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1. Which of the following is a function of a bootloader?

2. An administrator would like to list all current containers, regardless of their running state.

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

3. A user generated a pair of private-public keys on a workstation.

Which of the following commands will allow the user to upload the public key to a remote server and enable passwordless login?

4. A systems administrator needs to clone the partition /dev/sdc1 to /dev/sdd1.

Which of the following commands will accomplish this task?

5. Which of the following technologies provides load balancing, encryption, and observability in containerized environments?

6. A newly created container has been unable to start properly, and a Linux administrator is analyzing the cause of the failure.

Which of the following will allow the administrator to determine the FIRST command that is executed inside the container right after it starts?

7. An administrator would like to securely connect to a server and forward port 8080 on a local machine to port 80 on the server.

Which of the following commands should the administrator use to satisfy both requirements?

8. A Linux administrator found many containers in an exited state.

Which of the following commands will allow the administrator to clean up the containers in an exited state?

9. A Linux system is failing to boot with the following error:





Which of the following actions will resolve this issue? (Choose two.)

10. After connecting to a remote host via SSH, an administrator attempts to run an application but receives the following error:

[user@workstation ~]$ ssh admin@srv1

Last login: Tue Mar 29 18:03:34 2022

[admin@srvl ~] $ /usr/local/bin/config_manager

Error: cannot open display:

[admin@srv1 ~] $

Which of the following should the administrator do to resolve this error?

11. A systems administrator made some unapproved changes prior to leaving the company. The newly hired administrator has been tasked with revealing the system to a compliant state.

Which of the following commands will list and remove the correspondent packages?

12. An administrator would like to mirror the website files on the primary web server, www1, to the backup web server, www2.

Which of the following commands should the administrator use to most efficiently accomplish this task?

13. A Linux administrator is configuring a two-node cluster and needs to be able to connect the nodes to each other using SSH keys from the root account.

Which of the following commands will accomplish this task?

14. A systems administrator has been unable to terminate a process.

Which of the following should the administrator use to forcibly stop the process?

15. A User on a Linux workstation needs to remotely start an application on a Linux server and then forward the graphical display of that application back to the Linux workstation.

Which of the following would enable the user to perform this action?

16. A systems administrator received a notification that a system is performing slowly.

When running the top command, the systems administrator can see the following values:





Which of the following commands will the administrator most likely run NEXT?

17. An administrator needs to increase the system priority of a process with PID 2274.

Which of the following commands should the administrator use to accomplish this task?

18. A systems technician is working on deploying several microservices to various RPM-based systems, some of which could run up to two hours.

Which of the following commands will allow the technician to execute those services and continue deploying other microservices within the same terminal section?

19. While troubleshooting server issues, a Linux systems administrator obtains the following output:

[rootGhost ~]# total free -m used free shared buf f/cache available

Mem: 3736 3598 88 2 48 29

Swap: 2047 1824 223

Which of the following best describes the state of the system?

20. A systems engineer is adding a new 1GB XFS filesystem that should be temporarily mounted under /ops/app.

Which of the following is the correct list of commands to achieve this goal?

A)





B)





C)





D)

21. During a security scan, the password of an SSH key file appeared to be too weak and was cracked.

Which of the following commands would allow a user to choose a stronger password and set it on the existing SSH key file?

22. A senior Linux administrator has created several scripts that will be used to install common system applications. These scripts are published to a reposito-ry to share with the systems team. A junior Linux administrator needs to re-trieve the scripts and make them available on a local workstation.

Which of the following Git commands should the junior Linux administrator use to accom-plish this task?

23. A Linux administrator is configuring a new internal web server fleet. The web servers are up and running but can only be reached by users directly via IP address. The administrator is attempting to

fix this inconvenience by requesting appropriate records from the DNS team.

The details are:

Hostname: devel.comptia.org

IP address: 5.5.5.1, 5.5.5.2, 5.5.5.3, 5.5.5.4

Name server: 5.5.5.254

Additional names: dev.comptia.org, development.comptia.org

Which of the following types of DNS records should the Linux administrator request from the DNS team? (Select three).

24. A new Linux systems administrator just generated a pair of SSH keys that should allow connection to the servers.

Which of the following commands can be used to copy a key file to remote servers? (Choose two.)

25. A systems administrator is trying to track down a rogue process that has a TCP listener on a network interface for remote command-and-control instructions.

Which of the following commands should the systems administrator use to generate a list of rogue process names? (Select two).

26. A Linux administrator has physically added a new RAID adapter to a system.

Which of the following commands should the Linux administrator run to confirm that the device has been recognized? (Select TWO).

27. Several users reported that they were unable to write data to the /oracle1 directory.

The following output has been provided:





Which of the following commands should the administrator use to diagnose the issue?

28. The development team wants to prevent a file from being modified by all users in a Linux system, including the root account.

