This document provides instructions for installing and configuring an LDAP server plus phpLDAPadmin on a CentOS system. The key steps include: 1. Installing LDAP server packages and configuring slapd.conf and the LDAP database. 2. Initializing the LDAP directory with a root user and organizational units. 3. Installing a web server and phpLDAPadmin to provide a web interface for managing the LDAP server. 4. Configuring phpLDAPadmin to connect to the LDAP server by editing its config.php file.