Ubuntu Driver Canon MX492 Download & Install
The linked Tutorials Show You Step-by-Step How to Download and Install Canon MX492 Ubuntu Driver Printer.
And included in the Canon MX492 Ubuntu Install Tutorial You find also detailed instructions to Getting-Started with Canon MX492 Scanner on Ubuntu.
Finally, these instructions are valid for all Canon PIXMA MX490 Printer Series models:
Canon PIXMA MX491, PIXMA MX492, PIXMA MX494,
Canon PIXMA MX495, PIXMA MX496, PIXMA MX497, PIXMA MX499.