http://www.omgubuntu.co.uk/2016/08/upgrade-bash-windows-10-ubuntu-16-04…
Ez adja:
sudo su
apt-get update
apt-get upgrade
apt-get dist-upgrade
apt-get autoremove
sudo do-release-upgrade -f DistUpgradeViewNonInteractive -d
As noted, it still gets stuck at a Y/N prompt. Pressed Ctrl+C and ran:
sudo -S dpkg --configure -a
apt-get update
apt-get upgrade
apt-get dist-upgrade
apt-get autoremove