start with chroot

wilber:~# ls --version
ls (coreutils) 5.2.1
Written by Richard Stallman and David MacKenzie.

Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

wilber:~# chroot /vservers/woody /bin/ls --version
ls (fileutils) 4.1
Written by Richard Stallman and David MacKenzie.

Copyright (C) 2001 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
wilber:~#