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CompTIA XK0-005 exam covers a wide range of topics, including system configuration, command line interface, scripting, networking, security, and troubleshooting. XK0-005 exam format consists of 90 multiple-choice and performance-based questions that need to be completed within 90 minutes. XK0-005 exam is designed to test the practical skills of candidates and assess their ability to solve real-world problems.
NEW QUESTION # 84
A systems administrator wants to upgrade /bin/ someapp to a new version, but the administrator does not know the package name. Which of the following will show the RPM package name that provides that binary file?
- A. rpm -i / bin/ someapp
- B. rpm - P / bin/ some app
- C. rpm -qf /bin/ someapp
- D. rpm -Vv / bin/ someapp
Answer: C
Explanation:
The rpm command is used to manage RPM packages on Linux systems. The -qf option queries the package name that provides a given file. Therefore, the command rpm -qf /bin/someapp will show the RPM package name that provides the binary file /bin/someapp. The statements B, C, and D are incorrect because they do not query the package name, but rather verify, remove, or install a package. References: [How to Use RPM Command in Linux with Examples]
NEW QUESTION # 85
An administrator needs to change the DNS domain search order of a single Linux host to localize it better. Which of the following files should the administrator edit?
- A. /etc/resolv.conf
- B. /etc/hosts
- C. /etc/dhcpd.conf
- D. /etc/nsswitch.conf
Answer: D
Explanation:
Linux Changing DNS Search Order
Under Linux you need to use /etc/nsswitch.conf file which is used by system databases and Name Service Switch configuration file.
Open /etc/nsswitch.conf file using text editor:
# vi /etc/nsswitch.conf
Look for hosts:
hosts: files dns mdns4
Set above order as per your requirement. Close and save the file.
NEW QUESTION # 86
An administrator would like to securely connect to a server and forward port 8080 on a local machine to port 80 on the server. Which of the following commands should the administrator use to satisfy both requirements?
- A. ssh -R 8080:localhost:80 admin@server
- B. ssh -R 80:localhost:8080 admin@server
- C. ssh -L 8080:localhost:80 admin@server
- D. ssh -L 80:localhost:8080 admin@server
Answer: C
Explanation:
This command will create a local port forwarding, which means that connections from the SSH client are forwarded via the SSH server, then to a destination server. In this case, the destination server is the same as the SSH server (localhost), and the destination port is 80. The SSH client will listen on port 8080 on the local machine, and any connection to that port will be forwarded to port 80 on the server. This way, the administrator can securely access the web service running on port 80 on the server by using http://localhost:8080 on the local machine.
NEW QUESTION # 87
A systems administrator wants to disable the isofsmodule on the server.
Which of the following will allow the administrator to check if the isofsmodule is currently in use?
- A. insmod
- B. rmmod
- C. modprobe
- D. lsmod
Answer: D
Explanation:
https://linuxize.com/post/lsmod-command-in-linux/
The lsmod command shows a list of the currently loaded kernel modules
https://linuxize.com/post/modprobe-command-in-linux/
The modprobe command allows you to add and remove Linux kernel modules
NEW QUESTION # 88
A Linux administrator is creating a primary partition on the replacement hard drive for an application server.
Which of the following commands should the administrator issue to verify the device name of this partition?
- A. sudo fdisk -s /dev/sda
- B. sudo fdisk -h
- C. sudo fdisk -l
- D. sudo fdisk /dev/sda
Answer: C
Explanation:
Explanation
The command sudo fdisk -l should be issued to verify the device name of the partition. The sudo command allows the administrator to run commands as the superuser or another user. The fdisk command is a tool for manipulating disk partitions on Linux systems. The -l option lists the partitions on all disks or a specific disk.
The command sudo fdisk -l will show the device names, sizes, types, and other information of the partitions on all disks. The administrator can identify the device name of the partition by looking at the output. This is the correct command to use to accomplish the task. The other options are incorrect because they either do not list the partitions (sudo fdisk /dev/sda or sudo fdisk -h) or do not exist (sudo fdisk -s
/dev/sda). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Storage, page 317.
NEW QUESTION # 89
A Linux administrator copied a Git repository locally, created a feature branch, and committed some changes to the feature branch. Which of the following Git actions should the Linux administrator use to publish the changes to the main branch of the remote repository?
- A. rebase
- B. tag
- C. push
- D. commit
Answer: C
Explanation:
The push action is used to publish the changes made in a local branch to a remote branch of a Git repository.
