How to get SQL Server on Linux?

In order to get SQL Server on Linux you need to go to the following page: https://www.microsoft.com/en-us/server-cloud/sql-server-on-linux.aspx. Click on the part where is says Sign up to stay informed and to apply for the preview. It will bring you to a signup page that looks like this

After you filled out all the information required you will have to wait for a reply. Be aware that currently the SQL Server on Linux preview is limited to Ubuntu or as a Docker image