CentOS or RH (with sssd) with AD but no kerberos! (cert only): http://htfdidt.blogspot.fr/2014/06/centos-6-with-active-directory.html

Introduction: https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/SSSD-Introduction.html

Reference guide: http://www.redhat.com/rhecm/rest-rhecm/jcr/repository/collaboration/jcr:system/jcr:versionStorage/ae40084d0a052601783f1ea42715cdef/26/jcr:frozenNode/rh:resourceFile

In addition to redhat guide, there are tones of interesting links:

http://thornelabs.net/2014/01/30/authenticate-rhel-5-and-6-against-active-directory-on-windows-server-2008-r2-with-sssd-using-kerberos-and-ldap.html

http://www.chriscowley.me.uk/blog/2013/12/16/integrating-rhel-with-active-directory/

Troubleshooting SSSD: https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/SSSD-Troubleshooting.html

SSSD for SuSE (sles): http://www.novell.com/support/kb/doc.php?id=7014572