Updated CompTIA Linux+ XK0-004 Exam Dumps - Pass XK0-004 Exam On The First Attempt

Updated CompTIA Linux+ XK0-004 Exam Dumps – Pass XK0-004 Exam On The First Attempt

Eleanor2022-08-08T09:17:47+00:00

To all, we have updated the CompTIA Linux+ XK0-004 exam dumps with the latest exam questions and answers, which will help you gain confidence on passing the XK0-004 CompTIA Linux+ certification exam on the first attempt. By using the CompTIA Linux+ XK0-004 exam questions and answers, you will be practicing them that align with the final CompTIA Linux+ XK0-004 exam. We will offer a 3-month free update so you can always get the latest XK0-004 exam dumps questions and answers for practice.

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1. An administrator needs to see a list of the system user’s encrypted passwords.

Which of the following Linux files does the administrator need to read?

/etc/shadow

/etc/skel

/etc/passwd

/etc/pw

2. Which of the following is the template for the grub.cfg file?

/etc/default/grub

/etc/grub2.cfg

/etc/sysct1.conf

/boot/efi

3. A Linux administrator needs to switch from text mode to GUI.

Which of the following runlevels will start the GUI by default?

Runlevel 3

Runlevel 4

Runlevel 5

Runlevel 6

4. A junior Linux administrator is installing a new application with CPU architecture requirements that have the following specifications:

- x64 bit

- 3.0GHz speed

- Minimum quad core

The administrator wants to leverage existing equipment but is unsure whether the requirements of these systems are adequate. The administrator issues the following command cat/proc/cpuinfo.

The output of the command is as follows:

Which of the following is the recommended course of action the administrator should take based on this output?

Install the application, as the system meets the application requirements

Procure new equipment that matches the recommended specifications

Recompile the Linux kernel to support the installation.

Reconfigure lib modules to support the new application.

5. A networked has been crashing intermittently. A Linux administrator would like to write a shell script that will attempt to ping the server and email an alert if the server fails to respond. The script will later be scheduled via cron job.

Which of the following scripts would BEST accomplish this task?

Option A

Option B

Option C

Option D

6. A Linux systems administrator needs to set permissions on an application with the following parameters:

The owner of the application should be able to read, write, and execute the application.

Members of the group should be able to read and execute the application.

Everyone else should not have access to the application.

Which of the following commands would BEST accomplish these tasks?

chmod 710 <application name>

chmod 730 <application name>

chmod 750 <application name>

chmod 760 <application name>

7. An administrator is tasked with increasing the size of the volume /dev/vg/lv to 20GB.

Which of the following BEST illustrates the steps the administrator should take?

vgextend CL20G /dev/vg/lv; resizelv /dev/vg/lv

parted CL20G /dev/vg/lv; remount /dev/vg/lv

mkfs CL20G /dev/vg/lv; tune2fs /dev/vg/lv

lvextend CL20G /dev/vg/lv; resize2fs /dev/vg/lv

8. After starting a long-running script, a systems administrator needs to verify the frequency of what is filling up the /var partition and kill it because it is consuming too much space.

Which of the following is the correct sequence given only a terminal is available?

1. CTRL-C2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-Z

1. CTRL-C2. fg3. watch df /var4. CTRL-Z5. bg6. CTRL-Z

1. CTRL-Z2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-C

1. CTRL-Z2. bg3. watch df /var4. CTRL-Z5. fg6. CTRL-C

9. Which of the following are Linux desktop managers? (Choose two.)

KDE

GNOME

GUI

VNC

X11

SPICE

10. A Linux administrator needs to take stock of USB devices attached to the system.

Which of the following commands would be BEST to complete this task?

lspci

lsusb

cat /proc/USB

modprobe -Cusb

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11. Joe, a user, is unable to log in to the server and contracts the systems administrator to look into the issue.