This action will update the remote branch with the commits made in the local branch and synchronize the two branches. The rebase action is used to reapply commits from one branch onto another branch, creating a linear history of commits. This action does not publish any changes to a remote repository. The tag action is used to create an annotated reference to a specific commit in a Git repository. This action does not publish any changes to a remote repository. The commit action is used to record changes made in the local repository and create a new snapshot of the project state. This action does not publish any changes to a remote repository. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 20: Writing and Executing Bash Shell Scripts, page 579.
NEW QUESTION # 90
A Linux system fails to start and delivers the following error message:
Which of the following commands can be used to address this issue?
- A. mkfs.ext4 /dev/sda1
- B. partprobe /dev/sda1
- C. fsck.ext4 /dev/sda1
- D. fdisk /dev/sda1
Answer: C
Explanation:
The command fsck.ext4 /dev/sda1 can be used to address the issue. The issue is caused by a corrupted filesystem on the /dev/sda1 partition. The error message shows that the filesystem type is ext4 and the superblock is invalid. The command fsck.ext4 is a tool for checking and repairing ext4 filesystems. The command will scan the partition for errors and attempt to fix them. This command can resolve the issue and allow the system to start. The other options are incorrect because they either do not fix the filesystem (partprobe or fdisk) or destroy the data on the partition (mkfs.ext4). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Storage, page 325.
NEW QUESTION # 91
Junior system administrator had trouble installing and running an Apache web server on a Linux server. You have been tasked with installing the Apache web server on the Linux server and resolving the issue that prevented the junior administrator from running Apache.
INSTRUCTIONS
Install Apache and start the service. Verify that the Apache service is running with the defaults.
Typing "help" in the terminal will show a list of relevant event commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
See the explanation below
Explanation:
yum install httpd
systemctl --now enable httpd
systemctl status httpd
netstat -tunlp | grep 80
pkill <processname>
systemctl restart httpd
systemctl status httpd
NEW QUESTION # 92
A Linux administrator rebooted a server. Users then reported some of their files were missing. After doing some troubleshooting, the administrator found one of the filesystems was missing. The filesystem was not listed in /etc/f stab and might have been mounted manually by someone prior to reboot. Which of the following would prevent this issue from reoccurring in the future?
- A. Sync the mount units.
- B. Mount the filesystem manually.
- C. Remount all the missing filesystems
- D. Create a mount unit and enable it to be started at boot.
Answer: D
Explanation:
Explanation
The best way to prevent this issue from reoccurring in the future is to create a mount unit and enable it to be started at boot. A mount unit is a systemd unit that defines how and where a filesystem should be mounted. By creating a mount unit for the missing filesystem and enabling it with systemctl enable, the administrator can ensure that the filesystem will be automatically mounted at boot time, regardless of whether it is listed in
/etc/fstab or not. Syncing the mount units will not prevent the issue, as it will only synchronize the state of existing mount units with /etc/fstab, not create new ones. Mounting the filesystem manually will not prevent the issue, as it will only mount the filesystem temporarily, not permanently. Remounting all the missing filesystems will not prevent the issue, as it will only mount the filesystems until the next reboot, not after. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 14: Managing Disk Storage, page 457.
NEW QUESTION # 93
Junior system administrator had trouble installing and running an Apache web server on a Linux server. You have been tasked with installing the Apache web server on the Linux server and resolving the issue that prevented the junior administrator from running Apache.
INSTRUCTIONS
Install Apache and start the service. Verify that the Apache service is running with the defaults.
Typing "help" in the terminal will show a list of relevant event commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
See the explanation below.
Explanation:
yum install httpd
systemct1 --now enable httpd
systemct1 status httpd
netstat -tunlp | grep 80
pkill <processname>
systemct1 restart httpd
systemct1 status httpd
NEW QUESTION # 94
A systems administrator was tasked with assigning the temporary IP address/netmask
192.168.168.1/255.255.255.255 to the interface eth0 of a Linux server.
When adding the address, the following error appears:
# ip address add 192.168.168.1/33 dev eth0
Error: any valid prefix is expected rather than "192.168.168.1/33".
Based on the command and its output above, which of the following is the cause of the issue?
- A. The IP address 192.168.168.1 is already in use.
- B. There is no route to 192.168.168.1/33.
- C. The interface eth0 does not exist.
- D. The CIDR value /33 should be /32 instead.
