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"A computer program that runs without a user interface" (adjective). Seems to be real, but what is it exactly? Is it specific to a particular flavour of Unix? Where does the "head" come from? Citations would be handy, in any case. Equinox◑ 22:21, 14 November 2009 (UTC)
"head" refers to a console, ie. keyboard and screen; no it is not peculiar to a flavour of unix. 220.127.116.11 07:12, 28 May 2010 (UTC)
It's in common use. Try b.g.c running headless or running headless server --dmh 01:37, 28 July 2010 (UTC)