hostname -f says "hostname: the specified hostname is invalid". Guess why?

Posted by Ivan on Server Fault See other posts from Server Fault or by Ivan
Published on 2010-06-29T04:45:13Z Indexed on 2012/11/06 17:05 UTC
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ubuntu

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dns

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hostname

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hosts

hostname -f says "hostname: the specified hostname is invalid". The hostname (FQDN) specified in /etc/hostname is also listed in /etc/hosts and is pingable. No actual DNS server yet of the host knows. Is this a reason of the error reported or something else? (the OS is Ubuntu 10.04 Server).

Update: registering the host at a DNS server (so that the name can be successfully resolved via Internet) did not help.

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