How To: Linux / Unix Move Directory Up One Level

Originally published at: https://www.cyberciti.biz/faq/linux-unix-appleosx-bsd-move-directory-uponelevel/

I would like to move a directory one level up into the root directory. I have all my html files located in /home/apache2/www/html directory, and I would like to move /home/apache2/www/html to one level up at /home/apache2/www/. How can I accomplish this over the ssh session?