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ubuntu忘记密码

Do these two things just to make sure:

mount -o remount,rw /

This first part remounts the root partition as read/write since it was only in read mode. It actually dismounts the root partition and then mounts it again as read/write.

Then do this:

chmod 640 /etc/shadow

Then do the sudo passwd USER. It should work after that. This part gives the correct permissions to the shadow file.

 

ubuntu忘记密码