reverse lookup

How do I use nslookup command line administrative tool for testing and troubleshooting DNS servers including reverse lookup under UNIX or Windows operating systems? How do I look up an IP address of a domain or host on a network using nslookup command?

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I am a new Linux and Unix command line user. How do I test or check reverse DNS for given IP address under Linux, OS X, BSD, Unix-like or Windows XP/Server 2003 based systems?

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