Question1: Which of the following should be used to verify the integrity of a file?
Question2: A Linux administrator is adding a new configuration file to a Git repository. Which of the following describes the correct order of Git commands to accomplish the task successfully?
Question3: A developer has been unable to remove a particular data folder that a team no longer uses. The developer escalated the issue to the systems administrator. The following output was received:
Which of the following commands can be used to resolve this issue?
Question4: 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?
Question5: A cloud engineer needs to launch a container named web-01 in background mode. Which of the following commands will accomplish this task''
Question6: 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 /.
Question7: 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?
Question8: Which of the following can be used as a secure way to access a remote termi-nal?
Question9: A systems administrator wants to check for running containers. Which of the following commands can be used to show this information?
Question10: A systems administrator is tasked with setting up key-based SSH authentication. In which of the following locations should the administrator place the public keys for the server?
Question11: A Linux administrator needs to obtain a list of all volumes that are part of a volume group. Which of the following commands should the administrator use to accomplish this task?
Question12: A systems administrator created a new Docker image called test. After building the image, the administrator forgot to version the release. Which of the following will allow the administrator to assign the v1 version to the image?
Question13: Which of the following will prevent non-root SSH access to a Linux server?
Question14: User1 is a member of the accounting group. Members of this group need to be able to execute but not make changes to a script maintained by User2. The script should not be accessible to other users or groups. Which of the following will give proper access to the script?
Question15: Which of the following will prevent non-root SSH access to a Linux server?
Question16: 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?
Question17: A DevOps engineer wants to allow the same Kubernetes container configurations to be deployed in development, testing, and production environments. A key requirement is that the containers should be configured so that developers do not have to statically configure custom, environment-specific locations.
Which of the following should the engineer use to meet this requirement?
Question18: A systems administrator needs to reconfigure a Linux server to allow persistent IPv4 packet forwarding.
Which of the following commands is the correct way to accomplish this task?
Question19: 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?
Question20: Which of the following directories is the mount point in a UEFI system?
Question21: A new file was added to a main Git repository. An administrator wants to synchronize a local copy with the contents of the main repository. Which of the following commands should the administrator use for this task?
Question22: A systems administrator is installing various software packages using a pack-age manager. Which of the following commands would the administrator use on the Linux server to install the package?
Question23: 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?
Question24: 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?
Question25: 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?
Question26: 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?
Question27: A Linux administrator needs to create a symlink for /usr/local/bin/app-a, which was installed in
/usr/local/share/app-a. Which of the following commands should the administrator use?
Question28: Which of the following is a function of a bootloader?
Question29: 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?
Question30: A Linux systems administrator receives a notification that one of the server's filesystems is full. Which of the following commands would help the administrator to identify this filesystem?
Question31: 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?
Question32: A Linux administrator is reviewing changes to a configuration file that includes the following section:
The Linux administrator is trying to select the appropriate syntax formatter to correct any issues with the configuration file. Which of the following should the syntax formatter support to meet this goal?
Question33: Users are reporting that writes on a system configured with SSD drives have been taking longer than expected, but reads do not seem to be affected. A Linux systems administrator is investigating this issue and working on a solution. Which of the following should the administrator do to help solve the issue?
Question34: An administrator has source code and needs to rebuild a kernel module. Which of the following command sequences is most commonly used to rebuild this type of module?
Question35: A systems administrator is tasked with changing the default shell of a system account in order to disable iterative logins. Which of the following is the best option for the administrator to use as the new shell?
Question36: A developer reported an incident involving the application configuration file /etc/httpd/conf/httpd.conf that is missing from the server. Which of the following identifies the RPM package that installed the configuration file?
Question37: A file called testfile has both uppercase and lowercase letters:
$ cat testfile
ABCDEfgH
IJKLmnoPQ
abcdefgH
ijklLMNopq
A Linux administrator is tasked with converting testfile into all uppercase and writing it to a new file with the name uppercase. Which of the following commands will achieve this task?
Question38: 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?
Question39: The administrator comptia is not able to perform privileged functions on a newly deployed system. Given the following command outputs:
Which of the following is the reason that the administrator is unable to perform the assigned duties?
Question40: Which of the following data structures is written in JSON?
