Upgrading WSL in Windows 10

If you would like to update WSL in Windows 10 you can do very easily because WSL is based on a Ubuntu standard installation.

To perform an upgrade to the latest version simply execute the following commands inside your bash.

$ sudo -S apt-mark hold procps strace sudo
$ sudo -S env RELEASE_UPGRADER_NO_SCREEN=1 do-release-upgrade

source: Updating WSL — Windows Subsystem for Linux Guide documentation