The Windows Subsystem for Linux is now available in Windows Insider builds of Windows Server.
Recent Windows Subsystem for Linux Stories
The version of the Windows Subsystem for Linux that ships with the Fall Creators Update will be a fully supported Windows 10 feature.
Ubuntu Linux is now available to those using newer builds of the Windows 10 Insider Preview as well.
Two SUSE Linux environments---Linux Enterprise Server 12 and openSUSE Leap 42---are now available in newer Windows 10 Insider Preview builds.