After performing the regular update of my Ubuntu 10.04.1, and a reboot (because kernel update), I opened a terminal window and entered
$ su - Password: su: Authentication failure $ $ su - Password: Added user root. #
(First I entered a wrong password (I think))
I do that all the time but this is the first time I get
Added user root.
Does somebody know from where does this message come? Should I worry?