CompTIA XK0-004 Exam Dumps have been Updated

dumps2022-02-10T06:15:02+08:00

CompTIA certification XK0-004 exam dumps have been updated. Study the updated XK0-004 exam questions, it will be easy for you to pass the test. Passing CompTIA XK0-004 exam is a required step for you to earn CompTIA Linux+ certification. Free updated CompTIA XK0-004 exam dumps are below.

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1. Given the output below:

[root@appserver ~]# rm config.txt

rm: remove regular file 'config.txt'? yes

rm: cannot remove 'config.txt': Operation not permitted

Which of the following might be the cause?

The file config.txt does not have the user write bit set.

The file config.txt does not exist.

The file config.txt has the immutable attribute set.

The file config.txt has an ACL that does not permit deletion by others.

2. Ann, a user, has created a new directory and noticed that permissions on the new directory are as follows:

drwx------. 1 ann ann 0 Jun 11 08:20 work

Which of the following should the administrator do to restore default permissions for newly created directories?

Change umask value in /etc/profile.

Run chmod command to update permissions.

Modify directory ownership to ann:ann with chown.

Execute chattr command to restore default access.

3. A systems administrator is receiving errors while trying to install a popular virtualization software. The software specifications state the processor needs to support virtualization with Intel instructions. Additional requirements state the processor must accelerate encryption/decryption and use hyperthreading.

Given the following output about the processor:

fpu ume depse tsu msr pae mce cx8 apic sep mtrr pae mca cmov pat pse36 cflusm mmx

fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology

nonstop_tsc pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave

avx rdrand hypervisor lahf_lm fsgsbase

Which of the following is the MOST likely reason for the errors?

The processor supports AMD instructions rather than Intel.

The processor cannot accelerate decryption.

The processor does not support hyperthreading.

The processor is running inside a virtual machine.

4. Users are reporting collaborate.company.com is inaccessible from the user VLAN, but there is no issue connecting to the system’s web page from the DMZ.

Given the following outputs from commands run on the system:

Which of the following explains why users are unable to access the system from the user VLAN, and how can the administrator remediate this issue?

Users cannot access the system because the IP subnet mask is /24. The remediation for this issue is to set the IP subnet mask to /16.

Users cannot access the system because the DNS server has the incorrect IP address. The remediation for this issue is to edit the DNS configuration to point to the correct I

Users cannot access the system because the connectivity port is running on the incorrect I

The remediation for this issue is to edit the configuration file to listen on all interfaces.

Users cannot access the system because the default gateway has the wrong interface. The remediation for this issue is to set the default gateway to the proper interface.

5. 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

6. 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

7. A user creates and installs a Linux VM on a local workstation. The VM can only connect to the local

workstation.

Which of the following BEST represents the default virtual network configuration in this instance?

Host-only

Bridged

NAT

Dual-homed

8. 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

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

lspci

lsmod

lsblk

lsusb

10. Remount /home.

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11. A Linux administrator tries to ping a hostname in a network but receives the message:

hostname not found. The administrator is sure the name exists on the network and wants to verify if the DNS server is correctly configured on the client.

Which of the following files should the administrator use to verify this information?

/etc/named.conf

/etc/resolv.conf

/etc/nsswitch.conf

/etc/network

12. A user is unable to write data to an NFS datastore at /mnt/storage. A df command indicates 50% free inodes.

Which of the following commands should the user attempt NEXT to diagnose the situation?

df -h /mnt/storage

du -sh /mnt

fdisk -l /mnt/storage

df -i /mnt/storage

13. An administrator needs to see the type of CPU that a server is running.

Which of the following files contains this information?

/proc/cpuinfo

/etc/devices/info.conf

/dev/proc/cpu

/sys/dev/cpuinfo

14. A new IO card has been added to the security server to log the opening and closing of the main entrance. A switch is attached, so the interface card returns a 1 when the door is opened and a 0 when the door is closed.

Which of the following describes the Linux device to which this switch is attached?

/dev/tty0

/dev/port

/dev/gpio

/dev/sg0

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

lpr

lpq

lpstat

lspci

16. A user tries to log in to the Linux console and receives the following message:

Your account has expired; Please contact your system administrator.