Answer: D
Explanation:
The cause of the issue is that the CIDR value /33 is invalid for an IPv4 address. The CIDR value represents the number of bits in the network prefix of an IP address, and it can range from 0 to 32 for IPv4 addresses. A CIDR value of /33 would imply a network prefix of more than 32 bits, which is impossible for an IPv4 address. To assign a temporary IP address/netmask of
192.168.168.1/255.255.255.255 to eth0, the CIDR value should be /32 instead, which means a network prefix of 32 bits and a host prefix of 0 bits. There is no route to 192.168.168.1/33 is not the cause of the issue, as the ip address add command does not check the routing table. The interface eth0 does not exist is not the cause of the issue, as the ip address add command would display a different error message if the interface does not exist. The IP address 192.168.168.1 is already in use is not the cause of the issue, as the ip address add command would display a different error message if the IP address is already in use.
NEW QUESTION # 95
A Linux administrator was notified that a virtual server has an I/O bottleneck. The Linux administrator analyzes the following output:
Given there is a single CPU in the sever, which of the following is causing the slowness?
- A. The memory is exhausted.
- B. The CPU is overloaded.
- C. The processes are paging.
- D. The system is running out of swap space.
Answer: B
Explanation:
The slowness is caused by the CPU being overloaded. The iostat command shows that the CPU utilization is 100%, which means that there are more processes competing for CPU time than the CPU can handle. The other options are incorrect because:
The system is not running out of swap space, as shown by the iostat command, which shows that there is no swap activity (si and so columns are zero).
The memory is not exhausted, as shown by the free -m command, which shows that there is still available memory (avail column) and free buffer/cache memory (buff/cache column).
The processes are not paging, as shown by the vmstat command, which shows that there are no major page faults (majflt column) and no swap activity (si and so columns). Reference: CompTIA Linux+ Study Guide, Fourth Edition, page 417-419, 424-425.
NEW QUESTION # 96
A junior administrator is migrating a virtual machine from a Type 1 hypervisor to a Type 2 hypervisor.
To ensure portability, which of the following formats should the administrator export from the Type
1 hypervisor to ensure compatibility?
- A. OWASP
- B. VMDK
- C. OVA
- D. VDI
Answer: C
Explanation:
OVF is not only the name of the packaging format standard, but it also refers to the package when distributed as a group of files. An OVA (open virtual appliance or application) is merely a single file distribution of the same file package, stored in the TAR format but is CORRECT.
NEW QUESTION # 97
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. systemctl enable firewalld; systemctl restart firewalld
- B. firewall-cmd --zone=public --permanent --add-service=22
- C. firewall-cmd --zone=public --permanent --add-service=ssh
- D. firewall-cmd --zone=public --permanent --add-port=22/udp
Answer: C
Explanation:
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 systemctl enable firewalld; systemctl 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 # 98
A Linux administrator is troubleshooting an issue in which an application service failed to start on a Linux server. The administrator runs a few commands and gets the following outputs:
Based on the above outputs, which of the following is the MOST likely action the administrator should take to resolve this issue?
- A. Enable the logsearch.service and restart the service.
- B. Update the OnCalendar configuration to schedule the start of the logsearch.service.
- C. Increase the TimeoutStartUSec configuration for the logsearch.sevice.
- D. Update the KillSignal configuration for the logsearch.service to use TERM.
Answer: C
Explanation:
The administrator should increase the TimeoutStartUSec configuration for the logsearch.service to resolve the issue. The output of systemct1 status logsearch.service shows that the service failed to start due to a timeout.
The output of cat /etc/systemd/system/logsearch.service shows that the service has a TimeoutStartUSec configuration of 10 seconds, which might be too short for the service to start. The administrator should increase this value to a higher number, such as 30 seconds or 1 minute, and then restart the service. The other options are incorrect because they are not related to the issue. The service is already enabled, as shown by the output of systemct1 is-enabled logsearch.service. The service does not use an OnCalendar configuration, as it is not a timer unit. The service does not use a KillSignal configuration, as it is not being killed by a signal. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 14: Managing Processes and Scheduling Tasks, pages 434-435.
NEW QUESTION # 99
A systems administrator created a new Docker image called test. After building the image, the administrator forgot to version the release. Which of the following will allow the administrator to assign the v1 version to the image?
- A. docker image tag test test:vl
- B. docker image build test:vl
- C. docker image save test test:v1
- D. docker image version test:v1
Answer: A
Explanation:
The docker image tag test test:v1 command can be used to assign the v1 version to the image called test. This command creates a new tag for the existing image, without changing the original image. The docker image save test test:v1 command would save the image to a file, not assign a version. The docker image build test:vl command is invalid, as vl is not a valid version number. The docker image version test:v1 command does not exist. References: [CompTIA Linux+ (XK0-005) Certification Study Guide], Chapter 16: Virtualization and Cloud Technologies, page 500.
NEW QUESTION # 100
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