Getting a previously set up Linux distribution back up and running is a breeze.
Whatever the reason you regularly set up a WSL environment on Windows 10, if you're doing it often, then a more efficient method is to import a previously backed up distribution. Exporting a WSL distribution is easy and takes only a moment; likewise importing one from a .tar file is just as quick.
Here's what you need to know.
Full story from the WindowsCentral blog...