I have 2 2300C computers one of which I want to install ubuntu Linux. I have a duo dock and all the accessories but no usb ports! I have found several usb to serial adapters but no serial to usb. Am I at a dead end? MarvWeide 2- duo 2300C 20th Anniversary Mac G4 1.25 DP mirror tower 2 Mac Minis Mac Pro 2.4 Powerbook G5 2.5 dp Tower Asus eeePC