UNIX for Beginners Questions & Answers

If you were in X11 and opened a GUI session, you may still have old credentials active e.g. cdi letting you as cdi open a new xterm, and it might save you as cdi should have sudo privilege, as you didnt change them...
That said going to single user mode is architecture and OS dependant... I see nowhere anything in your previous posts on this thread...

What operating system are you using? For Linux kernel based, please, state the version of the distribution.

Am using Trisquel 7, free system derived from Ubuntu

Trisquel does not have the root user account available (it is locked) as it inherits this feature from Ubuntu. The first user created has administrator privileges which it is invoked by placing the command sudo in front of the task that requires elevated privileges.
It will ask you for a password, and that password is your password as a normal user.
sudo -i will give you a session as if you were root (you see the classic # for root). The password asked is your normal user login credentials.

---------- Post updated at 11:28 AM ---------- Previous update was at 11:12 AM ----------

Do you mind to post the output of the following command which will display the groups you are part of?

Code:

id guest-mKNnW5

guest-rVMxCC@fuckup:~$ id guest-mKNnW5
id: guest-mKNnW5: no such user

---------- Post updated at 06:55 PM ---------- Previous update was at 06:31 PM ----------

My password did not let me in

Yeah, I thought that username you posted previously was reveling, but this confirms it, anyway. You are login in as a very limited guest user. That's why the name changes every time. You are not login as the normal user, the one you have to make in order to install the OS.

At this point, if you do not remember what that credentials were, you might need to try to recover it. However, I warn you that you might render the system unusable.

Here's a link from the Ubuntu camp. It should be about the same.

Have tried, however did not manage to see (recovery mode).

---------- Post updated at 08:03 PM ---------- Previous update was at 06:19 PM ----------

Have used a Trisquel 7 CD and can see the system that I cannot boot from.

I did

Code:

sudo mount /dev/sda6 /mnt
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys

However I cannot execute

Code:

sudo schroot /mnt

---------- Post updated at 08:38 PM ---------- Previous update was at 08:03 PM ----------

Now I have done

Code:

sudo dchroot /mnt /bin/bash

and getting

Code:

W: No chroots are defined in ‘/etc/schroot/schroot.conf' or ‘/etc/schroot/chroot.d'
E: default: Chroot not found