Which of the following commands was MOST likely run to create this behavior?

passwd

usermod

userdel

chage

17. An administrator wants to know the amount of memory installed on a Linux server.

Which of the following commands can be used to accomplish this task?

cat /sys/proc/meminfo

cat /proc/meminfo

cat /proc/sys/meminfo

cat /sys/meminfo

18. A systems administrator suspects a process with a PID of 2864 is consuming resources at an alarming rate.

The administrator uses the command renice -n -5 -p2864, but it does not solve the issue.

Which of the following commands should the administrator execute to correct the issue?

nice -n 5 -p 2864

nice -n -5 -p 2864

renice -n 10 -p 2864

renice -n -10 -p 2864

19. 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 &

20. A Linux systems administrator is setting up SSH access with PKI for several using their newly created RSA keys.

Which of the following MOST securely achieves this task?

Use curl to copy each user’s public key file to the respective system

Use cp to copy each user’s public key file to the respective system

Use ssh-copy-id to copy each user’s public key file to the respective system

Use ssh-copy-id to copy each user’s private key file to the respective system

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21. DRAG DROP

You have been asked to parse a log file of logins to determine various information about who is logging in and when.

INSTRUCTIONS

Open and inspect the Login log file.

Drag and drop the correct commands onto the output that was generated from that command.

Tokens can be used only once and not all will be used.

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

22. A user needs to modify the IP address of a laptop.

Which of the following files can be used to configure the network interface named eth0?

/etc/sysconfig/network/interfaces.cnf

/system/config/interfaces

/etc/sysconfig/network-scripts/ifcfg-eth0

/system/networking/ifconfig

/etc/interfaces/eth0.conf

23. 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

24. A systems administrator wants to mount an ISO to access its content.

Using /mnt as a mount point, which of the following is the correct syntax?

mount -o iso9660 /dev/sr0 /mnt

mount -o loop -t iso /mnt

mount -o loop /tmp/image.iso /mnt

mount -o loop /dev/kvm /mnt

25. A Linux administrator needs to disable the Sendmail service on a Linux server and prevent it from being started manually and during boot.

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

systemctl reset-failed sendmail

systemctl mask sendmail

systemctl stop sendmail

systemctl disable sendmail

26. 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

27. An administrator is troubleshooting an application that has failed to start after the server was rebooted.

Noticing the data volume is not mounted, the administrator attempts to mount it and receives this error:

Upon checking the logical volume status, the administrator receives this information:

Which of the following can be said about the data logical volume, and how can this problem be resolved?

The logical volume is not active. The administrator should make it active with lvchange - ay /dev/ datavg/datalv and then mount it.

The logical volume file system has become corrupted. The administrator should repair it with xfs_repair/dev/datavg/datalv and then mount it.

The logical volume is OK but the /dev special files are missing. The administrator should recreate them by running /dev/MAKEDE

The file system is read-only. The administrator should remount it as read-write with the command mount - o remount.rw /data.

28. 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

29. A site reliability engineer updated the latest configuration management scripts and committed them to a workstream called either test or patch. A Linux administrator wants to ensure these latest workstreams are able to be retrieved to the server.

Which of the following is the BEST Git attribute to use?

branch

fetch

log

pull

30. The following represents a partial listing of a user’s .bashrc file:

HISTSIZE=800

HISTFILESIZE=1000

umask 2002

HISTCONTROL=ignoreboth

When the user opens a terminal, an error message appears:

Octal number out of range

Which of the following lines in the partial .bashrc should be modified to prevent the error from occurring?

HISTSIZE=800

HISTFILESIZE=1000

umask 2002

HISTCONTROL=ignoreboth

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31. A Linux administrator tried to copy files to a remote server but received an error message indicating a lack of free space on the disk. The administrator issued a df command and verified adequate free space and inodes on the filesystem.

Which of the following commands is the BEST way to diagnose the issue?

cat /proc/meminfo

lsof -nP | grep deleted

find / -type f -size +50M

du -a / | sort -n -r | head -n 30

32. 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>

33. A user cannot write files to the /home/user directory.

The junior Linux administrator runs the following commands:

Which of the following BEST represents why the user cannot write files?

