And I’ve got it.
Glenn Berry posted a a link to the MSDN blog and almost immediately a note that the link was still the CTP. I decided to fire up my Ubuntu install and check. No updates there, though a few people reported Docker had the new bits.
A short while later, the Windows link was correct, and my Linux update worked.
I did re-register the repository
curl https://packages.microsoft.com/config/ubuntu/16.04/mssql-server.list | sudo tee /etc/apt/sources.list.d/mssql-server.list
And then the rest was the same as previous updates. Quick and easy, a few command line things to type and I was updated.
Now I need to get Docker working, since I’m betting we’ll see updates and changes there faster than anywhere else.
Voice of the DBA 
Are you planning to run docker on windows, linux or both platforms?
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Both. I think Docker makes more and more sense for everywhere (or the idea of containers). The update is easy on Linux, and I’ll keep my SSoL/U but I’d like to get containers running as well.
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