The directory underneath http://www.nat.vu.nl/~silvia/ has been created, you can reach it on the network as \\www.few.vu.nl\www\users\silvia, or on an FEW UNIX system as /usr/local/www/users/silvia.
Please create files in it without delay, because a nightly cleanup script will remove the new empty directory otherwise.
Warning! Any file readable or writable by this web server is by nature readable or writable by anyone with access to this web server. So be careful, don't put anything of a sensitive nature in your personal web space.