EMT Practice Test

1. Question Content...

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Question1: 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?

Question2: A Linux administrator is troubleshooting SSH connection issues from one of the workstations.
When users attempt to log in from the workstation to a server with the IP address 104.21.75.76, they receive the following message:

The administrator reviews the information below:


Which of the following is causing the connectivity issue?

Question3: 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?

Question4: 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?

Question5: An administrator is trying to diagnose a performance issue and is reviewing the following output:

System Properties:
CPU: 4 vCPU
Memory: 40GB
Disk maximum IOPS: 690
Disk maximum throughput: 44Mbps | 44000Kbps
Based on the above output, which of the following BEST describes the root cause?

Question6: A technician just fixed a few issues in some code and is ready to deploy the code into production. Which of the following steps should the technician take next?

Question7: An administrator needs to make an application change via a script that must be run only in console mode. Which of the following best represents the sequence the administrator should execute to accomplish this task?

Question8: 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?

Question9: An administrator attempts to rename a file on a server but receives the following error.

The administrator then runs a few commands and obtains the following output:

Which of the following commands should the administrator run NEXT to allow the file to be renamed by any user?

Question10: 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?

Question11: A systems administrator receives the following errors via email from the system log:
go
XFS (loop0): Metadata CRC error detected at xfs_agi_read_verify+0xcb/0xfe XFS (loop0): First 128 bytes of corrupted metadata buffer XFS (loop0): metadata I/O error in "xfs_trans_read_buf_map" at daddr 0x2 len 1 error 74 A few minutes later, the administrator starts receiving reports that some of the images in the company's website are not loading properly. The systems administrator runs some commands and receives the following outputs:
css
Output 1
NAME FSTYPE UUID MOUNTPOINT
sda ext4 02ae47-fe457-45bc /
sdb xfs 347c7056 /var/www/html
Output 2
DocumentRoot "/var/www/html"
Output 3
httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled) Active: active (running) since Sun 1991-05-24 16:12:43 UTC; 30y ago Main PID: 252 (httpd) Which of the following would be the appropriate steps to take to solve this issue?

Question12: 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?

Question13: A systems administrator receives reports that several virtual machines in a host are responding slower than expected. Upon further investigation, the administrator obtains the following output from one of the affected systems:

Which of the following best explains the reported issue?

Question14: In which of the following filesystems are system logs commonly stored?

Question15: 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?

Question16: A Linux engineer needs to download a ZIP file and wants to set the nice of value to -10 for this new process. Which of the following commands will help to accomplish the task?

Question17: 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?

Question18: A Linux administrator needs to correct the permissions of a log file on the server. Which of the following commands should be used to set filename.log permissions to -rwxr-r--. ?

Question19: Joe, a user, is unable to log in to the system. The Linux administrator checks the /etc/passwd file and reviews the following output:
Joe:x:1002:1002::/home/Joe:/sbin/nologin
Which of the following should the administrator do to fix this issue?

Question20: A systems administrator configured firewall rules using firewalld. However, after the system is rebooted, the firewall rules are not present:

The systems administrator makes additional checks:

Which of the following is the reason the firewall rules are not active?

Question21: A security team discovers that a web server has been running with elevated privileges and identifies it as a security violation. Which of the following items needs to be added to the webserver.service file to remediate the issue?

Question22: A Linux administrator needs to check extended permissions applied to the directory test. Which of the following commands should the administrator use to help with this task?

Question23: 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?

Question24: A systems administrator received a request to change a user's credentials. Which of the following commands will grant the request?

Question25: A Linux administrator logs in to a system and identifies that an important backup has been started. The backup process is consuming a considerable amount of CPU time but needs to continue. Which of the following should the administrator use to reduce the impact this process has on other services?

Question26: A systems administrator wants to check for running containers. Which of the following commands can be used to show this information?

Question27: 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?

Question28: A Linux administrator needs to list the packages that are currently installed on a server. Which of the following commands should the administrator use?

Question29: 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?

Question30: 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?

Question31: 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?

Question32: A Linux engineer wants to give read-write-execute permissions for the cloud_users directory to user Oliver. Which of the following commands should the engineer use?

