Been wanting to learn Linux for a long time. I was given an Unbunto 12.04 machine that no one could get into to play with. I have srtarted the recovery mode and was able to change the root password. During that process I used mount -o ,rw /. I was successful. However, there is not a root option to login on the start up screen. So, where that is cool and all I'm still stuck. I attempted to change the password of the account that is there. However, I get authentication token manipulation error. The solutions I find are to do the mounting step I already did. When I do it,it states the error in the title. How do i get around this?