PowerShell DSC for Linux has moved out of CTP and v1 is available for download from http://www.microsoft.com/en-us/download/details.aspx?id=46919
You will find more details at http://blogs.msdn.com/b/powershell/archive/2015/05/06/powershell-dsc-for-linux-is-now-available.aspx
You will need to download OMI version 1.0.8-1 which is available from https://collaboration.opengroup.org/omi/documents.php?action=show&dcat=&gdid=32721
OMI has to be installed on the Linux box before the DSC package
A useful getting started guide is available https://technet.microsoft.com/en-us/library/mt126211.aspx
I demonstrated DSC for Linux at the recent PowerShell Summit NA 2015
though things have changed a bit since I built that demo environment using the DSC for Linux CTP. I’m going to rebuild my Linux box with the new bits and give it a whirl.
Being able to manage Windows and Linux environments through the same techniques, and in some cases the same DSC configurations is a big step forward