The VM has installed ubuntu and forgets the password to fix the problem.

The VM has installed ubuntu and forgets the password to fix the problem. 1. Restart ubuntu and press "shirft" to go To the grub menu. 2. Select "recovery mode" and press "e" to go to the editing page; 3. Replace ro single with rw single init =/bin/bash; www.2cto.com 4. Press ctrl + x to enter the single-user mode. The current user is root; 5. Modify the sudoers permission in the/etc directory: chmod 0440 sudoers. You can also add the root password at the same time, which will not be so troublesome next time. 6. Press ctrl + alt + del to restart;