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Recovering from a lost root password
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JP
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PostPosted: Wed Jun 11, 2024 6:14 am    Post subject: Re: Recovering from a lost root password Reply with quote
crouse wrote:

Open a terminal window.
Code:
/mnt/hda1

then do
Code:
chroot /mnt/hda1



This won't work for me in Knoppix 5.3.1 Confused

Code:
root@Knoppix:/# /mnt/hda1
bash: /mnt/hda1: is a directory
root@Knoppix:/# chroot /mnt/hda1
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
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bash: /dev/null: Permission denied
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bash: /dev/null: Permission denied
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bash: /dev/null: Permission denied
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bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
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bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
                                         

And the prompt doesn't come back so I can do anything. So Dave, what am I doing wrong? Is it becuz I'm already root? Confused



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PostPosted: Sun Jun 15, 2024 7:25 am    Post subject: Reply with quote
it's
Code:
mount hda1


then the chroot



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JP
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PostPosted: Sun Jun 15, 2024 7:39 am    Post subject: Reply with quote
Thanks, but that doesn't work either, when I do
Code:
root@Knoppix:ranmdisk/home/knoppix# mount hda1
mount: can't find hda1 in /etc/fstab or /etc/mtab
root@Knoppix:ranmdisk/home/knoppix#


Maybe it's the Knoppix Confused



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Last edited by JP on Sun Jun 15, 2024 7:46 am; edited 1 time in total
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PostPosted: Sun Jun 15, 2024 7:41 am    Post subject: Reply with quote
Welcome. Smile



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JP
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PostPosted: Sun Jun 15, 2024 7:47 am    Post subject: Reply with quote
DedannaRocks! wrote:
Welcome. Smile
HUH??



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jester
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PostPosted: Sun Jun 15, 2024 8:52 am    Post subject: Reply with quote
JP to chroot from knoppix, please see the instructions in your sidux thread



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PostPosted: Mon Jun 16, 2024 5:03 am    Post subject: Reply with quote
JP wrote:
DedannaRocks! wrote:
Welcome. Smile
HUH??

Sorry, cross-post to your next post. I hadn't seen it yet.



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JP
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PostPosted: Tue Jun 17, 2024 4:32 am    Post subject: Reply with quote
DedannaRocks! wrote:
JP wrote:
DedannaRocks! wrote:
Welcome. Smile
HUH??

Sorry, cross-post to your next post. I hadn't seen it yet.


This wasn't a cross-post to my sidux thread, I was doing some CLI practice and found that this formula didn't work for me .... I guess I should have made that clear up front. Sorry!!



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masinick
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PostPosted: Tue Jun 17, 2024 10:59 pm    Post subject: Reply with quote
DedannaRocks! wrote:
it's
Code:
mount hda1


then the chroot


I would explicitly add the complete path, that is,
Code:
mount /hda1
, replacing hda1 with whatever the actual partition name happens to be. I think it would be sda1 if that is a sidux system, but KNOPPIX may still recognize it as hda1 - I know PCLinuxOS still uses hd naming conventions in PCLinuxOS 2024, even with packaging updates.



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PostPosted: Wed Jun 18, 2024 8:50 am    Post subject: Reply with quote
Sorry, forgot the / .

Try /dev/hda1



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JP
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PostPosted: Wed Jun 18, 2024 3:07 pm    Post subject: Reply with quote
I still get the same thing ....
Code:
root@Knoppix:/ramdisk/home/knoppix# mount /dev/hda1
root@Knoppix:/ramdisk/home/knoppix# /mnt/hda1
bash: /mnt/hda1: is a directory
root@Knoppix:/ramdisk/home/knoppix# chroot /mnt/hda1
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied


Code:
root@Knoppix:/ramdisk/home/knoppix# mount /dev/sda1
mount: can't find /dev/sda1 in /etc/fstab or /etc/mtab
root@Knoppix:/ramdisk/home/knoppix# /mnt/sda1
bash: /mnt/sda1: No such file or directory
root@Knoppix:/ramdisk/home/knoppix#


So my question still stands, is it possible it's the Knoppix /or the way I'm using Knoppix? I think Knoppix is already in root, but I "su" to make sure and then change the password (Thanks to Masinick for that tip), before I do all of this other stuff Wink
NOTE: this is the Knoppix 5.3.1 DVD that came with Linux Pro Magazine, and it has been working great, so I'm not trying to complain about the DVD, I'm wondering if there is a different sequence of commands that are used in a Knoppix mount than in a slax mount. In other words,

Code:
knoppix@Knoppix:~$ su
root@Knoppix:/ramdisk/home/knoppix# passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully


I think Knoppix is already in the root account.

Code:
knoppix@Knoppix:~$ pwd
/ramdisk/home/knoppix
knoppix@Knoppix:~$ whoami
knoppix
knoppix@Knoppix:~$ su
root@Knoppix:/ramdisk/home/knoppix# pwd
/ramdisk/home/knoppix
root@Knoppix:/ramdisk/home/knoppix# whoami
root
root@Knoppix:/ramdisk/home/knoppix#


You see, it doesn't ask for a password to change from "knoppix" to "root."



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jester
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PostPosted: Wed Jun 18, 2024 3:29 pm    Post subject: Reply with quote
did you try su - ?



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masinick
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PostPosted: Thu Jun 19, 2024 1:43 am    Post subject: Reply with quote
su is used to become another user during a login session. Invoked
without a username, su defaults to becoming the super user. The
optional argument - may be used to provide an environment similar to
what the user would expect had the user logged in directly.

As Jester suggests, using the - argument may prove useful in order to get the correct environment prior to using the chroot command. Give that a try and let us know what you get. Sure looks like your version of KNOPPIX still adheres to the hd rather than sd device naming convention. I am a bit rusty on the particulars, but I *think* it is udev that provides the new and different device naming convention.



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JP
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PostPosted: Thu Jun 19, 2024 4:46 am    Post subject: Reply with quote
Code:
knoppix@Knoppix:~$ su -
root@Knoppix:~# passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@Knoppix:~# pwd
/root
root@Knoppix:~# whoami
root
root@Knoppix:~# mount /dev/hda1
root@Knoppix:~# /mnt/hda1
-su: /mnt/hda1: is a directory
root@Knoppix:~# chroot /mnt/hda1
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied



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jester
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PostPosted: Thu Jun 19, 2024 11:34 am    Post subject: Reply with quote
JP wrote:
Code:
knoppix@Knoppix:~$ su -
root@Knoppix:~# passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@Knoppix:~# pwd
/root
root@Knoppix:~# whoami
root
root@Knoppix:~# mount /dev/hda1
root@Knoppix:~# /mnt/hda1
-su: /mnt/hda1: is a directory
root@Knoppix:~# chroot /mnt/hda1
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied

JP - that looks like progress up until the mount /dev/hda1; I strongly suggest that you review the chroot steps I posted in your sidux thread i.e. make a new mount point, mount that on /dev/hda1, make sure you also mount /mount/point/proc with the correct arguments all before you chroot /mount/point /bin/bash

why follow those steps? because they are part of the 'genuine' gentoo install and I know they work for recovery too

you are incredibly close
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