mount --rbind /proc /chroot/proc
mount --rbind /sys /chroot/sys
mount --rbind /dev /chroot/dev
mount --rbind /tmp /chroot/tmp
chroot /chroot

If you want to execute X Windows apps:

xauth extract - unix:0 | xauth -f /chroot/home/user/.Xauthority merge -

• https://unix.stackexchange.com/questions/10743/what-to-do-to-run-gui-java-app-in-chrooted-environment