EMT Practice Test

1. Question Content...

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Question1: 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?

Question2: 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?

Question3: 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?

Question4: A Linux administrator needs to remove software from the server. Which of the following RPM options should be used?

Question5: 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?

Question6: A Linux administrator has been tasked with installing the most recent versions of packages on a RPM-based OS. Which of the following commands will accomplish this task?

Question7: A Linux administrator needs to remove all local firewall rules on a Linux system. Which of the following commands should the administrator run?

Question8: 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?

Question9: A Linux administrator is implementing a CI/CD process for the company's internal accounting web application. Which of the following best defines the purpose of this process?

Question10: 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?

Question11: A Linux administrator needs to harden a system and guarantee that the Postfix service will not run, even after a restart or system upgrade. Which of the following commands allows the administrator to fulfill the requirement?

Question12: 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?

Question13: 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?

Question14: A Linux administrator modified the SSH configuration file. Which of the following commands should be used to apply the configuration changes?

Question15: A junior administrator is setting up a new Linux server that is intended to be used as a router at a remote site. Which of the following parameters will accomplish this goal?

Question16: 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?

Question17: 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?

Question18: 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?

Question19: 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?

Question20: A Linux administrator changed a systemd configuration. However, the change was not applied after the system was restarted. Which of the following commands is required to apply the change?

Question21: 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?

Question22: A systems administrator checked out the code from the repository, created a new branch, made changes to the code, and then updated the main branch. The systems administrator wants to ensure that the Terraform state files do not appear in the main branch. Which of following should the administrator use to meet this requirement?

Question23: 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?

Question24: A systems administrator is customizing a new Linux server. Which of the following settings for umask would ensure that new files have the default permissions of -rw-r--r--?

Question25: 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?

Question26: 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?

Question27: 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?

Question28: 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?

Question29: 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?

Question30: A systems administrator needs to know the mail exchange (MX) record for the foo.com domain. Which of the following commands will accomplish this task?

Question31: 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?

Question32: 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?

Question33: Which of the following can be used as a secure way to access a remote termi-nal?

Question34: 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?

Question35: A systems administrator is checking the system logs. The administrator wants to look at the last 20 lines of a log. Which of the following will execute the command?

Question36: A Linux administrator is creating a directory called CompTIA_doc and needs to switch to another location to perform some system-related tasks. Which of the following commands should the administrator use for this task?

Question37: 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?

Question38: A systems administrator wants to list all local account names and their respective UIDs. Which of the following commands will provide output containing this information?

Question39: A Linux administrator needs to run a web application on a server that requires the use of a desktop web browser to enter the final configuration information. The administrator determines the server is running in multi-user mode. The administrator verifies that a web browser is installed on the server and that it has a display manager installed. Which of the following commands will best allow the administrator to temporarily use the web browser on the server?

Question40: 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?

Question41: 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?

Question42: 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?

Question43: An administrator is running a web server in a container named web, but none of the error output is not showing. Which of the following should the administrator use to generate the errors on the container?

Question44: 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?

Question45: Due to performance issues on a server, a Linux administrator needs to termi-nate an unresponsive process. Which of the following commands should the administrator use to terminate the process immediately without waiting for a graceful shutdown?

Question46: 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?

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 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 /.

Question49: Rugged appliances are small appliances with ruggedized hardware and like Quantum Spark appliance they use which operating system?

Question50: 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?

Question51: 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?

Question52: 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?

Question53: Users report that they cannot access some files located in the /opt/finapp directory after a power outage caused an unexpected server restart. A Linux administrator examines the following filesystem details and system logs:
# mount | grep finapp
/dev/mapper/rhel-opt_finapp on /opt/finapp type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota)
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931.5G 0 disk
|-sda1 8:1 0 1G 0 part /boot
|-sda2 8:2 0 930.5G 0 part
|-rhel-root 253:0 0 30.5G 0 lvm /
|-rhel-opt_finapp 253:1 0 900G 0 lvm /opt/finapp
# grep opt_finapp /var/log/messages
XFS (opt_finapp): Corruption detected in inode 3645, extent tree
Which of the following commands should the administrator run in an attempt to fix the filesystem?

Question54: An administrator is provisioning an Apache web server. When the administrator visits the server website, the browser displays a message indicating the website cannot be reached. Which of the following commands should the administrator use to verify whether the service Is running?

Question55: A cloud engineer is installing packages during VM provisioning. Which of the following should the engineer use to accomplish this task?

Question56: Which of the following should be used to verify the integrity of a file?

Question57: 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.

Question58: A Linux administrator is tasked with moving files in a database server. The administrator must not overwrite any existing files. Which of the following commands would indicate that the file already exists?

Question59: 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?

Question60: Which of the following directories contains binaries that only a root user should run?

Question61: 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?

Question62: An administrator accidentally deleted the /boot/vmlinuz file and must resolve the issue before the server is rebooted. Which of the following commands should the administrator use to identify the correct

Question63: 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?

Question64: A Linux administrator has defined a systemd script docker-repository.mount to mount a volume for use by the Docker service. The administrator wants to ensure that the Docker service does not start until the volume is mounted. Which of the following configurations needs to be added to the Docker service definition to best accomplish this task?

Question65: 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?

Question66: 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?

Question67: 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?