The filesystem is out of inodes.

The filesystem is out of file space.

The filesystem is not configured for the user to write to it.

The filesystem does not have a group write permission.

34. An issue was discovered on a testing branch of a Git repository. A file was inadvertently modified and needs to be reverted to the master branch version.

Which of the following is the BEST option to resolve the issue?

git branch -b master file

git merge master testing

git stash branch master

git checkout master -- file

35. When a technician plugs a USB flash drive into a server, the drive does not mount automatically.

Which of the following commands will provide the information needed to mount the drive manually?

modinfo

lshw

lspci

mount

36. 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

37. A user wants to configure the application “myapp” to start on runlevels 2, 3, 4, and 5 every time the system starts.

Which of the following commands will accomplish this task?

chkconfig --level 2345 myapp on

systemctl myapp on 2345

chkcinfig myapp --levels 2-5

systemctl --levels 2345 on

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

Ouppet

Salt

Ansible

Chef

39. 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

40. 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

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41. A systems administrator is troubleshooting an intermittent network connection at the IP address 192.168.1.23.

The administrator wishes to monitor the connection at five-minute intervals for one hour.

Which of the following commands will accomplish this task?

ping -i 5 192.168.1.23

ping -c 12 192.168.1.23

ping -c 12 -i 300 192.168.1.23

ping -c 60 -i 100 192.168.1.23

42. 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

43. During the final step of staging new Linux hardware, GRUB2 is installed to the system drive.

Which of the following BEST describes the role of GRUB2 in a new Linux installation?

It provides a menu for creating administrator task shortcuts.

It provides a menu for running special shell scripts.

It provides a method to partition a hard drive.

It provides a method to pass parameters to the Linux kernel on startup.

44. Users in the payroll department are not configured to use DNS due to security concerns. The users ask the junior Linux administrator to configure their workstations to access the payroll server at 192.168.204.11 by the name “Payroll”.

Which of the following commands should the administrator issue to meet this request?

echo “nameserver 192.168.204.11 #Payroll” >> /etc/resolv.conf

echo “net.ipv4.ip_dynaddr=192.168.204.11 Payroll” >> /etc/sysctl.conf

echo “192.168.204.11 Payroll” >> /etc/hosts

echo ‘IPADDR=”192.168.204.11” #Payroll’ >> /etc/network/interface

45. An administrator notices a website hosted on an httpd web server is not loading. Upon further inspection, the administrator learns there are no httpd processes running. When starting the service, the site operates correctly for a few minutes before the process disappears again.

Which of the following should the administrator consider as the MOST likely possibility before troubleshooting?

the issue?

The CPU has too much load, causing it to overheat, and the kernel is automatically killing the processes to keep the CPU cool.

An external database to which the web server connects is offline, causing httpd to die due to execution errors.

Shared libraries, which were recently updated, are causing compatibility issues and httpd to die due to version mismatch.

The out-of-memory killer was activated due to low available memory, causing the kernel to kill the processes automatically.

The server is intermittently losing access to the network, causing socket errors that trigger httpd to die.

46. A Linux administrator needs to prevent the Postfix mail transfer agent from starting on boot.

Which of the following commands will accomplish this task?

systemctl stop postfix.service

/etc/init.d/postfix stop

systemctl disable postfix.service

/etc/init.d/postfix disable

47. 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

48. A newly installed desktop is unable to connect to networked resources.

The systems administrator executes various commands and reviews the following output snippets:

Which of the following should the systems administrator try NEXT to restore connectivity?

arp -s 20:ad:1f:ab:10:0f 192.168.1.10

route add -net 192.168.1.0 netmask 255.255.255.0

dig -x @127.0.0.1 192.168.1.10

ip link set wlo1 up

killall -HUP NetworkManager

49. 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

50. 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

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51. 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.

52. 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

53. 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

54. An administrator is using a configuration management tool to define a system’s configuration. The defined configuration can be used to provision new systems, rebuild existing systems, or roll back systems to their original baseline configurations.