Question41: A Linux administrator is troubleshooting a memory-related issue. Based on the output of the commands:
Which of the following commands would address the issue?
Question42: An administrator thinks that a package was installed using a snap. Which of the following commands can the administrator use to verify this information?
Question43: 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?
Question44: 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?
Question45: A Linux administrator is providing a new Nginx image from the registry to local cache. Which of the following commands would allow this to happen?
Question46: A systems administrator wants to back up the directory /data and all its contents to /backup/data on a remote server named remote. Which of the following commands will achieve the desired effect?
Question47: 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?
Question48: One leg of an LVM-mirrored volume failed due to the underlying physical volume, and a systems administrator is troubleshooting the issue. The following output has been provided:
Given this scenario, which of the following should the administrator do to recover this volume?
Question49: A Linux administrator is creating a new sudo profile for the accounting user. Which of the following should be added by the administrator to the sudo configuration file so that the accounting user can run / opt/ acc/ report as root?
Question50: Users have been unable to save documents to /home/tmp/temp and have been receiving the following error:
Path not found
A junior technician checks the locations and sees that /home/tmp/tempa was accidentally created instead of
/home/tmp/temp. Which of the following commands should the technician use to fix this issue?
Question51: 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?
Question52: 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?
Question53: Users in the human resources department are trying to access files in a newly created directory. Which of the following commands will allow the users access to the files?
Question54: An administrator recently updated the BIND software package and would like to review the default configuration that shipped with this version. Which of the following files should the administrator review?
Question55: 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?
Question56: A systems administrator is investigating an issue in which one of the servers is not booting up properly. The journalctl entries show the following:
Which of the following will allow the administrator to boot the Linux system to normal mode quickly?
Question57: Users report that connections to a MariaDB service are being closed unexpectedly. A systems administrator troubleshoots the issue and finds the following message in /var/log/messages:
Which of the following is causing the connection issue?
Question58: A Linux administrator needs to ensure that Java 7 and Java 8 are both locally available for developers to use when deploying containers. Currently only Java 8 is available. Which of the following commands should the administrator run to ensure both versions are available?
Question59: An administrator added the port 2222 for the SSH server on myhost and restarted the SSH server. The administrator noticed issues during the startup of the service. Given the following outputs:
Which of the following commands will fix the issue?
Question60: Which of the following tools is BEST suited to orchestrate a large number of containers across many different servers?
Question61: 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?
Question62: A Linux administrator created the directory /project/access2all. By creating this directory, the administrator is trying to avoid the deletion or modification of files from non-owners. Which of the following will accomplish this goal?
Question63: A Linux administrator copied a Git repository locally, created a feature branch, and committed some changes to the feature branch. Which of the following Git actions should the Linux administrator use to publish the changes to the main branch of the remote repository?
Question64: A systems administrator is compiling a report containing information about processes that are listening on the network ports of a Linux server. Which of the following commands will allow the administrator to obtain the needed information?
Question65: A Linux administrator needs to resolve a service that has failed to start. The administrator runs the following command:
The following output is returned
Which of the following is MOST likely the issue?
Question66: An administrator recently updated the BIND software package and would like to review the default configuration that shipped with this version. Which of the following files should the administrator review?
Question67: An administrator attempts to connect to a remote server by running the following command:
$ nmap 192.168.10.36
Starting Nmap 7.60 ( https://nmap.org ) at 2022-03-29 20:20 UTC
Nmap scan report for www1 (192.168.10.36)
Host is up (0.000091s latency).
Not shown: 979 closed ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp filtered ssh
631/tcp open ipp
Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds
Which of the following can be said about the remote server?
Question68: A systems administrator detected corruption in the /data filesystem. Given the following output:
Which of the following commands can the administrator use to best address this issue?
Question69: A Linux administrator wants to set the SUID of a file named dev_team.text with 744 access rights. Which of the following commands will achieve this goal?
Question70: A systems administrator is troubleshooting a connectivity issue pertaining to access to a system named db.example.com. The system IP address should be 192.168.20.88. The administrator issues the dig command and receives the following output:
The administrator runs grep db.example.com /etc/hosts and receives the following output:
Given this scenario, which of the following should the administrator do to address this issue?
Question71: A systems administrator has been tasked with disabling the nginx service from the environment to prevent it from being automatically and manually started. Which of the following commands will accomplish this task?
