BeagleBone Debian Machinekit image
Robert C. Nelson kindly provides a 2-weekly build of a complete Debian with Machinekit image for a BeagleBone Black/White.
Head over to elinux.org/Beagleboard:BeagleBoneBlack_Debian#BBW.2FBBB_.28All_Revs.29_Machinekit and download and install the image on a microSD card and run the image from that, or install the image on the eMMC.
Instructions on writing a microSD card can be found here by doing a Google search. There are plenty examples and tutorials around also for writing the image to the eMMC.