The administrator examines the /etc/passwd file and discovers the following entry:

joe:x:505:505::/home/joe:/bin/false

Which of the following commands should the administrator execute to resolve the problem?

usermod Cs /bin/bash joe

passwd Cu joe

useradd Cs /bin/bash joe

chage CE -1 joe

12. A Linux administrator is using a public cloud provider to host servers for a company’s website. Using the provider’s tools, the administrator wrote a JSON file to define how to deploy the servers.

Which of the following techniques did the administrator use?

Infrastructure as code

Build automation

Platform as a service

Automated configuration

13. While creating a file on a volume, the Linux administrator receives the following message: No space left on device. Running the df Cm command, the administrator notes there is still 50% of usage left.

Which of the following is the NEXT step the administrator should take to analyze the issue without losing data?

Run the df Ci command and notice the inode exhaustion

Run the df Ch command and notice the space exhaustion

Run the df CB command and notice the block size

Run the df Ck command and notice the storage exhaustion

14. A systems administrator needs to retrieve specific fields from a csv file.

Which of the following tools would accomplish this task?

awk

sort

echo

15. An administrator needs to change the IP address on a server remotely. After updating the configuration files, a network restart is needed. However, the administrator fears that when the network connection drops, the network restart script will be killed before the new IP address has been set.

Which of the following commands would prevent the script from being killed?

nohup service network restart

service network restart &

echo “service network restart” | at now

dg service network restart

16. An administrator notices that a long-running script, /home/user/script.sh, is taking up a large number of system resources. The administrator does not know the script’s function.

Which of the following commands should the administrator use to minimize the script’s impact on system resources?

renice

kill

nohup

17. A Linux storage administrator wants to create a logical volume group.

Which of the following commands is required to start the process?

pvcreate

vgcreate

lvcreate

mkfs.xfs

18. A technical support engineer receives a ticket from a user who is trying to create a 1KB file in the /tmp directory and is getting the following error No space left on device. The support engineer checks the /tmp directory, and it has 20GB of free space.

Which of the following BEST describes a possible cause for this error?

The /tmp directory is not mounted.

The filesystem is formatted with a 4MB block size.

the filesystem ran out of inodes.

The /tmp directory has been set with an immutable attribute.

19. An administrator needs to mount the shared NFS file system testhost:/testvolume to mount point /mnt/testvol and make the mount persistent after reboot.

Which of the following BEST demonstrates the commands necessary to accomplish this task?

A)

Option A

Option B

Option C

Option D

20. A systems administrator wants to deploy several applications to the same server quickly. Each application should be abstracted from the host with its own dependencies and libraries and utilize a minimal footprint.

Which of the following would be BEST in this scenario?

Virtual machines

Type 2 hypervisor

Chroot jails

Containers

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21. An operator finds a user is having issues with opening certain files.

Which of the following commands would allow the security administrator to list and check the SELinux context?

ls CD

ls Ca

ls CZ

ls -1

22. Which of the following statements BEST represents what the term “agentless” means regarding orchestration?

Installation of a tool is not required on the remote system to perform orchestration tasks

It facilitates version control when using infrastructure as code during orchestration

It automatically removes malware from the remote system during orchestration

A tool can only be accessed remotely to perform orchestration tasks

23. A Linux administrator wants to obtain a list of files and subdirectories in the /etc directory that contain the word “services”. Once the files and subdirectories are discovered, they should be listed alphabetically in the /var/tmp/foundservices file.

Which of the following shell scripts will accomplish this task?

#/bin/bashfind /etc Cname services | sort > /var/tmp/foundservices

#/bin/bashlocate /etc Csort Cname services > /var/tmp/foundservices

#/bin/bashfind Cname services Csort </var/tmp/foundservices

#/bin/bashfind /etc Cname services Csort > /var/tmp/foundservices

24. An administrator is attempting to block SSH connections to 192.168.10.24 using the Linux firewall. After implementing a rule, a connection refused error is displayed when attempting to SSH to 192.168.10.24.

