chroot can be used for that or something that sounds like that....
What I use chroot the most for is for compiling software in an isolated
environment...environment being the key...
You can set-up a complete other installation of linux in another directory or
device, and chroot into it....its own different kernel, its own /proc...its
own everything if you so desire...
when you chroot you are issuing a command in the chrooted environment and
exiting as soon as its done...to have a shell in the chroot you chroot option
option /bin/bash --login or something similar...using logout to exit the
chroot...
I don't even know if I am helping you here so I will shut up now.
Scot Mc Pherson
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