Question33: An administrator changed the default port of an SSH server to 2222 on myhost, and clients are not able to connect. The administrator runs some commands and receives the following output:
vbnet
Copy code
$ ssh -p 2222 myhost
ssh:connect to host myhost on port 2222: No route to host
Which of the following commands should be run on myhost?

Question34: A Linux administrator is enabling root log-in over SSH on a server. Which of the following combinations of files and parameters should the administrator modify to accomplish this task?

Question35: Users are reporting that a production application has slow performance. A systems administrator logs in to the server and performs some basic checks. Given the following:
yaml
[root@comptia]# ps -o pcpu; pidstat 1
Average: UID PID %usr %system %wait %CPU Command
Average: 0 937242 32.39 0 63.21 32.39 app_prd
Average: 0 937245 44.97 0.31 51.57 45.28 app_prd
Average: 0 937244 23.62 0 63.55 28.62 app_prd
[root@comptia]# vmstat 1
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy id wa st
16 0 978912 376320 50804 10296312 0 0 0 44 5503 2962 98 2 0 0 0
[root@comptia]# free -m
total used free shared buff/cache available
Mem: 15533 5063 365 164 10104 9975
Swap: 7931 955 6976
Which of the following is causing the performance issue?

Question36: 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?

Question37: A Linux administrator deployed a large-scale application service as a containerized pod. The Linux administrator needs to continually send the application's log file to the company's central log store. Which of the following should the Linux administrator do to efficiently perform this task?

Question38: A systems administrator wants to test the route between IP address 10.0.2.15 and IP address 192.168.1.40. Which of the following commands will accomplish this task?

Question39: 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?

Question40: A systems administrator created a user cron to run a scheduled database backup cronjob on the server at 1 a.m. every day. The following is the cronjob syntax:
0 1 * * * /bin/sh backup.sh
The backups, however, are not being created. When checking the crontab file, the administrator sees the following error:
/var/spool/cron/crontab/cron: Permission denied
Which of the following will permit the cronjob to execute?

Question41: A Linux user is trying to execute commands with sudo but is receiving the following error:
$ sudo visudo
>>> /etc/sudoers: syntax error near line 28 <<<
sudo: parse error in /etc/sudoers near line 28
sudo: no valid sudoers sources found, quitting
The following output is provided:
# grep root /etc/shadow
root :* LOCK *: 14600 ::::::
Which of the following actions will resolve this issue?

Question42: 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?

Question43: A systems administrator intends to use a UI-JID to mount a new partition per-manently on a Linux system. Which of the following commands can the adminis-trator run to obtain information about the UUlDs of all disks attached to a Linux system?

Question44: 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?

Question45: 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?

Question46: Which of the following options describes the purpose of YAML?

Question47: An administrator accidentally installed the httpd RPM package along with several dependencies. Which of the following options is the best way for the administrator to revert the package installation?

Question48: 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?

Question49: Which of the following will prevent non-root SSH access to a Linux server?

Question50: 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?

Question51: A junior administrator is trying to set up a passwordless SSH connection to one of the servers. The administrator follows the instructions and puts the key in the authorized_key file at the server, but the administrator is still asked to provide a password during the connection.
Given the following output:

Which of the following commands would resolve the issue and allow an SSH connection to be established without a password?

Question52: A junior Linux administrator is tasked with installing an application. The installation guide states the application should only be installed in a run level 5 environment.

Which of the following commands would ensure the server is set to runlevel 5?

Question53: As a Systems Administrator, to reduce disk space, you were tasked to create a shell script that does the following:
Add relevant content to /tmp/script.sh, so that it finds and compresses rotated files in /var/log without recursion.
INSTRUCTIONS
Fill the blanks to build a script that performs the actual compression of rotated log files.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

Question54: A systems engineer deploys a new application server, but the server cannot communicate with the back-end database hostname. The engineer confirms that the application server can ping the database server's IP address. Which of the following is the most likely cause of the issue?

Question55: Which of the following data structures is written in JSON?

Question56: 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?

Question57: While troubleshooting server issues, a Linux systems administrator obtains the following output:
yaml
total used free shared buff/cache available
Mem: 3736 3538 33 2 48 25
Swap: 2047 1824 223
Which of the following best describes the state of the system?

