LDAP Authentication In Linux | HowtoForge - Linux Howtos and Tutorials

This howto will show you how to store your users in LDAP and authenticate some of the services against it. It will not show how to install particular packages, as it is distribution/system dependant, instead it will focus on pure configuration of all componenets needed to have LDAP authentication/storage of users. The howto assumes that you are migrating from a regular passwd/shadow authentication, but it is also suitable for people who do it from scratch.

http://www.howtoforge.com/linux_ldap_authentication