重置ubuntu13.04 密码

摘自国外论坛亲测可用：

1) Restart Machine 

2) HOLD Shift Button ( You will get message “GRUB Loading“)

3) Select the Kernel ( Don’t select Recovery Mode)

4) Press the e key to edit the entry

5) Select the line starting with the word “linux”

6) Append the init=/bin/bash to the end of the linux line.

7) Now Press F10 to boot with provided option.

Now You need to mount File System ( / ) into Read-Write Mode

8) mount -o remount,rw /

Now execute passwd command to Reset root password.

9) For root User passwd

Other User passwd <user-name>