Which of the following rules was MOST likely implemented?

iptables CA Cp tcp Cd 192.168.10.24 Cdropt 22 Cj REJECT

iptables CA Cp tcp Cd 192.168.10.24 Cdropt 22 Cj DROP

iptables CA Cp tcp Cd 192.168.10.24 Cdropt 22 Cj FORWARD

iptables CA Cp tcp Cd 192.168.10.24 Cdropt 22 Cj REFUSE

25. A new HTTPS web service is being deployed on a server.

Which of the following commands should the Linux administrator use to ensure traffic is able to flow through the system firewall to the new service?

iptables CI OUTPUT Cp tcp --sport 443 Cj ACCEPT

iptables CA INPUT Cp tcp --dport 443 Cj ACCEPT

iptables CI INPUT --dport 443 Cj ACCEPT

iptables CA OUTPUT Cp tcp --dport 443 Cj ACCEPT

26. 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?

Run netstat to ensure the port is correctly bound, and configure the firewall to allow access on ports 80 and 443

Run route to ensure the port is correctly bound, and configure the firewall to allow access on ports 80 and 443

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

Run route to ensure the port is correctly bound, and configure SELinux to allow access on ports 80 and 443

27. A junior systems administrator is upgrading a package that was installed on a Red Hat-based system.

The administrator is tasked with the following:

Update and install the new package.

Verify the new package version is installed.

Which of the following should be done to BEST accomplish these task? (Choose two.)

yum install <package name>

yum upgrade

rpm Ce <package name>

rpm Cqa

apt-get <package name>

apt-get upgrade

28. A systems administrator must clean up all application files in the directory /var/log/app. However, the company’s security policy requires the files to be kept on the backup server for one year. The Linux server has only the tar and bzip2 packages installed.

Which of the following commands will package and compress the files?

tar Czcvf applicationfiles.tar.bz2 /var/log/app/*

tar Cjcvf applicationfiles.tar.bz2 /var/log/app/*

tar Ccvf applicationfiles.tar.bz2 /var/log/app/*

tar Cxvf applicationfiles.tar.bz2 /var/log/app/*

29. A user attempts to use the mount -a command but gets the following error:

mount: mount point /mnt/test does not exist

Which of the following commands best describes the action the Linux administrator should take NEXT?

mount Ca /mnt/test

mkdir Cp /mnt/test

mdadm Cp /mnt/test

mkfs /mnt/test

touch /mnt/test

30. A systems administrator has received reports of intermittent network connectivity to a particular website.

Which of the following is the BEST command to use to characterize the location and type of failure over the course of several minutes?

mtr www.comptia.org

tracert www.comptia.org

ping www.comptia.org

netstat www.comptia.org

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31. A junior Linux administrator is setting up system-wide configuration settings.

The goal is to ensure the PATH environment variable includes the following locations for all users who log into a Linux system.

The administrator issues the following commands at the terminal:

Respectively, the output of these commands is as follows:

Given this output, which of the following would be the BEST action for the administrator to perform to address this issue?

Update the /etc/profile.d file using a text editor, navigate to the PATH element add the missing locations, and run the bash_completion.sh script to update the changes.

Update the /etc/profile file using a text editor, navigate to the PATH element, add the missing locations and run the . /etc/profile command to update the changes.

Update the /etc/profile.d file using a text editor, navigate to the PATH element, add the missing locations, and reboot to update the changes.

Update the /etc/profile file using a text editor navigate to the PATH element, add the missing locations, and restart the bash process to update the changes.

32. A Linux administrator needs every new file created on a directory to maintain the group permissions of the same directory.

Which of the following commands would satisfy this requirement?

chmod o+s <directory>

chmod u+s <directory>

chmod +s <directory>

chmod g+s <directory>

33. A systems administrator needs to install a new piece of hardware that requires a new driver. The driver should be manually installed.