Which of the following BEST describes what the administrator is doing?

Build automation

Containerization

Infrastructure as code

Test automation

55. 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

56. 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.

57. An organization wants to consolidate its entire user information in centralized storage using an X.500-based protocol.

Which of the following protocols should be used for this implementation?

RADIUS

LDAP

DNS

DHCP

58. An administrator completed the configuration of the in-addr.arpa zone files for an organization.

Which of the following commands should the administrator use to verify the configuration is working as expected?

ping -n 192.168.1.100

host in-add.arpa

dig -x 192.168.1.100

nslookup in-addr.arpa

tracepath -n 192.168.1.100

59. 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

60. The Apache web server was recently installed on a Debian/Ubuntu server. The web server fails and a review of log messages on another partition reveals the installation was not completed properly due to lack of disk space.

After clearing the files, the systems administrator has requested the installation to be performed again.

Which of the following command lines will perform this task? (Choose two.)

apt-get install apache2

apt-get --purge remove acache2

apt-get --reinstall install apache2

apt-get --reinstall apache2

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61. A Linux administrator retrieved a repository of files from a Git server using git clone. The administrator wants to see if a configuration file was added to the repository.

Which of the following Git arguments should be used to see the recent modifications?

fetch

log

init

pull

62. 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

63. 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

64. A user wants to list the lines of a log, adding a correlative number at the beginning of each

line separated by a set of dashes from the actual message.

Which of the following scripts will complete this task?

A)

Option A

Option B

Option C

Option D

65. A Linux administrator attempts to install the package newprogram.x86_64.rpm using a package manager.

The administrator receives a warning indicating the command that was run was using a deprecated package manager.

Which of the following commands should the administrator use to avoid the warning and install the newprogram.x86_64.rpm program?

# dnf install newprogram.x86_64.rpm

# rpm -e newprogram.x86_64.rpm

# dpkg -i newprogram.x86_64.rpm

# apt-get install newprogram.x86_64.rpm

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

KDE

GNOME

GUI

VNC

X11

SPICE

67. A systems administrator wants to verify the DNS information of a system that is in production.

Which of the following will provide this information?

nmap -R 10.10.20.21 10.10.1.10

whois -r -h 10.10.1.10 10.10.20.21

dig -x 10.10.20.21 @10.10.1.10

route 10.10.20.21 gw 10.10.1.10

68. 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

69. Joe, a user, asks a systems administrator to schedule the daily execution of a custom script.

Which of the following commands will allow the systems administrator to set up Joe’s cron job?

crontab -r -u joe

crontab -e -u joe

crontab -n -u joe

crontab -l -u joe

70. A storage administrator in a virtualized environment has been told by a user that there is no space left on the volume to which the user can write. However, a check reveals that there is 20GB of unused space.

Which of the following explains the discrepancy?

The drive is not formatted

The drive is thin provisioned

The drive is thick provision eager zeroed

The drive space is overallocated

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71. 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

72. An administrator notices a directory on a web server named /var/www/html/old_reports that should no

longer be accessible on the web.

Which of the following commands will accomplish this task?

chmod 000 /var/www/html/old_reports

chgrp root /var/www/html/old_reports

chown apache /var/www/html/old_reports

setenforce apache /var/www/html/old_reports

73. A customer reports a Linux production server is randomly suffering degraded performance.

The administrator verifies that the sysstat package is installed and enabled on the server.

Which of the following would BEST determine what is causing the impact on performance?

Create a cron job that runs uptime every 15 minutes to collect historical data of the load average of the system.

Leave a ping running overnight from a laptop to the server to catch any latency encountered.

Analyze the data in /var/log/sa using the sar command.

Open a screen session and run top inside of it. Let it run over night and collect the data.

74. A Linux administrator has downloaded and installed the httpd package.

Which of the following commands will start the service immediately and allow the service to start on system boot?

systemctl start httpd;chkconfig httpd on

systemctl status httpd;chkconfig httpd on

systemctl.start httpd;chkconfig httpd on

systemctl start httpd;chkconfig httpd on 6

75. 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

76. 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

77. 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.

