dns queries

How do I perform dns lookup under Linux or UNIX or Apple OS X operating systems without using 3rd party web sites for troubleshooting DNS usage?

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Q. How do I monitor my Bind 9 named (or any other dns server) server traffic / network traffic under Linux? How do I find out and view current DNS queries such as A, MX, PTR and so on in real time? How do I find out who is querying my DNS server or specific domain or specific dns client IP address?

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How do I set caching dns server to speed up dns lookup for my LAN (500 PC)? The DNS lookups creating a lot of network activity. There are a few times when this causes performance issues. How do I configure caching dns under Debian Linux?

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I‘m on a Dial UP Internet connection under Linux and frequent dial up disconnection causing dns problems. How do I flush DNS cache under UNIX / Linux distribution using a shell prompt?

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