Which of the following describes the order of commands required to obtain module information, install the module, and check the log for any errors during module installation?

lsmod, modprobe, modinfo

modinfo, insmod, modprobe

modinfo, insmod, dmesg

lsmod, insmod, dmesg

34. A systems administration team has decided to their systems as immutable instances. They keep the desired state of each of their systems in version control and apply automation whenever they provision a new instance. If there is an issue with one of their servers, instead of troubleshooting the issue they terminate the instance and rebuild it using automation.

Which of the following is this an example of?

Inventory

Orchestration

Infrastructure as code

Agentless deployment

35. A Linux system is running normally when the systems administrator receives an alert that one application spawned many processes. The application is consuming a lot of memory, and it will soon cause the machine to become unresponsive.

Which of the following commands will stop each application process?

kill ‘pidof application’

killall application

kill -9 ‘ps Caux | grep application’

pkill -9 application

36. In order to comply with new security policies, an administrator needs to prevent the SSH server from using insecure algorithms.

Which of the following files should be edited to accomplish this?

/etc/ssh/sshd_config

/etc/ssh/ssh_config

~/.ssh/ssh_config

/etc/ssh/known_hosts

37. An administrator receives a warning about a file system filling up, and then identifies a large file located at /tmp/largelogfile. The administrator deletes the file, but no space is recovered on the file system.

Which of the following commands would BEST assists the administrator in identifying the problem?

lsof | grep largelogfile

pkill /tmp/largelogfile

pgrep largelogfile

ps Cef | grep largelogfile

38. An administrator reviews the following configuration file provided by a DevOps engineer:

Which of the following would the application parsing this file MOST likely have to support?

YAML

AJAX

JSON

SOAP

39. Which of the following BEST describes the purpose of the X11 system?

X11 provides graphical display capabilities

X11 provides command line capabilities

X11 provides networking capabilities

X11 provides telephony capabilities.

40. A new corporate policy states that Bluetooth should be disabled on all company laptops.

Which of the following commands would disable the use of Bluetooth?

echo “blacklist bluetooth” > /etc/modprobe.d/blacklist-bluetooth

echo “kill bluetooth” > /etc/modprobe.d/kill-bluetooth

echo “modprobe bluetooth” > /etc/modprobe.d/modprbe-bluetooth

echo “rmod bluetooth” > /etc/modprobe.d/rmmod-bluetooth

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41. A systems administrator needs to append output of ls Clha /opt command to the contents of a test.txt file.

Which of the following commands will accomplish this?

ls Clha /opt > test.txt

ls Clha /opt < test.txt

ls Clha /opt >> test.txt

ls Clha /opt << test.txt

42. A systems administrator is enabling quotas on the /home directory of a Linux server. The administrator makes the appropriate edits to the /etc/fstab file and attempts to issue the commands to enable quotas on the desired directory. However, the administrator receives an error message stating the filesystem does not support quotas.

Which of the following commands should the administrator perform to proceed?

mount Co remount /home

quotacheck -cg

edquota /home

quotaon /home

43. Which of the following is the BEST reason for not storing database files in the /var directory?

The /var filesystem is not fast enough for database files.

The number of files in /var is limited by the available inodes.

Files in /var do not have strict file permissions.

If log files fill up /var, it might corrupt the database.

44. A user has connected a Bluetooth mouse to a computer, but it is not working properly.

Which of the following commands should the systems administrator use to fix the issue?

lsmod Ci bluetooth

insmod bluetooth

modprobe Cr bluetooth

depmod Ci bluetooth

45. Ann, a junior systems administrator, is required to add a line to the /etc/yum.conf file.

However, she receives the following error message when she tries to add the line:

Ann performs some diagnostics to attempt to find the root cause:

Which of the following commands should Ann execute to write content to /etc/yum?

chmod 755 /etc/yum.conf

setfacl Cm m:rw /etc/yum.conf

chattr CI /etc/yum.conf

setenforce 0

46. A system administrator has deployed a Linux server based on an Anaconda process with all packages and custom configurations necessary to install a web server role.

