"Lightweight Directory Access Protocol (LDAP) is a lightweight
client-server protocol for accessing directory services, especially
those that are X.500 based. IBM Directory Server is a mature
product that implements the LDAP protocol. Linux, which is
increasingly popular, provides several system user authentication
methods, including local files, NIS, LDAP, and the PAM mechanism.
Linux is able to use different authentication methods for its
"I used RedHat Linux 7.3 as the target Linux system, and chose
the IBM Directory Server 5.1 as the LDAP server. See the RedHat and
IBM Web sites for installation information for Linux and Directory
Server 5.1, if necessary..."