Standalone server (not domain controller).

Check there is no user called administrator (a new Stretch RPi thing?).

grep administrator /etc/passwd

Install shit.

apt-get update
apt-get install libcups2 samba samba-common cups smbclient

(About 100mb of stuff on Raspbian.)

nano /etc/samba/smb.conf

[global]
workgroup = PEAZONE

[homes]
read only = no

Leaving unix password sync = yes might fix the ancient smbadduser headaches? Syncing passwords is still a ballache, so

smbpasswd -a pi
# enter password

service smbd restart

[alito]
  path = /home/slack/alito
  valid users = slack
  writable = yes

[sonos]
  comment = All Users
  path = /home/slack/sonos
  valid users = slack
  create mask = 0660
  directory mask = 0771
  writable = yes

[huge]
   comment Huge
   path = /huge
   valid users = slack
   browseable = yes
   read only = no
   create mask = 0700
   directory mask = 0700