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

29. Users have been unable to reach www.comptia.org from a Linux server.

A systems administrator is troubleshooting the issue and does the following:





Based on the information above, which of the following is causing the issue?

30. A Linux administrator was asked to run a container with the httpd server inside. This container should be exposed at port 443 of a Linux host machine while it internally listens on port 8443.

Which of the following commands will accomplish this task?

31. A systems administrator is configuring a Linux system so the network traffic from the internal network 172.17.0.0/16 going out through the eth0 interface would appear as if it was sent directly from this interface.

Which of the following commands will accomplish this task?

32. A new disk was presented to a server as /dev/ sdd. The systems administrator needs to check if a partition table is on that disk.

Which of the following commands can show this information?

33. Which of the following commands is used to configure the default permissions for new files?

34. An administrator needs to make some changes in the IaC declaration templates.

Which of the following commands would maintain version control?

35. After listing the properties of a system account, a systems administrator wants to remove the expiration date of a user account.

Which of the following commands will accomplish this task?

36. A Linux administrator needs to remove software from the server.

Which of the following RPM options should be used?

37. A Linux administrator is tasked with creating resources using containerization. When deciding how to create this type of deployment, the administrator identifies some key features, including portability, high availability, and scalability in production.

Which of the following should the Linux administrator choose for the new design?

38. After installing a new version of a package, a systems administrator notices a new version of the corresponding, service file was Installed.

In order to use the new version of the, service file, which of the following commands must be Issued FIRST?

39. A Linux administrator needs to analyze a failing application that is running inside a container.

Which of the following commands allows the Linux administrator to enter the running container and analyze the logs that are stored inside?

40. A developer is trying to install an application remotely that requires a graphical interface for installation. The developer requested assistance to set up the necessary environment variables along with X11 forwarding in SSH.

Which of the following environment variables must be set in remote shell in order to launch the graphical interface?

41. Which of the following will prevent non-root SSH access to a Linux server?

42. An administrator deployed a Linux server that is running a web application on port 6379/tcp.

SELinux is in enforcing mode based on organization policies.

The port is open on the firewall.

Users who are trying to connect to a local instance of the web application receive Error 13, Permission denied.

The administrator ran some commands that resulted in the following output:





Which of the following commands should be used to resolve the issue?

43. Joe, a user, is unable to log in to the Linux system.

Given the following output:





Which of the following command would resolve the issue?

44. A systems administrator pressed Ctrl+Z after starting a program using the command line, and the

shell prompt was presented.

In order to go back to the program, which of the following commands can the administrator use?

45. A systems administrator needs to verify whether the built container has the app.go file in its root directory.

Which of the following can the administrator use to verify the root directory has this file?

46. A Linux administrator is troubleshooting the root cause of a high CPU load and average.





Which of the following commands will permanently resolve the issue?

47. A Linux administrator needs to connect securely to a remote server in order to install application software.

Which of the following commands would allow this connection?

48. A cloud engineer wants to delete all unused networks that are not referenced by any container.

Which of the following commands will achieve this goal?

49. A Linux systems administrator is setting up a new web server and getting 404 - NOT FOUND errors while trying to access the web server pages from the browser.

While working on the diagnosis of this issue, the Linux systems administrator executes the following commands:





Which of the following commands will BEST resolve this issue?

50. DRAG DROP

A new drive was recently added to a Linux system.

Using the environment and tokens provided, complete the following tasks:

• Create an appropriate device label.

• Format and create an ext4 file system on the new partition.

The current working directory is /.

51. A Linux engineer finds multiple failed login entries in the security log file for application users. The Linux engineer performs a security audit and discovers a security issue.

Given the following:

# grep -iE '*www*|db' /etc/passwd

www-data:x:502:502:www-data:/var/www:/bin/bash

db:x: 505:505:db: /opt/db:/bin/bash

Which of the following commands would resolve the security issue?

52. A systems administrator is notified that the mysqld process stopped unexpectedly.

The systems administrator issues the following command:

sudo grep Ci -r ‘out of memory’ /var/log

The output of the command shows the following:

kernel: Out of memory: Kill process 9112 (mysqld) score 511 or sacrifice child.

Which of the following commands should the systems administrator execute NEXT to troubleshoot this issue? (Select two).

53. A Linux engineer set up two local DNS servers (10.10.10.10 and 10.10.10.20) and was testing email connectivity to the local mail server using the mail command on a local machine when the following error appeared:





The local machine DNS settings are:





Which of the following commands could the engineer use to query the DNS server to get mail server information?

54. A Linux administrator is trying to remove the ACL from the file /home/user/data. txt but receives the following error message:





Given the following analysis:





Which of the following is causing the error message?

55. A Linux administrator wants to prevent the httpd web service from being started both manually and automatically on a server.

Which of the following should the administrator use to accomplish this task?

56. A Linux systems administrator is configuring a new filesystem that needs the capability to be mounted persistently across reboots.

