OpenLDAP is a directory service that predates many proprietary systems and provides a universal authentication mechanism for client system to authenticate to and white pages system to search. In this course we will take your through the basics of openLDAP leading to an install. From there you will learn how to develop your system further by adding and searching entries. Next we will move on to authentication to openLDAP from other Linux clients and services such as Apache HTTPD. Finally we will look at scaling out our system by including replication to add failover and fault-tolerance to the Directory