Lost or forgotten Root Password in Pisi Linux   Leave a comment

Lost or forgotten Root Password

While we all know we should always choose a root password that is too difficult to guess, yet easy enough to remember, occasionally you may find yourself sitting at a box and you don’t have the root password (anymore).

While it is not possible to *retrieve* the password for root, luckily it is possible to *change* it without knowing the current password.

First Method:

If you can log on as a user who has administrative rights (as asked and recommended during Pisi Linux install), then it is quite easy to change the root-password.

Open Konsole (Menu > System > Konsole and type

sudo su

Type your own password and press Enter.

Either the cursor is next to a pound sign (#), or you get a message that you are not in the sudoers list and the cursor is next to a dollar sign ($)

If you see the pound sign, then… 

Type: passwd 
Enter and confirm a new password.
All done. 
But if still have the dollar sign then head on over the…

Second Method:

Start or restart the computer. When grub appears, press the Escape key. You may need to be quick! A window will pop up, saying,

You are leaving the graphical boot menu and starting the text mode interface.

  • There are two buttons, „OK“ and „Cancel“. Even though there is no mouse support, the OK-button is pre-selected, so just press Enter.
  • You will see your Grub menu entries in text mode. If necessary, using the up and down arrow keys highlight the Pisi Linux entry.
  • Press „e“ — you will now see the grub entries that Grub uses for actually booting Pisi Linux.
  • Using the arrow keys, select the line that begins with „kernel“.
  • Press „e“ again — by default the cursor will be at the very end of this line. If not, use the arrow keys to navigate to the end of the line.
  • Add a space, then append the following:

 single init=/bin/bash

Press Enter to save the changes. You will be returned to the previous screen.
Press „b“ to boot Pisi Linux. After a few seconds you will see (none) / #

Type the following:

 mount -o remount,rw /

Type: passwd
Enter the new password when asked. The computer should respond with,

passwd: password changed successfully

Type: 

reboot

When the logon screen appears, log on as a regular user, or, if you don’t know that password either, press CTRL+ALT+F1 and log on as root. Then type „passwd “ and change the password for the user.

Compliations:

  • You cannot get Grub into text mode (nothing happens or you are asked for a password)
  • When you press the „e“ key in order to edit the Grub menu item for Pisi Linux, nothing happens or you are asked for a password.

In either case press „p“ and see if you are then asked for a password. If so, then Grub is password protected and you will need a live-cd to boot from.

  • When booted, open a terminal and become root (type: su)
  • Type „cfdisk /dev/sda“ (or “ /dev/sdb“, or “ /dev/sdc“, etc.)
  • Look which name corresponds with the label „Pisi_ROOT“. (Let’s say for example of the argument it happens to be „sda1“)
  • Press „q“ to quit cfdisk.
  • Type: mkdir /mnt/sda1
  • Type: mount /dev/sda1 /mnt/sda1
  • Type: nano -w /mnt/sda1/boot/grub/grub.conf
  • Look for and delete lines beginning with, „lock“ and „password“.
  • Press CTRL+X to quit nano (and don’t forget to save).
  • Continue with the Second Method,

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Veröffentlicht 10. Oktober 2014 von groni in Allgemein

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