Which of the following could be used to install more Linux servers with the same characteristics?

/etc/sysconfig/anaconda/cfg

/root/anaconda.auto

/root/anaconda-ks.cfg

/etc/sysconfig/installation.cfg

47. An administrator has modified the configuration file for a service. The service is still running but is not using the new configured values.

Which of the following will BEST remediate this issue?

kill -HUP

init 0

service start

renice -10

48. Given the output below:

Which of the following commands can be used to remove MyPhoto.jpg from the current directory?

unlink ./MyPhoto.jpg

del Pictures/photo.jpg

rm Crf ./Pictures

rm Cf MyPhoto.jpg

ln Crm ./Pictures/photo.jpg

49. An administrator needs to create a shared directory in which all users are able, write, and execute its content but none of the regular users are able to delete any content.

Which of the following permissions should be applied to this shared directory?

rwxrwxrwt

rwxrwxrws

rwxrwxrwx

rwxrwxrw*

50. A systems administrator configured a new kernel module, but it stopped working after reboot.

Which of the following will allow the systems administrator to check for module problems during server startup?

lsmod

modprobe

modinfo

dmesg

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51. A Linux server needs to be accessed, but the root password is not available.

Which of the following would BEST allow an administrator to regain access and set a new known password at the same time?

Boot into a single-user mode and reset the password via the passwd command.

Boot into a single-user mode and reset the password by editing the /etc/passwd file.

Boot into a single-user mode and reset the password by editing the /etc/shadow file.

Boot into a single-user mode and reset the password via the chage command.

52. Which of the following commands would show the default printer on a Linux system?

lpr

lpq

lpstat

lspci

53. A Linux administrator must identify a user with high disk usage.

The administrator runs the # du Cs /home/* command and gets the following output:

Based on the output, User3 has the largest amount of disk space used. To clean up the file space, the administrator needs to find out more information about the specific files that are using the most disk space.

Which of the following commands will accomplish this task?

df Ck /home/User/files.txt

du Ca /home/User3/*

du Csh /home/User/

find . Cname /home/User3 -print

54. Which of the following configuration files should be modified to disable Ctrl-Alt-Del in Linux?

/etc/inittab

~/.bash_profile

/etc/securetty

/etc/security/limits.conf

55. A Linux administrator has configured a Linux system to be used as a router. The administrator confirms that two network adapters are properly installed and functioning correctly. In addition, the output of the iptables CL command appears to contain a complete firewall configuration.

Which of the following commands does the administrator need to issue for the router to be fully functional?

echo “1” > /proc/sys/net/ipv4/ip_forward

echo “0” > /proc/sys/net/ipv4/tcp_abort_on_overflow

echo “0” > /proc/sys/net/ipv4/max_connections

echo “1” > /proc/sys/net/ipv4/ip_default_ttl

56. 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?

OWASP

VDI

VMDK

OVA

57. A Linux administrator needs to remotely update the contents of the www.comptia.org/contacts URL.

Which of the following commands would allow the administrator to download the current contents of the URL before updating?

curl www.comptia.org/contacts

dig www.comptia.org/contacts

apt-get www.comptia.org/contacts

yum list www.comptia.org/contacts

58. A junior Linux administrator is trying to verify connectivity to the remote host host1 and display round-trip statistics for ten ICMP.

Which of the following commands should the administrator execute?

ping Cc 10 host1

traceroute Cc 10 host1

netstat host1

pathping Cc 10 host1

59. An administrator is analyzing a Linux server which was recently hacked.

Which of the following will the administrator use to find all unsuccessful login attempts?

nsswitch

faillock

pam_tally2

passwd

60. Which of the following will provide a list of all flash, external, internal, and SSD drives?

lspci

lsmod

lsblk

lsusb

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61. A systems administrator wants to know the current status of a series of dd jobs that were started in the background three hours ago.

