CompTIA XK0-005 CompTIA Linux+ Exam Online Training

Question #51

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?

A . iptables is conflicting with firewalld.
B . The wrong system target is activated.
C . FIREWALL_ARGS has no value assigned.
D . The firewalld service is not enabled.

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Question #52

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?

A . docker export <container_id>
B . docker info <container_id>
C . docker start <container_id>
D . docker inspect <container_id>

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Question #53

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?

A . The checkdiskspace.timer unit should be enabled via systemct1.
B . The timers.target should be reloaded to get the new configuration.
C . The checkdiskspace.timer should be configured to allow manual starts.
D . The checkdiskspace.timer should be started using the sudo command.

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Question #54

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?

A . rpm -i wget
B . rpm -qf wget
C . rpm -F wget
D . rpm -V wget

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Question #55

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?

A . dig @example.com 10.10.10.20 a
B . dig @10.10.10.20 example.com mx
C . dig @example.com 10.10.10.20 ptr
D . dig @10.10.10.20 example.com ns

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Question #56

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?

A . chattr +a /opt/app/logs
B . chattr +d /opt/app/logs
C . chattr +i /opt/app/logs
D . chattr +c /opt/app/logs

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Question #57

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?

A . systemct1 status systemd-resolved.service
B . systemct1 enable systemd-resolved.service
C . systemct1 mask systemd-resolved.service
D . systemct1 show systemd-resolved.service

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Question #58

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.