LDAP is supported by numerous servers being the knownest Directory Active of Microsoft, eDirectory of Novell, Oracle Internet Directory of Oracle, iPlanet Directory Server of SUN and finally but not less important openLDAP.
This manual teach about the use and installation of openLDAP, since this supported by practically all the distributions of linux and their license fulfills the openSource standard.
For more information about LDAP see LDAP Linux HowTo[9], Using LDAP[10], openLDAP administrator Guide[11] and in Spanish the LDAP relative part of the magnify manual Ldap+Samba+Cups+Pykota[12].