- 重启ubuntu,随即长按shift进入grub菜单
- 选择advanced operation...中的recovery mode回车确认
- 在Recovery Menu中选择"Root Drop to root shell prompt"回车确认
- 在root下输入:mount -o remount,rw /
- passwd username
https://askubuntu.com/questions/57620/getting-an-authentication-token-manipulation-error-when-trying-to-change-my-us https://blog.csdn.net/prince_jun/article/details/22507421