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>Is it necessary to include all the hosts which I specify in DNS
>configuration ( forward & reverse lookup files ) in /etc/hosts file ?
No its not necessary.
>Because if I uncomment one of the entries in /etc/hosts file than it does
>not work ?
This may be due to that either
(1) You have not specified the name server in ur /etc/resolv.conf file or
(2) Your name server is not working properly.
(3) You are not able to connect to your name server.
Check for the aboves, then i feel u will find the answer to ur problem -;)
regards
Jack.
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