Prof Andrew S. Tanenbaum (AST) Author of many OS and Network Books
and Creator of Minix & Amoeba OS. URL: http://www.cs.vu.nl/~ast/

One Day One Command
===================

host — DNS Look-up Utility

Summary:

host is a simple utility for performing DNS (Domain Name Service)
lookups.  It is normally used to convert names to IP addresses and
vice versa.

Examples:

$ host google.com — Show the IP Address of Google.com.

$ host -v google.com — Show detailed output.

$ host -a google.com — Show more details.

$ host 127.0.0.1 — Do reverse lookup and Show the host name.

$ host -l mydomain.com — List all hosts available in MyDomain.

Read: man host