http://dywfwwrpxmyaz3cpydemb3k7qw5d5nevat6rpwzqndyj2h2xxf5vibid.onion/notes.html
A: No general answer, depends on
the task of the server, the basic task to connect to auth server for
instance is not too hard. Telnetting to a Hurd box gives a shell without user id by default
and such process cannot access any protected files, but one can give
files specifically permission to be used without an user id: a pretty
secure environment to run unsecure daemons.