Question68: A Linux administrator updated the configuration file for the httpd web service. The administrator needs to apply the updated changes to the service without interrupting any running sessions. Which of the following commands should the administrator run to accomplish this task?

Question69: 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?

Question70: 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?

Question71: A diagnostic tool reports a "host seems down" event for a server with an IP address of 192.168.47.44. Which of the following commands should the administrator use to confirm the host down event?

Question72: 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?

Question73: 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?

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 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?

Question76: 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?

Question77: 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?

Question78: 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?

Question79: 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?

Question80: A cloud engineer needs to launch a container named web-01 in background mode. Which of the following commands will accomplish this task''

Question81: A Linux administrator recently downloaded a software package that is currently in a compressed file. Which of the following commands will extract the files?

Question82: 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?

Question83: 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?

Question84: 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?

Question85: An administrator made a change to a system's network configuration. Which of the following best represents what the administrator should do to have the new configuration take effect?

Question86: 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?

Question87: 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?

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 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?

Question90: A Linux administrator is creating a user that can run the FTP service but cannot log in to the system. The administrator sets /bin/false as a login shell for the user. When the user tries to run the FTP service, it is rejected with an "invalid shell: /bin/false" message. Which of the following is the best way to resolve the issue?

Question91: 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?

Question92: 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?

Question93: An administrator is running a web server in a container named WEB, but none of the error output is showing. Which of the following should the administrator use to generate the errors on the container?

Question94: 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?

Question95: 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?

Question96: 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?

Question97: Based on an organization's new cybersecurity policies, an administrator has been instructed to ensure that, by default, all new users and groups that are created fall within the specified values below.

To which of the following configuration files will the required changes need to be made?

Question98: A systems administrator is investigating a service that is not starting up. Given the following information:

Which of the following systemd commands should the administrator use in order to obtain more details about the failing service?

Question99: 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?

Question100: 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?

Question101: Which of the following is a benefit of a service mesh?

Question102: Which of the following technologies provides load balancing, encryption, and observability in containerized environments?

Question103: 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?

Question104: 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?

Question105: 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?

Question106: 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?

Question107: A Linux systems administrator needs to compress a file named passwords.txt. The compressed file should be saved as passwords.txt.gz. Which of the following commands should the administrator use to accomplish this task?

Question108: Which of the following commands should a technician use to create an administrative account for the username Joe?

Question109: 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?

Question110: Which of the following options describes the purpose of YAML?

Question111: A Linux system fails to start and delivers the following error message:

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

Question112: 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?

Question113: 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?

Question114: 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?

Question115: 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?

Question116: The security team has identified a web service that is running with elevated privileges A Linux administrator is working to change the systemd service file to meet security compliance standards. Given the following output:

Which of the following remediation steps will prevent the web service from running as a privileged user?

Question117: 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?

Question118: A network administrator issues the dig www.comptia.org command and receives an NXDOMAIN response. Which of the following files should the administrator check first?

Question119: Which of the following enables administrators to configure and enforce MFA on a Linux system?

Question120: Which of the following tools is commonly used for creating CI/CD pipelines?

Question121: A systems administrator wants to upgrade /bin/ someapp to a new version, but the administrator does not know the package name. Which of the following will show the RPM package name that provides that binary file?

Question122: 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?

Question123: 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?

Question124: 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?

Question125: 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?

Question126: 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?

Question127: At what point is the Internal Certificate Authority (ICA) created?

Question128: A newly hired junior administrator is studying the format of the /var/log/messages file. Which of the following commands should the administrator use to preserve the contents of the original file while also creating an identical file in the /home/admin directory?

Question129: An administrator needs to allow remote administrative access to a Linux server only to employees who are using the authorized private key. Which of the following options should the administrator set in the SSHD configuration file to achieve the goal?

Question130: A Linux administrator needs to transfer a local file named accounts . pdf to a remote / tmp directory of a server with the IP address 10.10.10.80. Which of the following commands needs to be executed to transfer this file?

Question131: A Linux administrator needs to redirect all HTTP traffic temporarily to the new proxy server 192.0.2.25 on port 3128. Which of the following commands will accomplish this task?

Question132: A systems administrator wants to check for running containers. Which of the following commands can be used to show this information?

Question133: 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?

Question134: A security analyst is monitoring the network to identify latency or slowdowns during a vulnerability scan. Which of the following functions will best achieve this?
bash
function x() {
info=$(ping -c 1 $1 | awk -F "/" 'END {print $5}')
echo "$1 | $info"
}

Question135: 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?

Question136: 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?

Question137: A Linux system is failing to boot. The following error is displayed in the serial console:
[[1;33mDEPEND[Om] Dependency failed for /data.
[[1;33mDEPEND[Om] Dependency failed for Local File Systems
...
Welcome to emergency mode! After logging in, type "journalctl -xb" to viewsystem logs, "systemct1 reboot" to reboot, "systemct1 default" to try again to boot into default mode.
Give root password for maintenance
(or type Control-D to continue}
Which of the following files will need to be modified for this server to be able to boot again?

Question138: 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?

Question139: 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?

Question140: 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?

Question141: 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?

Question142: 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?

Question143: A systems administrator is receiving complaints about slow performance and system crashes. The administrator suspects memory and CPU issues. Which of the following is the first action the administrator should take to troubleshoot and resolve these issues?