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I have something like this in /etc/hosts: * is pinged to as expected but pinging say outputs:

unknown host

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migrated from Nov 19 '12 at 20:41

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Did you try running man hosts from a terminal? – cdhowie Nov 19 '12 at 18:00
@cdhowie Yes, just now. man hosts | grep '\(aster\|\*\)' outputs nothing useful. – Desmond Hume Nov 19 '12 at 18:02
That's because the feature you're looking for doesn't exist. :) (At least not without running your own DNS server.) – cdhowie Nov 19 '12 at 18:09
@cdhowie Ok, thanks. – Desmond Hume Nov 19 '12 at 18:22
up vote 3 down vote accepted

You have answered your own question!

The /etc/hosts file is a one-to-one mapping between a hostname (not a collection of them) to a particular IP address.

Consider putting this into /etc/hosts file *.com
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Not sure if I answered my own question which actually was more about how to map all subdomains of a domain to an IP address, not a TLD to an IP. – Desmond Hume Nov 19 '12 at 18:07
@DesmondHume - One works and the other does not. – Ed Heal Nov 19 '12 at 18:11

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