libnss-winbind 2:4.12.5+dfsg-3ubuntu3 (amd64 binary) in ubuntu groovy

 Samba is an implementation of the SMB/CIFS protocol for Unix systems,
 providing support for cross-platform file and printer sharing with
 Microsoft Windows, OS X, and other Unix systems. Samba can also function
 as an NT4-style domain controller, and can integrate with both NT4 domains
 and Active Directory realms as a member server.
 .
 This package provides nss_winbind, a plugin that integrates
 with a local winbindd server to provide user/group name lookups to the
 system; and nss_wins, which provides hostname lookups via both the NBNS and
 NetBIOS broadcast protocols.