idmap_hash man page
idmap_hash — Samba's idmap_hash Backend for Winbind
The idmap_hash plugin implements a hashing algorithm used to map SIDs for domain users and groups to 31-bit uids and gids, respectively. This plugin also implements the nss_info API and can be used to support a local name mapping files if enabled via the "winbind normalize names" and "winbind nss info" parameters in smb.conf.
Specifies the absolute path to the name mapping file used by the nss_info API. Entries in the file are of the form "unix name = qualified domain name". Mapping of both user and group names is supported.
The following example utilizes the idmap_hash plugin for the idmap and nss_info information.
[global] idmap config * : backend = hash idmap config * : range = 1000-4000000000 winbind nss info = hash winbind normalize names = yes idmap_hash:name_map = /etc/samba/name_map.cfg
The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed.