우분투 싱글모드 root 암호 잊었을때 > 명령어모음 cmd.kr

The Standard Way

 This procedure gives you a full root shell! You can damage your system if you are not careful!

1. When booting up press ESC at the grub prompt and use the arrow keys to select the rescue mode option and press enter.

2. This will boot the system in rescue mode and you should arrive at a prompt that looks like this

   • root@something

3. To reset your password type this in

   • passwd <username>

     and then enter you new password.
4. Once you are done resetting your password you can than switch back to the normal GUI mode by putting this in

   • init 2

If if appears to boot normally, but you see a message that says:

• Give root password for maintenance (or type Control-D to continue):

then you will have to try a different trick below.

The Other Way

If the "Standard Way" does not work for you and you recieve the "Give root password for maintenance" message, you can recover your password using the following steps

1. Reboot your computer

2. Press ESC at the grub prompt.

3. Select your image.

4. Highlight the line that begins kernel and press 'e' to edit

5. Go to the very end of the line, change the ro to rw and add init=/bin/bash

press enter, then press b to boot your system.

Your system will boot up to a passwordless root shell.

6. Type in passwd username

7. Set your password.

8. Type in reboot