linux distribution that can run without installation. The administrator can boot the system from the LiveCD/ISO and mount the root partition of the system to a temporary directory, such as /mnt.
Execute grub-install /dev/sdX and reboot. This will reinstall the GRUB boot loader to the disk device, where sdX is the device name of the disk, such as sda or sdb. The GRUB boot loader is a program that runs when the system is powered on and allows the user to choose which operating system or kernel to boot. The issue is caused by a corrupted or missing GRUB boot loader, which prevents the system from booting. The command grub-install will restore the GRUB boot loader and fix the issue.
The other options are incorrect because they either do not fix the boot loader (interrupt the boot process in the GRUB menu or fix the partition modifying /etc/default/grub) or do not use the correct syntax (grub-install -- root-directory=/mnt instead of grub-install /dev/sdX or rescue or single instead of recovery in the GRUB menu). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 8: Managing the Linux Boot Process, pages 265-266.

NEW QUESTION # 620
A Linux administrator implemented a new HTTP server using the default configuration.
None of the users on the network can access the server. If there is no problem on the network or with the users' workstations, which of the following steps will BEST analyze and resolve the issue?

A. Run route to ensure the port is correctly bound, and configure SELinux to allow access on ports 80 and 443
B. Run route to ensure the port is correctly bound, and configure the firewall to allow access on ports
80 and 443
C. Run netstat to ensure the port is correctly bound, and configure the firewall to allow access on ports
80 and 443
D. Run netcat to ensure the port is correctly bound, and configure a static route to the web to allow access on ports 80 and 443

Answer: C

Explanation:
https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/

NEW QUESTION # 621
A development team asks an engineer to guarantee the persistency of journal log files across system reboots.
Which of the following commands would accomplish this task?

A. grep -i auto /etc/systemd/journald.conf && systemctl restart systemd-journald.service
B. journalctl --list-boots && systemctl restart systemd-journald.service
C. sed -i 's/auto/persistent/g' /etc/systemd/journald.conf && sed -i 'persistent/s/'#//q'
/etc/systemd/journald.conf
D. cat /etc/systemd/journald.conf | awk '(print $1,$3)'

Answer: C

Explanation:
Explanation
The command sed -i 's/auto/persistent/g' /etc/systemd/journald.conf && sed -i 'persistent/s/'#//q'
/etc/systemd/journald.conf will accomplish the task of guaranteeing the persistency of journal log files across system reboots. The sed command is a tool for editing text files on Linux systems. The -i option modifies the file in place.The s command substitutes one string for another. The g flag replaces all occurrences of the string.
The && operator executes the second command only if the first command succeeds. The q command quits after the first match. The /etc/systemd/journald.conf file is a configuration file for the systemd-journald service, which is responsible for collecting and storing log messages. The command sed -i 's/auto/persistent/g'
/etc/systemd/journald.conf will replace the word auto with the word persistent in the file. This will change the value of the Storage option, which controls where the journal log files are stored. The value auto means that the journal log files are stored in the volatile memory and are lost after reboot, while the value persistent means that the journal log files are stored in the persistent storage and are preserved across reboots. The command sed -i 'persistent/s/'#//q' /etc/systemd/journald.conf will remove the # character at the beginning of the line that contains the word persistent. This will uncomment the Storage option and enable it.
The command sed -i 's/auto/persistent/g' /etc/systemd/journald.conf && sed -i 'persistent/s/'#//q'
/etc/systemd/journald.conf will guarantee the persistency of journal log files across system reboots by changing and enabling the Storage option to persistent. This is the correct command to use to accomplish the task. The other options are incorrect because they either do not change the value of the Storage option (grep -i auto /etc/systemd/journald.conf && systemctl restart systemd-journald.service or cat
/etc/systemd/journald.conf | awk '(print $1,$3)') or do not enable the Storage option (journalctl --list-boots && systemctl restart systemd-journald.service). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 16: Managing Logging and Monitoring, page 489.

NEW QUESTION # 622
......

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CompTIA Linux+ Certification Exam Sample Questions (Q617-Q622):

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