Brian Kelsay wrote:
>[email protected] wrote:
>> On Sat, Nov 06, 2004 at 10:26:55PM -0600, David Nicol wrote:
>>
>>>Isn't UML the preferred way to do that?
>>
>>
>> Have you tried to set UML up? =)

Yes. As long as you follow the docs and use the kosher kernel builds it isn't too painful. Time intensive, but not painful...

>> I really liked VMware, but didn't seem to be very fast.  I'm
>> interested in trying out this Xen software.  I'd like to be able to
>> use linux test environments without having to reboot.
>>
>
>Have you tried to just chroot into another one?

For _a_ test environment, that's fine. But not for running multiple simultaneous test environments, or giving away root accounts.

http://www.bpfh.net/simes/computing/chroot-break.html

> To break out of a chroot()ed area, a program should do the following:
>
> o  Create a temporary directory in its current working directory 
> o  Open the current working directory
>
> Note: only required if chroot() changes the calling program's working
>       directory.
> o  Change the root directory of the process to the temporary directory
>    using chroot(). 
> o  Use fchdir() with the file descriptor of the opened directory to
>    move the current working directory outside the chroot()ed area.
>
> Note: only required if chroot() changes the calling program's working
>       directory.
> o  Perform chdir("..") calls many times to move the current working
>    directory into the real root directory. 
> o  Change the root directory of the process to the current working
>    directory, the real root directory, using chroot(".") 

--
Garrett Goebel
IS Development Specialist

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