How to enforce company password complexity in 10.04

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http://askubuntu.com – I need to configure a Ubuntu 10.04 server to follow a strict company password policy that specifies the following: at least one upper case at least one lower case at least one digit at least one special character I've had a look around and all I have found is the instructions for specifying the password length, but I have yet to find something that relates to specifying the content of the password regarding the above points. Any help would be appreciated. (HowTos)