As someone who has been working with them on pushing this live for the last 6 months I can tell you, we're all very excited to finally push this public preview
I signed up early on as I have an old OSS project that supports MySQL/PostgreSQL and MSSQL. I had originally tried to set up a full CI environment using Vagrant, but automating the Windows/SQL part became so much of a pain I gave up on it.
I'm really thankful that they released Docker containers!! I was planning on moving the entire CI system to Docker anyway and this totally fits in, plus it's super easy to accept the EULA and run the evaluation container.
The linux tools seem to rely on a custom version of unixODBC. There is a binary rpm on the microsoft repo, but no source rpm. This seems to be contrary to the unixODBC license.
It's just the relational engine for now, no SSIS, SSAS, or SSRS. If you want to see more capabilities on Linux, I'd open a Connect item or search for an existing one and share it back here so people can vote.