Question58: Users are reporting that a Linux server is responding slowly. A systems administrator troubleshooting the server issue sees the following iostat output, with %iowait at 50.38. Which of the following is most likely the issue?

Question59: A user (userA) has reported issues while logging in to the system. The following output has been provided:
bash
Could not chdir to home directory /home/userA: Permission denied
-bash: /home/userA/.bash_profile: Permission denied
# cat /etc/passwd | grep userA
userA:x:1234:3400:userA account:/home/userA/:/bin/bash
# passwd -S userA
userA PS 2022-10-17 1 99999 0 (Password set. SHA512 crypt.)
# groups userA
admin dev usergrp
# ls -lth /home/
drwx------ 7 root admin 9 Jan 17 2019 userA
drwxr-xr-x 4 userC app 9 Jan 23 2020 userC
Which of the following describes the issue userA is having?

Question60: 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?

Question61: An administrator thinks that a package was installed using a snap. Which of the following commands can the administrator use to verify this information?

Question62: Which of the following tools is BEST suited to orchestrate a large number of containers across many different servers?

Question63: 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?

Question64: 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?

Question65: 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?

Question66: 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?

Question67: 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?

Question68: Due to performance issues on a server, a Linux administrator needs to terminate an unresponsive process. Which of the following commands should the administrator use to terminate the process immediately without waiting for a graceful shutdown?

Question69: 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?

Question70: A Linux administrator is configuring network traffic forwarding. Despite having proper iptables rules, the traffic forwarding is not working. Which of the following commands will allow Linux to pass network traffic between different interfaces?

Question71: 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?

Question72: Rugged appliances are small appliances with ruggedized hardware and like Quantum Spark appliance they use which operating system?

Question73: Joe, a user, is unable to log in to the Linux system. Given the following output:

Which of the following commands would resolve the issue?

Question74: A Linux administrator needs to determine if prerequisites are met. One of the application requirements is to install Perl on a system. Which of the following commands would accomplish this task?

Question75: A non-privileged user is attempting to use commands that require elevated account permissions, but the commands are not successful. Which of the following most likely needs to be updated?

Question76: 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?

Question77: Using AD Query, the security gateway connections to the Active Directory Domain Controllers using what protocol?

Question78: 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?

Question79: Which of the following specifications is used to perform disk encryption in a Linux system?

Question80: Which of the following technologies provides load balancing, encryption, and observability in containerized environments?

Question81: 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?

Question82: overwrite any existing files. Which of the following commands would indicate that the file already exists?

Question83: An administrator needs to make some changes in the IaC declaration templates. Which of the following commands would maintain version control?

Question84: A network administrator issues the dig www.foo.com command and receives an NXDOMAIN response. Which of the following files should the administrator check first?

Question85: 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?

Question86: 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?

Question87: A systems administrator needs to remove a disk from a Linux server. The disk size is 500G, and it is the only one that size on that machine. Which of the following commands can the administrator use to find the corresponding device name?

Question88: 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?

Question89: A Linux administrator needs to forward port 8000 on a remote server to port 8000 on a local server. Which of the following commands should the administrator run on the local server to achieve this goal?

Question90: After connecting to a remote host via SSH, an administrator attempts to run an application but receives the following error:
arduino
Error: cannot open display:
Which of the following should the administrator do to resolve this error?

Question91: A Linux administrator has logged in to a server for the first time and needs to know which services are allowed through the firewall. Which of the following options will return the results for which the administrator is looking?

Question92: 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?

Question93: 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?

Question94: 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?

Question95:

Question96: 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?

Question97: A Linux administrator is troubleshooting an issue in which an application service failed to start on a Linux server. The administrator runs a few commands and gets the following outputs:

Based on the above outputs, which of the following is the MOST likely action the administrator should take to resolve this issue?

Question98: 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?

Question99: A Linux engineer receives reports that files created within a certain group are being modified by users who are not group members. The engineer wants to reconfigure the server so that only file owners and group members can modify new files by default. Which of the following commands would accomplish this task?

Question100: 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?

Question101: 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?

