In what file are the mail aliases kept for Sendmail? (Provide the complete path)

To disable telnet service on a system, which action should you take?

You want a secure and fast DNS server that must also be quickly accessible remotely.
You should:

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You build and configured a bastion host to act as a router between two internal networks. Both eth0 and eth1 can see hosts on their respective networks, but the
hosts on each network cannot see any hosts on the other network. After verifying that the hosts have the correct gateway route, you decide the bastion host does
not have IP forwarding turned on. To check this cat the file /proc/sys/net/ipv4/ _______ to ensure it has a 1.

When using /etc/ppp/peers/* files, which of the following is true:

Suppose that the command netstat-a hangs for a long time without producing output.
You might suspect:

If you suspect that a gateway machine on your network has failed but you are unsure which machine, which command will help locate the problem?

Identify the statement that would create a default route using a gateway of 192.168.1.1

On a system using shadowed passwords, the correct permissions for /etc/passwd are ____- and the correct permission for /etc/shadow are _______.

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What is the command most often used for configuring network interfaces?