knoppix filesystem

Gday,

Im stumped and cant figure out how knoppix allows you to write to a
linked file then store that file on the ramdisk.

This is an example

[email protected][etc]# ls -la /etc/hosts
lrwxrwxrwx    1 root     root           18 Jun  4 19:58 /etc/hosts ->
/KNOPPIX/etc/hosts

# edit with vi. echo >>, doesnt work for some reason.
[email protected][etc]# vi /etc/hosts

[email protected][etc]# ls -la /etc/hosts
-rw-r--r--    1 root     root          278 Jun  5 04:26 /etc/hosts

Ive looked through the linuxrc and knoppix-autoconfig but cant seem to find
the section where this magic happens. I know the morphix guys use the
translucency module to do this sort of magic, but how is this done with
knoppix?

-- 

Rene Cunningham
DCLabs Pty Ltd
http://www.dclabs.com.au
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Memory fault - where am I?