Linux distributions are not supported by Windows 10S light. MS officials explain it for security needs. An analogical situation already concerns desktop programs as Adobe Photoshop, Chrome, etc. To run these programs one must use installation via Desktop Bridge tool (meaning MS OS Store). As we have informed, 10S is primarily focuses in particular on educational area. This OS is positioned as the most secure one. Therefore 10S allows apps installation exclusively from its OS Store.
Moreover, even if a program is received from the Store, it is not sure that utility will work with 10S version. Some kind of software is banned any case including all command line tools, shells and consoles. Indeed, such items work outside the UWP sandbox and therefore do not fit the security concept of 10S MS OS version.
As a result, Linux distros are not allowed for a light 10S issue. Despite the fact that Ubuntu, and others are distributed in 10th edition through OS Store, it will be impossible to use ones for S version.