Methods
1. Enter the ubuntu grub pattern, my computer card on this page, if you don't, then pressing the shift or e, into the gnu grub version page,
2. Select the Advanced options for Ubuntu, press the return key
3. Choose one of the most depend on recovery mode, press the e key to enter the edit page
4. The third from bottom line "ro recovery nomodeset" (I close, don't delete ro has the same effect) directly into a "quiet splash rw init=/bin/bash"
5. Press CTRL + x or F10 to boot page
Passwd 6. Input the user name, such as passwd alicexuuu, to change the user's password, (if you forget what's user, input before you in this cat/etc/shadow check)
7. According to the prompt for password twice, and finally suggests you successfully! 就成功啦,然后按alt+ctrl+delete去重启电脑,大功告成
