System Challenges (Administrative Rights)

Please change the user password please read the already answered questions and/or faq

https://answers.launchpad.net/ubuntu/+source/shadow

The challenge is that I do not have the password to the administrative user so how do I go about changing the password I do not know?

You don't need it. Reboot and hold SHIFT and select recovery mode, then select root. You can now run:

ls /home

You will see username (lost+found may be there and is not a user), you can now run:

passwd foo; reboot

Replace foo with your username Eg:

passwd andy; reboot

You can now log in as youruser with the new password. I suggest you contact the old users and tell them the steps you took and that you could have avoided them if they'd told you what you needed.

I tried but couldn't get the rightful procedure. I would appreciate a more detailed step by step process of doing it.

That is step by step. Reboot the system and as soon as the system powers up, hold SHIFT

The above is step by step, I cannot put it more succinctly shoort of putting:

press L
Press S

Which is pretty pathetic.

The challenge is it is not accepting the password for the root option you asked me to select earlier.

there is no password entry, the root recovery mode doesn't have a pasword as there isn't one set.