root jail

Hello list, Does someone know's a good solution to make a root jail for telnet and SSH under (of course) Linux? I have to give some users shell acces, but only in there home directory. By this time I have a script (sudo + chroot) that run's when a user logon, but the problem is that a user can interupt this because I have to start the bash shell first. Is there a other way? Thanks, Maarten Oedekerk