SSH

It was slightly difficult for me to follow along with Bud on Tuesday when we were going through everything in class. I am not having any problems working with Oracle or actually producing XML, but in the process of getting to that point. I am still confused with SSH and how exactly it works. Bud kept using the command "cd" followed by something else. I don't know what "cd" means and where all the information we were getting comes from. Were the "Webapps" folder and such set up prior to starting the class?