XK0-004 Preguntas de examen actualizadas [2022]-Comptia Linux+ Examen de certificación XK0-004 fácilmente

1. 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?

2. 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?

3. 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?

4. 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?

5. 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?

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

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

8. 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?

9. 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?

10. 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?

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

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

13. 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?

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

15. 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?

16. 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)





B)





C)





D)

17. 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?

18. 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?

19. 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.

20. 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?

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

22. 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?

23. 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?

24. 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?

25. 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?

26. 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

27. 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?

28. 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?

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

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

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

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

31. 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?

32. 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?

33. 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?

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

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

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

36. 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?

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

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?

39. 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?

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

41. 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?

42. 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?

43. 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?

44. 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?

45. 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?

46. 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?

47. 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?

48. 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?

49. 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.)

50. 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?

51. 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?

52. 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?

53. 0.0.1 localhost

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

54. 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?

55. 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?

56. 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?

57. 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?

58. 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?

59. 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?

60. 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?

61. 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?

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

Which of the following commands would BEST accomplish this task?

63. 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?

64. 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?

65. 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?

66. 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?

67. 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?

68. 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?

69. 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?

70. 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?

71. 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?

72. 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?

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

74. 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?

75. 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?

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

Which of the following tools would accomplish this task?

77. 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?

78. 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?

79. 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?

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

81. 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?

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

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

84. 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?

85. 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?

86. 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?

87. 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?

88. 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?

89. 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?

90. 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?

91. 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?

92. 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?

93. 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?

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

95. 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?

96. 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?

97. 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?

98. Given the output below:





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

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

100. 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.)