The most important file is slapd.conf. it has some quick configs necisarry for testing.
the file etc.openldap.slapd.conf belongs at /etc/openldap/slapd.conf
install the packages if they are not already
yum -y install openldap-server openldap-clients
add the root dn
slapadd -v -l root.ldif
start the service
/etc/init.d/ldap start
add some test entries (service must be running)
ldapmodify -D "cn=Manager,dc=plainjoe,dc=org" -w secret -x -a -v -f users.ldif
remove them
ldapmodify -D "cn=Manager,dc=plainjoe,dc=org" -w secret -x -v -f remove_all.ldif
read them with slapcat
slapcat
or read them with a client tool
ldapsearch -x -b "dc=plainjoe,dc=org" "(objectclass=*)"