apt-cache show samba
This package provides the components necessary to use Samba as a
stand-alone file and print server. For use in an NT4 domain or Active
Directory realm, you will also need the winbind package.
This package is not required for connecting to existing SMB/CIFS servers
(see smbclient) or for mounting remote filesystems (see cifs-utils).
apt-cache show samba4
These packages contain snapshot versions of Samba 4, the next-generation
version of Samba. These should be considered _experimental_, and should
not be used in production.This package contains the main daemon.