Say we want to chroot into a different environment residing under /mnt/testEnv which could either be a mounted filesystem or just a directory structure Run: mount -t proc proc /mnt/testEnv/proc Next: mount -o bind /dev /mnt/testEnv/dev Next: mount -t sysfs sys /mnt/testEnv/sys Next: mount -t devpts pts /mnt/testEnv/dev/pts Finally: chroot /mnt/testEnv