Which of the following commands will achieve this task?

sudo killall CHUP dd

sudo killall dd

sudo killall CTERM dd

sudo killall -USR1 dd

62. Which of the following is the purpose of the monitoring server role?

To aggregate web traffic to watch which websites employees are visiting

To collect status and performance information about the servers in an environment

To provide user authentication services to a network

To provide real-time analysis of potential threats to the organization

63. A Linux administrator opens a ticket to have an external hard drive mounted. As a security policy, external storage kernel modules are disabled.

Which of the following is the BEST command for adding the proper kernel module to enable external storage modules?

rmmod /lib/modules/3.6.12-100-generic/kernel/drivers/usb/storage/usb-storage.ko

modinfo /lib/modules/3.6.12-100-generic/kernel/drivers/usb/storage/usb-storage.ko

depmod /lib/modules/3.6.12-100-generic/kernel/drivers/usb/storage/usb-storage.ko

insmod /lib/modules/3.6.12-100-generic/kernel/drivers/usb/storage/usb-storage.ko

64. A Linux administrator needs to back up the folder /usr/domain, and the output must be a gzip compressed tar.

Which of the following commands should be used?

tar Ccv domain.tar.gz /usr/domain

tar Ccvf /usr/domain domain.tar.gz

tar Cczvf domain.tar.gz /usr/domain

tar Ccxzv /usr/domain domain.tar.gz

65. A Linux administrator is setting up a testing environment and needs to connect to a separate testing server using the production server name. The administrator needs to override the hostname that the DNS is returning in order to use the test environment.

Which of the following commands should be run on each of the testing systems to BEST meet this goal?

# hostnamectl set-hostname “192.168.1.100 production.company.com”

# grep Ci IP “${ip addr show} production.company.com” > /etc/resolv.conf

# ip addr add 192.168.1.100/24 dev eth0 && rndc reload production.company.com

# echo “192.168.1.100 production.company.com” >> /etc/hosts

66. A system administrator has set up third-party log aggregation agents across several cloud instances. The systems administrator wants to create a dashboard of failed SSH attempts and the usernames used.

Which of the following files should be watched by the agents?

/var/log/audit/audit.log

/var/log/kern.log

/var/log/monitor

/etc/rsyslog.conf

67. A junior systems is configuring localization option environment variables.

The administrator is given a checklist of tasks with the following requirements:

View current settings of the LC_ALL environment variable only.

Modify the LANG environment variable to US English Unicode.

Given this scenario, which of the following should be performed to meet these requirements? (Choose two.)

echo $LC_ALL

locale

cat $LC_ALL

export LANG = en_U

UTF-8

export $LANG = en_U

UTF

stty

68. CORRECT TEXT

A 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 commands.

If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

CentOS Command Prompt

69. Which of the following BEST describes running on a Linux system?

Containers only need the namespaces functionally to run on a Linux system available since kernel 2.6.

Containers need a hypervisor to run a Linux system. Cgroups namespaces are functionalities used for the kernel but not for running containers.

Containers only need the cgroups functionality for running on a Linux system. Namespaces is not a Linux kernel functionality needed for creating and managing containers.

Containers use the cgroups and namespaces functionalities to isolate processes and assign hardware resources to each of those isolated processes.

70. A systems administrator has finished building a new feature for the monitoring software in a separate Git branch.

Which of the following is the BEST method for adding the new feature to the software’s master branch?

Merge the changes from the feature branch to the master branch.

Save the changes to the master branch automatically with each Git commit.

Clone the feature branch into the master branch.

Pull the changes from the feature branch into the master branch.

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71. Which of the following can be used to boot a DVD from a remote device to initialize a Linux system setup on bare metal hardware as if it is a local DVD?

UEFI

PXE

NFS

GRUB

72. A junior administrator of a physical server receives log messages indicating the out-of-memory killer has been active. All memory slots are in use on the motherboard, but additional disk space is available. Space has been allocated for a swap file.

