[Samba] classicupgrade

[Robert Moskowitz]

I have a Samba 3.6 PDC (ClearOS) that I want to migrate to Sernet Samba 
4.2 AD on a Centos7-arm box.

So I am reading:

https://wiki.samba.org/index.php/Migrating_a_Samba_NT4_domain_to_a_Samba_AD_domain_%28classic_upgrade%29

And trying to figure out what files I need.  Note this is a totally NEW 
box, I need to copy over the needed files.  So do I move all of the .tdb 
files?  There are actually 2 secrets.tdb:

/var/clearos/framework/tmp/secrets.tdb
/var/lib/samba/private/secrets.tdb

Do I need to stop smb and nmb services on the old server before copying 
the files?  Going to rsync the files over.

What about the conf files in /etc/samba?  Do I need my old smb.conf?

Security on the old system is users (unix login, never really liked 
that).  Can I change that and to what?

I assume I need to have BIND set up first.  And DHCPD?

Definitely need to fix some things on the box before I try the upgrade.

And if I get it wrong the first time, that is not a problem.  I will be 
trying this a number of times anyway, as Centos7-arm is not even up to 
beta yet.  But the beta could go fast once they get the build process 
working.