psmon is a Perl script which can be run as a stand alone program or a fully functional background daemon, capable of logging to syslog with customisable email notification facilities.
The user defines a set of rules in an Apache-style plain text configuration file. These rules describe what processes should always be running on the system, and any limitations on concurrent instances, TTL and maximum CPU/memory usage of processes. psmon scans the UNIX process table and, using the set of rules defined in the configuration file, will respawn any dead processes, and/or slay or "deal with" any aggressive or illegal processes.
Originally written and designed for use by a UK ISP, it is designed to be as flexible as posible, for use on a per-user, or system-wide server basis.
For further detailed information on what psmon can do for you, how flexible it is and a list of all its features, please read the documentation. Please feel free to email me at nicolaworthington@msn.com with any questions, suggestions or bug reports you may have.