reset-the-password-in-ubuntu-linux-bash-in-windows

gistfile1.txt

https://askubuntu.com/questions/772050/reset-the-password-in-ubuntu-linux-bash-in-windows

    Close Bash on Ubuntu if it is running (or the next command will fail).

    In Windows admin command prompt (Super+X, A) change the default user to root:

    ubuntu config --default-user root

If you are using Ubuntu 18.04 in WSL, the command has changed to ubuntu1804 , so

ubuntu1804 config --default-user root

    Now Bash on Ubuntu on Windows logs you in as root without asking password

    Use passwd command in Bash to change the user password (the user whose password you want to reset):

    passwd your_username

    Change the default user back to your normal user in Windows command prompt

    ubuntu config --default-user  your_username