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+.. _ldap_be_ubuntu:
+
+LDAP backend on Ubuntu 10.4 (lucid)
+===================================
+
+Setting up Kerberos v1.9 with LDAP backend on Ubuntu 10.4 (Lucid Lynx)
+
+
+Prerequisites
+-------------
+
+Install the following packages: *slapd, ldap-utils* and *libldap2-dev*
+
+You can install the necessary packages with these commands::
+
+    sudo apt-get install slapd
+    sudo apt-get install ldap-utils
+    sudo apt-get install libldap2-dev
+
+Extend the user schema using schemas from standart OpenLDAP
+distribution: *cosine, mics, nis, inetcomperson* ::
+
+    ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/cosine.ldif
+    ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/mics.ldif
+    ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/nis.ldif
+    ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/inetcomperson.ldif
+
+
+Building Kerberos from source
+-----------------------------
+
+::
+
+    ./configure --with-ldap
+    make
+    sudo make install
+
+
+Setting up Kerberos
+-------------------
+
+Configuration
+~~~~~~~~~~~~~
+
+Update kdc.conf with the LDAP back-end information::
+
+    [realms]
+        EXAMPLE.COM = {
+            database_module = LDAP
+        }
+
+    [dbmodules]
+        LDAP = {
+            db_library = kldap
+            ldap_kerberos_container_dn = cn=krbContainer,dc=example,dc=com
+            ldap_kdc_dn = cn=admin,dc=example,dc=com
+            ldap_kadmind_dn = cn=admin,dc=example,dc=com
+            ldap_service_password_file = /usr/local/var/krb5kdc/admin.stash
+            ldap_servers = ldapi:///
+        }
+
+
+Schema
+~~~~~~
+
+From the source tree copy
+``src/plugins/kdb/ldap/libkdb_ldap/kerberos.schema`` into
+``/etc/ldap/schema``
+
+Warning: this step should be done after slapd is installed to avoid
+problems with slapd installation.
+
+To convert kerberos.schema to run-time configuration (``cn=config``)
+do the following:
+
+#. Create a temporary file ``/tmp/schema_convert.conf`` with the
+   following content::
+
+       include /etc/ldap/schema/kerberos.schema
+
+#. Create a temporary directory ``/tmp/krb5_ldif``.
+
+#. Run::
+
+       slaptest -f /tmp/schema_convert.conf -F /tmp/krb5_ldif
+
+   This should in a new file named
+   ``/tmp/krb5_ldif/cn=config/cn=schema/cn={0}kerberos.ldif``.
+
+#. Edit ``/tmp/krb5_ldif/cn=config/cn=schema/cn={0}kerberos.ldif`` by
+   replacing the lines::
+
+       dn: cn={0}kerberos
+       cn: {0}kerberos
+
+   with
+
+       dn: cn=kerberos,cn=schema,cn=config
+       cn: kerberos
+
+   Also, remove following attribute-value pairs::
+
+       structuralObjectClass: olcSchemaConfig
+       entryUUID: ...
+       creatorsName: cn=config
+       createTimestamp: ...
+       entryCSN: ...
+       modifiersName: cn=config
+       modifyTimestamp: ...
+
+#. Load the new schema with ldapadd (with the proper authentication)::
+
+       ldapadd -Y EXTERNAL -H ldapi:/// -f  /tmp/krb5_ldif/cn=config/cn=schema/cn={0}kerberos.ldif
+
+   which should result the message ``adding new entry
+   "cn=kerberos,cn=schema,cn=config"``.
+
+
+Create Kerberos database
+------------------------
+
+Using LDAP administrator credentials, create Kerberos database and
+master key stash::
+
+    kdb5_ldap_util -D cn=admin,dc=example,dc=com -H ldapi:/// create -s
+
+Stash the LDAP administrative passwords::
+
+    kdb5_ldap_util -D cn=admin,dc=example,dc=com -H ldapi:/// stashsrvpw cn=admin,dc=example,dc=com
+
+Start :ref:`krb5kdc(8)`::
+
+    krb5kdc
+
+To destroy database run::
+
+    kdb5_ldap_util -D cn=admin,dc=example,dc=com -H ldapi:/// destroy -f
+
+
+Useful references
+-----------------
+
+* `Kerberos and LDAP <https://help.ubuntu.com/10.04/serverguide/C/kerberos-ldap.html>`_