Question102: Following the migration from a disaster recovery site, a systems administrator wants a server to require a user to change credentials at initial login. Which of the following commands should be used to ensure the aging attribute?

Question103: 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?

Question104: 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 /.

Question105: A Linux engineer has been notified about the possible deletion of logs from the file /opt/app/logs. The engineer needs to ensure the log file can only be written into without removing previous entries.

Which of the following commands would be BEST to use to accomplish this task?

Question106: Which of the following is a benefit of a service mesh?

Question107: 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?

Question108: 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?

Question109: A Linux administrator has installed a web server, a database server, and a web application on a server. The web application should be active in order to render the web pages. After the administrator restarts the server, the website displays the following message in the browser: Error establishing a database connection. The Linux administrator reviews the following relevant output from the systemd init files:

The administrator needs to ensure that the database is available before the web application is started. Which of the following should the administrator add to the HTTP server .service file to accomplish this task?

Question110: 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?

Question111: A Linux administrator needs to create a new user named user02. However, user02 must be in a different home directory, which is under /comptia/projects. Which of the following commands will accomplish this task?

Question112: 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?

Question113: A Linux administrator is installing a web server and needs to check whether web traffic has already been allowed through the firewall. Which of the following commands should the administrator use to accomplish this task?

Question114: 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?

Question115: A Linux engineer needs to block an incoming connection from the IP address 2.2.2.2 to a secure shell server and ensure the originating IP address receives a response that a firewall is blocking the connection. Which of the following commands can be used to accomplish this task?

Question116: 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?

Question117: A systems administrator is creating new user accounts on several Linux machines and wants to automate the process from a Linux system used for operations. In this operations system, the list of servers is located in the /home/user/serverslist file and the list of user accounts is located in the /home/user/userslist file. Which of the following scripts will help accomplish this task?

Question118: 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?

Question119: A systems administrator identifies multiple processes in a zombie state. Which of the following signals would be best for the administrator to send to the PPID?

Question120: 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?

Question121: 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?

Question122: A Linux systems administrator is troubleshooting an I/O latency on a single CPU server. The administrator runs a top command and receives the following output:
%Cpu(s): 0.2 us, 33.1 sy, 0.0 ni, 0.0 id, 52.4 wa, 0.0 hi, 0.2 si, 0.0 st Which of the following is correct based on the output received from the exe-cuted command?

Question123: After trying to install an RPM package unsuccessfully, a systems administrator verifies the integrity of the package's database. The administrator discovers that the database is corrupted and needs to be recreated. Which of the following commands will help accomplish this task?

Question124: 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?

Question125: A systems administrator is cloning a system partition /dev/sda1 to /dev/sdc1. Which of the following commands would allow the administrator to accomplish this task most efficiently?

Question126: A junior systems administrator recently installed an HBA card in one of the servers that is deployed for a production environment. Which of the following commands can the administrator use to confirm on which server the card was installed?

Question127: A systems administrator is tasked with preventing logins from accounts other than root, while the file /etc/nologin exists. Which of the following PAM modules will accomplish this task?

Question128: A Linux systems administrator is updating code. After completing the update, the administrator wants to publish the updated code without including the configuration files. Which of the following should the administrator use to accomplish this task?

Question129: 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?

Question130: A Linux administrator is trying to remove the ACL from the file /home/user/dat a. txt but receives the following error message:

Given the following analysis:

Which of the following is causing the error message?

Question131: A systems administrator installed a new software program on a Linux server. When the systems administrator tries to run the program, the following message appears on the screen.

Which of the following commands will allow the systems administrator to check whether the system supports virtualization?

Question132: A cloud engineer needs to launch a container named web-01 in background mode. Which of the following commands will accomplish this task''

Question133: In order to copy data from another VLAN, a systems administrator wants to temporarily assign IP address 10.0.6 5/24 to the newly added network interface enp1s0f1. Which of the following commands should the administrator run to achieve the goal?

Question134: 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?

Question135: A systems administrator is deploying three identical, cloud-based servers. The administrator is using the following code to complete the task:

Which of the following technologies is the administrator using?

Question136: 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?

Question137: The application team has reported latency issues that are causing the application to crash on the Linux server. The Linux administrator starts troubleshooting and receives the following output:

Which of the following commands will improve the latency issue?

