In the light of the guide's section "mod_perl for ISPs"
http://perl.apache.org/guide/multiuser.html

There is a new project called: 
The User-mode Linux Kernel http://user-mode-linux.sourceforge.net/

<Quote>
User-Mode Linux is a safe, secure way of running Linux versions and
Linux processes. Run buggy software, experiment with new Linux kernels
or distributions, and poke around in the internals of Linux, all
without risking your main Linux setup.

User-Mode Linux gives you a virtual machine that may have more
hardware and software virtual resources than your actual, physical
computer. Disk storage for the virtual machine is entirely contained
inside a single file on your physical machine. You can assign your
virtual machine only the hardware access you want it to have. With
properly limited access, nothing you do on the virtual machine can
change or damage your real computer, or its software.
</Quote>

So if you want to completely protect one user from another and yourself
from your users this might be yet another alternative to other proposed
solutions at: http://perl.apache.org/guide/multiuser.html

This reminds me IBM's mainframe virtual machines, but now you don't need
to own a mainframe to be able to do have the same.

_____________________________________________________________________
Stas Bekman              JAm_pH     --   Just Another mod_perl Hacker
http://stason.org/       mod_perl Guide  http://perl.apache.org/guide 
mailto:[EMAIL PROTECTED]   http://apachetoday.com http://jazzvalley.com
http://singlesheaven.com http://perlmonth.com   perl.org   apache.org


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