# service winbind stop
# service smb stop
* Clear the Samba Net cache:
# net cache flush
* Delete the Winbind caches:
# rm –f /var/lib/samba/*.tdb
# rm –f /var/lib/samba/group_mapping.ldb
* Start the Samba (if you have it) and then Winbind services:
# service smb start
# service winbind start