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dns client

Mail delivery: DNS: Service unavailable error

Q. My mail delivery fails with DNS: Service unavailable error. How do I fix this error under Linux / UNIX operating systems?
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Windows Displaying the Contents of DNS

Q. How do I display the contents of my DNS client resolver cache under Windows server 2000 / 2003 / 2008 / XP / Vista operating systems?
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Cannot ping Linux / UNIX / Windows server by name but can ping by its IP address

Q. I have Debian Linux server in remote data center. I can ping server by its IP but not by hostname such as server.domain.com. How do I ping server by hostname?

A. This is client side DNS problem. All you have to do is setup correct DNS server:

=> Linux DNS Client Configuration

=> Solaris DNS Client Configuration