Jail Chroot Project is an attempt of write a tool that builds a chrooted environment. The main goal of Jail is to be as simple as possible, and highly portable. The most difficult step when building a chrooted environment is to set up the right libraries
RASH is a chroot jail wrapper for ordinary Unix shells.
a "shell" that the administrator could assign to a user that would jail that user using Unix's chroot() and then execute a real shell within the jail environment.