Question72: An administrator needs to get network information from a group of statically assigned workstations before they are reconnected to the network. Which of the following should the administrator use to obtain this information?
Question73: A systems administrator created a web server for the company and is required to add a tag for the API so end users can connect. Which of the following would the administrator do to complete this requirement?
Question74: A Linux systems administrator receives reports from various users that an application hosted on a server has stopped responding at similar times for several days in a row. The administrator logs in to the system and obtains the following output:
Output 1:
Output 2:
Output 3:
Which of the following should the administrator do to provide the BEST solution for the reported issue?
Question75: What is the main objective when using Application Control?
Question76: 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?
Question77: The development team created a new branch with code changes that a Linux administrator needs to pull from the remote repository. When the administrator looks for the branch in Git, the branch in question is not visible.
Which of the following commands should the Linux administrator run to refresh the branch information?
Question78: A Linux administrator would like to use systemd to schedule a job to run every two hours. The administrator creates timer and service definitions and restarts the server to load these new configurations. After the restart, the administrator checks the log file and notices that the job is only running daily. Which of the following is MOST likely causing the issue?
Question79: An application developer received a file with the following content:
##This is a sample Image ##
FROM ubuntu:18.04
MAINTAINER [email protected]
COPY . /app
RUN make /app
CMD python /app/app.py
RUN apt-get update
RUN apt-get install -y nginx
CMD ["echo","Image created"]
The developer must use this information to create a test bed environment and identify the image (myimage) as the first version for testing a new application before moving it to production. Which of the following commands will accomplish this task?
Question80: Rugged appliances are small appliances with ruggedized hardware and like Quantum Spark appliance they use which operating system?
Question81: A DevOps engineer needs to download a Git repository from https://git.company.com/admin/project.git.
Which of the following commands will achieve this goal?
Question82: A systems administrator needs to check if the service systemd-resolved.service is running without any errors.
Which of the following commands will show this information?
Question83: Using AD Query, the security gateway connections to the Active Directory Domain Controllers using what protocol?
Question84: A systems administrator notices the process list on a mission-critical server has a large number of processes that are in state "Z" and marked as "defunct." Which of the following should the administrator do in an attempt to safely remove these entries from the process list?
Question85: An administrator created an initial Git repository and uploaded the first files. The administrator sees the following when listing the repository:
The administrator notices the file . DS STORE should not be included and deletes it from the online repository. Which of the following should the administrator run from the root of the local repository before the next commit to ensure the file is not uploaded again in future commits?
Question86: 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?
Question87: A junior administrator updated the PostgreSQL service unit file per the data-base administrator's recommendation. The service has been restarted, but changes have not been applied. Which of the following should the administrator run for the changes to take effect?
Question88: 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?
Question89: In which of the following filesystems are system logs commonly stored?
Question90: 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?
Question91: 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?
Question92: A Linux administrator modified the SSH configuration file. Which of the following commands should be used to apply the configuration changes?
Question93: A junior developer is unable to access an application server and receives the following output:
The systems administrator investigates the issue and receives the following output:
Which of the following commands will help unlock the account?
Question94: A Linux administrator is scheduling a system job that runs a script to check available disk space every hour.
The Linux administrator does not want users to be able to start the job. Given the following:
The Linux administrator attempts to start the timer service but receives the following error message:
Which of the following is MOST likely the reason the timer will not start?
Question95: 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?
Question96: A user reported issues when trying to log in to a Linux server. The following outputs were received:
Given the outputs above. which of the following is the reason the user is una-ble to log in to the server?
Question97: A Linux administrator recently downloaded a software package that is currently in a compressed file. Which of the following commands will extract the files?
Question98: A systems administrator is tasked with creating an Ansible playbook to automate the installation of patches on several Linux systems. In which of the following languages should the playbook be written?
Question99: 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?
Question100: A Linux administrator provisioned a new web server with custom administrative permissions for certain users.