Which of the following should the administrator use to reduce the output of memory messages?

free: swapoff / swapfile ; swapon -a

mkswap /swapfile; swapon Ca

fallocate Cl 2G /swapfile && swapon Ca

echo “1” > /proc/meninfo ; swapon / swapfile

73. Which of the following server roles would assign a host IP address?

DHCP

NTP

DNS

SSH

74. A junior Linux administrator is installing patches using YUM.

The administrator issues the following command:

yum list installed

The output of the command is as follows:

Given this scenario and the output, which of the following should the administrator do to address this issue?

renice Cn 9 Cp 5180

killall yum

ps Cef | grep yum

top | grep yum

75. Which of the following is modified to reconfigure the boot environment?

grub-mkconfig

grub.cfg

update-grub

grub2-mkconfig

76. A Linux systems administrator wants the ability to access systems remotely over SSH using RSA authentication.

To which of the following files should the RSA token be added to allow this access?

authorized_keys

~/.ssh/ssh_config

id_rsa.pub

known_hosts

77. A Linux administrator built a GitLab server. Later that day, a software engineer tried to access the server to upload the repository during the final step of installation. The software engineer could not access the website.

Which of the following firewall rules would allow access to this site?

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate NEW, ESTABLISHED Cj ACCEPT

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate ESTABLISHED Cj ACCEPT

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate RELATED, ESTABLISHED Cj ACCEPT

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate NEW, ESTABLISHED Cj REJECT

78. Two specific users need access to a directory owned by root where backups are located.

Which of the following commands would BEST ensure the specified users can access the backup files?

umask

chcon

chmod

setfacl

79. 0.0.1 localhost

Which of the following actions should the administrator perform to accomplish this task?

Modify the /etc/hosts file, and add the ipv6 localhost entry to the file.

Modify the /etc/hosts file, and add the ::1 localhost entry to the file.

Modify the /etc/hosts file, and add the ipv4 localhost entry to the file.

Modify the /etc/hosts file, and add the 0.0.0.0 localhost entry to the file.

80. A Linux systems administrator needs to copy the contents of a directory named “working” on the local working system to a folder /var/www/html on a server named “corporate-web”.

Which of the following commands will allow the administrator to copy all the contents to the web server?

scp Cr working/* webuser@corporate-web:/var/www/html

tar working/* webuser@corporate-web:/var/www/html

cp Cr working/* webuser@corporate-web:/var/www/html

mv working webuser@corporate-web:/var/www/html

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81. A Linux systems administrator needs to provision multiple web servers into separate regional datacenters. The systems architect has instructed the administrator to define the server infrastructure using a specific tool that consumes a text-based file.

Which of the following is the BEST reason to do this?

To document the infrastructure so it can be included in the system security plan

To ensure the administrator follows the planning phase of the system development life cycle

To define the infrastructure so it can be provisioned consistently with minimal manual tasks

To validate user requirements have been met within each regional datacenter for compliance

82. A systems administrator is configuring options on a newly installed Linux VM that will be deployed to the Pacific time zone.

Which of the following sets of commands should the administrator execute to accurately configure the correct time settings?

cd /etcln Cs /usr/share/zoneinfo/US/Pacific localtime

cd /usr/localln Cs /usr/share/zoneinfo/US/Pacific zoneinfo

cd /etc/localln Cs /usr/share/zoneinfo/US/Pacific localtime

cd /usr/share/localln Cs /usr/share/zoneinfo/US/Pacific localectl

83. A Linux administrator is testing a new web application on a local laptop and consistently shows the following 403 errors in the laptop’s logs”

The web server starts properly, but an error is generated in the audit log.

Which of the following settings should be enabled to prevent this audit message?

httpd_can_network_connect = 1

httpd_enable_scripting = 1

httpd_enable_homedirs = 1

httpd_enable_cgi = 1

84. A Linux administrator wants to fetch a Git repository from a remote Git server.

Which of the following is the BEST command to perform this task?

git checkout

git clone

git merge

git config

85. A Linux administration is using a Linux system as a router. During the tests, the administrator discovers that IP packets are not being sent between the configured interfaces.

