Muhammad Bashir Al-Noimi wrote:

I installed OpenLDAP under Ubuntu 13.04 x64 by using the mentioned steps in this article ( http://edin.no-ip.com/blog/hswong3i/ldap-single-sign-webmin-ubuntu-12-04-how... ) the problem I've faced that my system cannot lookup Unix users in the LDAP database because I couldn't configure libpam-ldapd to enable Unix authentication, LDAP Authentication.

How can I fix this issue?

P.S.

I'm still a newbie with LDAP so forgive me for silly question. I tried to use dpkg-reconfigure libpam-ldapd but it didn't ask me anything!

I'd strongly recommend to follow OpenLDAP's admin guide instead of how-tos which uses obscure third-party tools. OpenLDAP community is not able to help you with those tools.

Especially webmin had a long history of security issues. Are you sure you want to use that?

Ciao, Michael.