The administrator receives a report that user1 is unable to restart the Apache web service on this server. The administrator reviews the following output:
[ root@server ] # id user1
UID=1011 (user1) gid=1011 (USER1) groups=1011 (user1), 101 (www-data), 1120 (webadmin)
[ root@server ] # cat /etc/sudoers.d/custom.conf
user1 ALL=/usr/sbin/systemctl start httpd, /usr/sbin/systemctl stop httpd webadmin ALL=NOPASSWD: /etc/init.d.httpd restart, /sbin/service httpd restart, /usr/sbin/apache2ctl restart
#%wheel ALL=(ALL) NOPASSWD: ALL
Which of the following would most likely resolve the issue while maintaining a least privilege security model?
Question101: A Linux administrator reviews a set of log output files and needs to identify files that contain any occurrence of the word denied. All log files containing entries in uppercase or lowercase letters should be included in the list. Which of the following commands should the administrator use to accomplish this task?
Question102: A cloud engineer needs to change the secure remote login port from 22 to 49000. Which of the following files should the engineer modify to change the port number to the desired value?
Question103: A systems administrator is gathering information about a file type and the contents of a file. Which of the following commands should the administrator use to accomplish this task?
Question104: 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?
Question105: 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?
Question106: A Linux user reported the following error after trying to connect to the system remotely:
ssh: connect to host 10.0.1.10 port 22: Resource temporarily unavailable The Linux systems administrator executed the following commands in the Linux system while trying to diagnose this issue:
Which of the following commands will resolve this issue?
Question107: 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?
Question108: A systems administrator was tasked with assigning the temporary IP address/netmask
192.168.168.1/255.255.255.255 to the interface eth0 of a Linux server.
When adding the address, the following error appears:
# ip address add 192.168.168.1/33 dev eth0
Error: any valid prefix is expected rather than "192.168.168.1/33".
Based on the command and its output above, which of the following is the cause of the issue?
Question109: A DevOps engineer is working on a local copy of a Git repository. The engineer would like to switch from the main branch to the staging branch but notices the staging branch does not exist. Which of the following Git commands should the engineer use to perform this task?
Question110: A Linux administrator needs to create a new cloud.cpio archive containing all the files from the current directory. Which of the following commands can help to accomplish this task?
Question111: 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?
Question112: A systems administrator creates a public key for authentication. Which of the following tools is most suitable to use when uploading the key to the remote servers?
Question113: An administrator installed an application from source into /opt/operations1/ and has received numerous reports that users are not able to access the application without having to use the full path /opt/operations1/bin/*.
Which of the following commands should be used to resolve this issue?
Question114: 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?
Question115: Application code is stored in Git. Due to security concerns, the DevOps engineer does not want to keep a sensitive configuration file, app . conf, in the repository. Which of the following should the engineer do to prevent the file from being uploaded to the repository?
Question116: An engineer needs to insert a character at the end of the current line in the vi text editor. Which of the following will allow the engineer to complete this task?
Question117: 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?
Question118: As part of the requirements for installing a new application, the swappiness parameter needs to be changed to
O. This change needs to persist across re-boots and be applied immediately. A Linux systems administrator is performing this change. Which of the following steps should the administrator complete to accomplish this task?
Question119: A junior systems administrator has just generated public and private authentication keys for passwordless login. Which of the following files will be moved to the remote servers?
Question120: 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?
Question121: A systems administrator is troubleshooting connectivity issues and trying to find out why a Linux server is not able to reach other servers on the same subnet it is connected to. When listing link parameters, the following is presented:
Based on the output above, which of following is the MOST probable cause of the issue?
Question122: 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?
Question123: Users are unable to create new files on the company's FTP server, and an administrator is troubleshooting the issue. The administrator runs the following commands:
Which of the following is the cause of the issue based on the output above?
Question124: A Linux administrator needs to expand a volume group using a new disk. Which of the following options presents the correct sequence of commands to accomplish the task?
Question125: A systems administrator created a new directory with specific permissions. Given the following output:
# file: comptia
# owner: root
# group: root
user: : rwx
group :: r-x
other: :---
default:user :: rwx
default:group :: r-x
default:group:wheel: rwx
default:mask :: rwx
default:other ::-
Which of the following permissions are enforced on /comptia?
Question126: 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?
Question127: Which of the following is the best tool for dynamic tuning of kernel parameters?
Question128: 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 event commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Question129: A Linux administrator was tasked with deleting all files and directories with names that are contained in the sobelete.txt file. Which of the following commands will accomplish this task?