78. Which of the following server roles utilize a heartbeat/polling process? (Choose two.)

Proxy

Certificate authority

Logging

File server

Cluster

Load balancer

79. 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

80. The development team has automated their software build process so each time a change is submitted to the source code repository, a new software build is compiled. They are requesting that the Linux operations team look into automating the deployment of the software build into the test environment.

Which of the following is the benefit to the development team for implementing deployment automation?

To ensure the build commits are also deployed to the test environment

To enable notifications when builds are deployed to the test environment

To ensure software builds in test are not accidentally deployed to production

To streamline the deployment process for deploying builds into test environments

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81. A technician wants to secure a sensitive workstation by ensuring network traffic is kept within the local subnet.

To accomplish this task, the technician executes the following command:

echo 0 > /proc/sys/net/ipv4/ip_default_ttl

Which of the following commands can the technician use to confirm the expected results? (Choose two.)

tcpdump

traceroute

route

iperf

arp

82. A Linux systems administrator installed a new web server, which failed while attempting to start. The

administrator suspects that SELinux is causing an issue and wants to temporarily put the system into

permissive mode.

Which of the following would allow the administrator to accomplish this?

echo SELINUX=PERMISSIVE >> /etc/sysconfig/selinux

setenforce 0

sestatus 0

chcon httpd_sys_content_t /var/

83. Which of the following can be used to check the status of wireless devices that are connected to the system?

lsusb

iwconfig

netstat

ifconfig

84. A Linux administrator wants to configure log messages of critical or higher severity levels from the cron utility to be logged to the console.

Which of the following will accomplish this objective?

Edit the /etc/logrotate.d/cron file to include the line cron.emerg.* /dev/console

Edit the /etc/rsyslog.conf file to include the line cron.emerg.* /dev/console

Edit the /etc/logrotate.conf file to include the line cron.emerg.* /dev/console

Edit the /etc/rsyslog.d/conf file to include the line cron.emerg.* /dev/console

85. 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

86. A Linux administrator created a new log file in /var/log/newlog to monitor a newly installed application. The administrator is now configuring parameters of the file so it will be rotated on a weekly basis or when it becomes larger than 1MB in size. In addition, five rotations of the file should exist in the /var/log directory.

Which of the following should be added to the /etc/logrotate.conf file to meet this objective?

A)

Option A

Option B

Option C

Option D

87. Which of the following is the MOST common method used to access Windows systems that are running in a cloud provider from a Linux system?

SSH

XRDP

VNC

88. Users are unable to connect to a server using HTTPS.

The administrator runs the following command on the remote system:

Then, the administrator runs the following command from a local workstation:

Which of the following steps should the administrator take to address the issue?

Start the application to run on port 443

Configure the application to run on an active port

Allow port 443 through the firewall

Update the self-signed certificate

89. A Linux administrator is adding a static IP address to a network interface on a Linux system.

The administrator modifies the ifcfg- eth0 configuration file with the following settings:

After the administrator restarts the Linux server, the system is not connected to the network.

Which of the following configuration settings needs to be changed?

Set BOOTPROTO to BOOTP and USERCTL to yes.

Set BOOTPROTO to NONE and ONBOOT to yes.

Set USERCTL to yes and ONBOOT to no.

Set NETMASK to 255.255.0.0 and ONBOOT to yes.

90. A systems administrator is editing a service file for the web server. In order to continue testing, all web server processes must be shut down.

The administrator accomplishes this with the following commands:

Based on the command output above, which of the following BEST explains how this was accomplished?

Killing the parent process with -15 gives it a chance to kill all of the child processes.

The -15 signal will allow the kill command to automatically seek out all child processes and kill them as well.

The -15 signal tells the kill command to kill all processes matching the Apache string.

The -15 signal gracefully kills the process and all Its parent and child processes.

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91. Which of the following is used in unattended server installation via PXE?

Kickstart

YAML

Cloud-init

Container image

CompTIA XK0-004 Exam Dumps have been Updated

CompTIA XK0-004 Exam Dumps have been Updated

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