Question138: 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?

Question139: 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?

Question140: 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?

Question141: 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?

Question142: A Linux systems administrator is working to obtain the installed kernel version of several hundred systems. Which of the following utilities should the administrator use for this task?

Question143: 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?

Question144: Developers have requested implementation of a persistent, static route on the application server. Packets sent over the interface eth0 to 10.0.213.5/32 should be routed via 10.0.5.1. Which of the following commands should the administrator run to achieve this goal?

Question145: SIMULATION
A senior administrator has placed a private key for user admin in your home directory.
The server you need to remotely access is server1 and SSH is listening on port 2222.
INSTRUCTIONS
Part 1
Review the command output and build the correct command to place the private key into your SSH folder.
Part 2
Review the command output and build the correct command to set the file permissions.
Part 3
Review the command output and build the correct command to set the correct ownership.
In each part, click on objects to build a complete command. Command objects may be used more than once, but not all will be used. Use _ as the spacebar. Click the arrow to remove any unwanted objects from your command.
Part 4
Select the proper file to edit for remote server access. Then, build the correct configuration output based on the server name, ports, and files.

Question146: A Linux engineer needs to create a custom script, cleanup.sh, to run at boot as part of the system services. Which of the following processes would accomplish this task?

Question147: Linux system users report that over the past few months, a server has stopped responding at least twice each day. Every time this happens, the users have to restart the server to recover it. A systems administrator diagnosing the issue collects the following outputs:
csharp
Output 1
[Tue Aug 31 16:36:42 2021] oom-killer invoked by java: gfp_mask=0x280da2 order=0, oom_score_adj=0
[Tue Aug 31 16:36:42 2021] java cpuset=/ mems_allowed=0
makefile
Output 2
[root@server]# free -m
total used free shared buff/cache available
Mem: 15819 15026 174 92 619 134
Swap: 0 0 0
Which of the following is the best permanent resolution for the system?

Question148: 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?

Question149: A systems administrator needs to clone the partition /dev/sdc1 to /dev/sdd1. Which of the following commands will accomplish this task?

Question150: 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?

Question151: 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?

Question152: A systems administrator wants to permit access temporarily to an application running on port 1234/TCP on a Linux server. Which of the following commands will permit this traffic?

Question153: A Linux administrator modified the SSH configuration file. Which of the following commands should be used to apply the configuration changes?

Question154: 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?

Question155: A user created the following script file:
# ! /bin/bash
# FILENAME: /home/user/ script . sh
echo "hello world"
exit 1
However, when the user tried to run the script file using the command "script . sh, an error returned indicating permission was denied. Which of the follow-ing should the user execute in order for the script to run properly?

Question156: A Linux systems administrator is trying to execute a particular shell script on a server. The administrator reviews the following outputs:
shell
$ ./startup.sh
bash: ./startup.sh: Permission denied
$ ls -l startup.sh
-rw-rw-r-- 1 companyabc companyabc 18 October 15:35 startup.sh
Which of the following commands should the administrator use to allow the script to run?

Question157: A user is asking the systems administrator for assistance with writing a script to verify whether a file exists. Given the following:

Which of the following commands should replace the <CONDITIONAL> string?

Question158: A Linux administrator is configuring a log collector agent to monitor logs in /var/log/collector. The agent is reporting that it cannot write to the directory. The agent runs as the logger user account. The administrator runs a few commands and reviews the following output:
makefile
Output 1:
drwxr-xr-x. 1 root root 0 Oct 20:13 collector
Output 2:
file: /var/log/collector
owner: root
group: root
user::rwx
group::r-x
mask::rwx
other::r-x
Output 3:
uid=1010(logger) gid=1010(monitor) groups=1010(monitor)
Which of the following is the best way to resolve the issue?

Question159: 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?

Question160: Some servers in an organization have been compromised. Users are unable to access to the organization's web page and other services. While reviewing the system log, a systems administrator notices messages from the kernel regarding firewall rules:

Which of the following commands will remediate and help resolve the issue?

Question161: A systems administrator has been unable to terminate a process. Which of the following should the administrator use to forcibly stop the process?