Updated CompTIA Linux+ XK0-004 Exam Dumps – Download XK0-004 PDF File For Learning

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?

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?

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?

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?

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?

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?

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?

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?

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

10. Remount /home.

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?

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?

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

Which of the following files contains this information?

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?

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

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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

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?

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?

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?

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

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

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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

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

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?

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?

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?

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?

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?

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.)

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?

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

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?

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)

B)

C)

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?

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

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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

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?

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?