I have a dell optiplex 755 usff that I have setup to use with a new os. I don't have any dvd's currently at the moment so i'm stuck with cd's for right now which can hold 700 MB and I want it to be compatible with my dell optiplex 755 usff, for being able to do anything that a windows os can do. Any suggestions on what I can do?
You can start with a mini ISO, which is only about 50MB, and installs a command line base system. Once that is installed, you can then install any DE you like.
None of the other Ubuntu images I've seen will fit on a 700MB CD.