Which of the following commands will accomplish this task? (Choose two.)

57. Ann, a security administrator, is performing home directory audits on a Linux server. Ann issues the su Joe command and then issues the Is command. The output displays files that reside in Ann's home directory instead of Joe's.

Which of the following represents the command Ann should have issued in order to list Joe's files?

58. A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots.

Which of the following commands should be run on the DNS forwarder server to accomplish this task?

59. A systems administrator is adding a Linux-based server and removing a Windows-based server from a cloud-based environment. The changes need to be validated before they are applied to the cloud-based environment.

Which of the following tools should be used to meet this requirement?

60. A server is experiencing intermittent connection issues. Some connections to the Internet work as intended, but some fail as if there is no connectivity.

The systems administrator inspects the server configuration:





Which of the following is MOST likely the cause of the issue?

61. A systems administrator made some changes in the ~/.bashrc file and added an alias command. When the administrator tried to use the alias command, it did not work.

Which of the following should be executed FIRST?

62. A Linux administrator was notified that a virtual server has an I/O bottleneck.

The Linux administrator analyzes the following output:





Given there is a single CPU in the sever, which of the following is causing the slowness?

63. An administrator transferred a key for SSH authentication to a home directory on a remote server. The key file was moved to .ssh/authorized_keys location in order to establish SSH connection without a password. However, the SSH command still asked for the password.

Given the following output:





Which of the following commands would resolve the issue?

64. An administrator started a long-running process in the foreground that needs to continue without interruption.

Which of the following keystrokes should the administrator use to continue running the process in the background?

65. A systems administrator is tasked with installing GRUB on the legacy MBR of the SATA hard drive.

Which of the following commands will help the administrator accomplish this task?

66. A cloud engineer is asked to copy the file deployment.yaml from a container to the host where the container is running.

Which of the following commands can accomplish this task?

67. A systems administrator is investigating why one of the servers has stopped connecting to the internet.





Which of the following is causing the issue?

68. Which of the following actions are considered good security practices when hardening a Linux server? (Select two).

69. A systems administrator wants to check for running containers.

Which of the following commands can be used to show this information?

70. An administrator thinks that a package was installed using a snap.

Which of the following commands can the administrator use to verify this information?

71. The group owner of the / home/ test directory would like to preserve all group permissions on files

created in the directory.

Which of the following commands should the group owner execute?

72. A Linux administrator created a new file system.

Which of the following files must be updated to ensure the filesystem mounts at boot time?

73. Due to low disk space, a Linux administrator finding and removing all log files that were modified more than 180 days ago.

Which of the following commands will accomplish this task?

74. A cloud engineer needs to remove all dangling images and delete all the images that do not have an associated container.

Which of the following commands will help to accomplish this task?

75. A systems administrator wants to be sure the sudo rules just added to /etc/sudoers are valid.

Which of the following commands can be used for this task?

76. After starting an Apache web server, the administrator receives the following error:

Apr 23 localhost.localdomain httpd 4618] : (98) Address already in use: AH00072: make_sock: could

not bind to address [: :]80

Which of the following commands should the administrator use to further trou-bleshoot this issue?

77. To harden one of the servers, an administrator needs to remove the possibility of remote administrative login via the SSH service.

Which of the following should the administrator do?

78. A systems administrator received a request to change a user's credentials.

Which of the following commands will grant the request?

79. A systems administrator requires that all files that are created by the user named web have read-only permissions by the owner.

Which of the following commands will satisfy this requirement?

80. A user is unable to remotely log on to a server using the server name server1 and port 22.

The Linux engineer troubleshoots the issue and gathers the following information:

Which of the following is most likely causing the issue?

81. A Linux system fails to start and delivers the following error message:





Which of the following commands can be used to address this issue?

82. A Linux administrator is alerted to a storage capacity issue on a server without a specific mount point or directory.

Which of the following commands would be MOST helpful for troubleshooting? (Choose two.)

83. A Linux systems administrator needs to persistently enable IPv4 forwarding in one of the Linux systems.

Which of the following commands can be used together to accomplish this task? (Choose two.)

84. A developer needs to launch an Nginx image container, name it Web001, and ex-pose port 8080

externally while mapping to port 80 inside the container.

Which of the following commands will accomplish this task?

85. When trying to log in remotely to a server, a user receives the following message:





The server administrator is investigating the issue on the server and receives the following outputs:





Which of the following is causing the issue?

86. A systems administrator frequently connects to a remote host via SSH and a non-standard port. The systems administrator would like to avoid passing the port parameter on the command line every time.

Which of the following files can be used to set a different port value for that host?

87. A Linux administrator wants to find out whether files from the wget package have been altered since they were installed.

Which of the following commands will provide the correct information?

88. A database administrator requested the installation of a custom database on one of the servers.

Which of the following should the Linux administrator configure so the requested packages can be installed?