Which of the following commands enables this feature for IPv4 networks?

cat /proc/sys/net/ipv4/ip_route > 1

echo “1” > /proc/sys/net/ipv4/ip_forward

echo “1” > /proc/sys/net/ipv4/ip_route

echo “1” > /proc/sys/net/ipv4/ip_net

86. A company wants to ensure that all newly created files can be modified only by their owners and that all new directory content can be changed only by the creator of the directory.

Which of the following commands will help achieve this task?

umask 0022

umask 0012

chmod CR 0644 /

chmod CR 0755 /

87. 1.Which of the following would be the BEST solution for a systems administrator to access the graphical user environment of a Linux machine remotely?

VNC

KDE

X11

RPC

88. A junior Linux administrator is optimizing a system in which an application needs to take priority 0 when running the process.

The administrator runs the ps command and receives the following output:

Given this scenario, which of the following steps will address this issue?

Issue the command ronice Cn 0 Cp 8481

Issue the command renice Cp 8481

Issue the command renice Cp 0 ~n 8481

Issue the command renice Cn 8481

89. A Linux server has multiple IPs. A Linux administrator needs to verify if the HTTP server port is bound to the correct IP.

Which of the following commands would BEST accomplish this task?

route

host

nslookup

netstat

90. Which of the following configuration management tools is considered agentless?

Ouppet

Salt

Ansible

Chef

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91. Given that a company’s policy states that users cannot install third-party tools on Window servers, which of the following protocols will allow a Linux GUI to connect to a Windows server?

VNC

RDP

X11

92. A Linux administrator needs the “tech” account to have the option to run elevated commands as root.

Which of the following commands would BEST meet this goal?

$ su C tech Cc “/bin/bash”

# usermod CaG wheel tech

# sudo CI tech

# groupadd Cu tech Cg root

93. A junior administrator needs to unload an older video kernel module.

Which of the following commands would BEST accomplish this task?

modprobe

insmod

rmmod

chmod

94. Which of the following is a difference between YAML and JSON?

Users can comment in YAML but not in JSON

JSON only curly brackets, while YAML only uses square brackets

JSON is used in web development, while YAML is used solely in back-end systems.

YAML has been deprecated for JSO

95. Which of the following is the purpose of the vmlinux file on a Linux system?

To prevent a Linux kernel panic

To start a Linux virtual machine

To provide the executable kernel for the system

To enable resource access to the network

96. A systems administrator observes high latency values when reaching a remote web server.

Which of the following commands will help determine and isolate issues on the network side?

mtr

dig

netstat

route

97. A Linux administrator is testing connectivity to a remote host on a shared terminal. The administrator wants to allow other users to access the terminal while the command is executing.

Which of the following commands should the administrator use?

bg ping remotehost

fg ping remotehost

ping remotehost < results

ping remotehost &

98. Ann, a junior Linux administrator, needs to copy software from her local machine to assist in developing a software application on a remote machine with the IP address 192.168.3.22. The file needs to be placed on the /tmp directory. After downloading the RPM to the local machine, which of the following commands would be BEST to use to copy the software?

scp ~/software.rpm [email protected]:/tmp

scp ~/software.rpm [email protected]: /tmp

wget [email protected]:/tmp -f ~/software.rpm

scp [email protected] ~/software.rpm :/tmp

99. A server is almost out of free memory and is becoming unresponsive.

Which of the following sets of commands will BEST mitigate the issue?

free, fack, partprobe

lsof, lvcreate, mdadm

df, du, rmmod

fdisk, mkswap, swapon -a

100. DRAG DROP

The lead Linux has added a disk, /dev/sdd, to a VM that is running out of disk space.

Place the following steps in the correct order from first (1) to last (4) to add the disk to the existing LVM.

Updated CompTIA Linux+ XK0-004 Exam Dumps – Pass XK0-004 Exam On The First Attempt