Download 18.04 of Ubuntu in the Microsoft Store of windows, but there are some problems in SSH localhost. Refer to some information on the Internet and make the following summary

first, you need to install sshd sudo apt get install openssh server and then modify/etc/SSH/sshd_ Two items under config file
permitrootlogin yes permitrootlogin changed to yes passwordauthentication yes passwordauthentication changed to yes Restart SSH service /etc/init.d/ssh restart execute SSH localhost again input password should be able to SSH successfully