[Zope] synchronize ZOPE passwords - Unix passwords

Hi! Is there a possibility to make ZOPE use the passwords of standard Linux system users? So if a user of the Linux machine has changed his password it should also automatically change his password in ZOPE system (not nessesarily immediately, but e.g. before he logs in ZOPE) How it is possible to change the roles of a ZOPE user in synchronization with groups in Linux? I can access Linux user-group-password structures from Python, but could I compare and modify ZOPE user passwords in Python, and how? thank you in advance Andrey