apt-get install samba smbfs

After installation, modify the /etc/samba/smb.conf file and set up your file shares.

Find this section in the file:

  ####### Authentication #######
  # "security = user" is always a good idea. This will require a Unix account
  # in this server for every user accessing the server. See
  # /usr/share/doc/samba-doc/htmldocs/Samba-HOWTO-Collection/ServerType.html
  # in the samba-doc package for details.
  ;  security = user

Uncomment the security line, and add another line to make it look like this:

  security = user
  username map = /etc/samba/smbusers

This will set Samba to use the smbusers file for looking up the user list.

There are two steps to creating a user. First we'll run the smbpasswd utility to create a samba password for the user.

  sudo smbpasswd -a <username>

Next, we'll add that username to the smbusers file.

  sudo vim /etc/samba/smbusers

Add in the following line, substituting the username with the one you want to give access to. The format is <ubuntuusername> = “<samba username>”. You can use a different samba user name to map to an ubuntu account, but that's not really necessary right now.

  <username> = "<username>"

Now you can create samba shares and give access to the users that you listed here.