Which configuration file does sudo read when determining if a user is permitted to run applications
with root privileges?

Which of the following commands can be used to associate open TCP ports with the processes
that opened the ports?

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Instead of using specific host names or IP addresses, which string can be used in /etc/hosts.allow
entries to cover any remote host no matter of its name or address? (Specify the relevant string

only without any additional options or arguments.)

Which of the following resources can be directly limited for a given user using ulimit? (Choose
THREE correct answers.)

Depending on the host’s configuration, which of the following files can be used to turn on and off
network services running on a host? (Choose TWO correct answers.)

How do shadow passwords improve the password security in comparison to standard passwd
passwords?

What is true regarding public and private SSH keys? (Choose TWO correct answers.)

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Which command is used to add OpenSSH private keys to a running ssh-agent instance? (Specify
the file name only without any path.)

Which of the following commands gets the GnuPG public key with the id 63B4835B from the
keyserver example.com?