[luau] Re: UML / read-only root file system (Was: INFO: Heavy duty storage needs)
MonMotha
monmotha at indy.rr.com
Fri May 3 18:46:14 PDT 2002
Kernel patching is wonderful :)
A UML is "User-Mode Linux", basically starting up a new kernel as a
userland process, and you get a whole miniture system inside the new
process. Of course, you can do whatever you want to this kernel you're
starting up, including using a filesystem that is readonly or patching
the kernel to remove read-write support, or even simply controlling file
permissions on the outside of the UML (make sure the user the UML
process is running as can't write to the image file).
--MonMotha
Robert Green wrote:
> --- MonMotha <monmotha at indy.rr.com> wrote:
>
>>I've used UML before to isolate services. Ever tried breaking out
>>of a
>>chroot jail? This is even better. Ever tried breaking a system
>>where
>>the only thing available is a readonly root filesystem with a
>>single
>>daemon and a few required utils? Gotta love UML :)
>>
>>--MonMotha
>>
>
>
> Pardom my ignorance, but what's "UML" ? And how do you get a readonly
> root file system? CD-ROM, or is it just the file permissions?
>
> I'm planning on setting up a web server and a MUD server and it might
> be handy to know how to make it tamper proof, as it were....
>
> Thanks,
>
> Rob
>
>
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