nss_updatedb man page
nss_updatedb — cache name service directories in DB format
nss_updatedb nameservice [passwd⎪group]
The nss_updatedb program gathers entries from the specified nameservice and stores it into a local database in Berkley DB format. It can store passwd and group information.
nss_updatedb was written by Luke Howard <email@example.com>
This man page was written by Guido Guenther <firstname.lastname@example.org>.