I don't have a password to log in to Ubuntu at the start but if the computer sits for too long it turns partly off and moving the mouse starts it up again. I am prompted with a password and I enter it and all is going again, this password will not work when I try to install Krusader via "Ubuntu Software".
I still have a lot of reading and learning to do yet, the book pointed to this button and thought I'd give it a try on something I want to install.
Thanks.