The easy way to Lightweight Directory Access Protocol, or LDAP

The Lightweight Directory Access Protocol, or LDAP is the Linux version of Active Directory for Linux. Ferdora Core/Red Hat/CentOS has there version that is worth looking at, there Directory Servers make install and upkeep a lot easier for Admins that are looking to stay way from command line.
The way that the system works is by using a web driven interface to update and maintain the LDAP directory.

Key Features

• Multi-Master Replication, to provide fault tolerance and high write performance
• Scalability: thousands of operations per second, tens of thousands of concurrent users, tens of millions of entries, hundreds of gigabytes of data
• The codebase has been developed and deployed continuously by the same team for more than a decade
• Extensive documentation, including helpful Installation and Deployment guides
• Active Directory user and group synchronization
• Secure authentication and transport (SSLv3, TLSv1, and SASL)
• Support for LDAPv3
• On-line, zero downtime, LDAP-based update of schema, configuration, management and in-tree Access Control Information (ACIs)
• Graphical console for all facets of user, group, and server management

Here’s the link to the site for the Documentation and also the Installation information.
The install is really simple and the questions are much like the questions that you’d get from Active directory it self.