Your FTP server has been under attack, and the ISP of the attacker has been less than helpful in mitigating the attacks. So you decide that all connections from
that ISP (badguy.example.org) to your FTP server will be denied and sent a message. Which line in your /etc/hosts.allow will have the desired effect?

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The _______ command is used to modify a user’s account information.

What command do you use to generate an OpenSSH host key?

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What kind of DNS entries are used to get the hostname of a given IP address?
Please enter exactly one word.

What configuration file contains the list of directories shared via NFS?

You have a file /etc/resolv.conf, but the computer does not use the configured DNS servers to look up host names. What is most likely the problem?

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When a change is made to the file controlling what files are made available by NFS, what command must be run to make the changes effective? (Provide only the
command name, not the path or any command switches.)

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Enter the command/servicename that dynamically assigns ports for Remote Procedure Calls (RPC) services like NIS, NFS and similar.

The file /etc/ssh_known_hosts typically contains hosts keys for ______.

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In your DNS configuration, MX records are used to point to the _____ server(s) for your domain.