How can I find and install Canon PIXMA MG2450 paquets ?
I've searched on Ubuntu web site but no result.

Edit :
I've found... and install after more than 5 hour of battle, using Terminal, Ubuntu forums and some craches and non-desired reboots.
The most difficult was to activate the scan function in Simple Scan.
Hint : Use MG 2400 printer type and Debian format.

This printer was a gift, but next time, for my boat, it will be another Brand than Canon because without Internet, no way to find drivers on the CD.

I've not spent as much time looking at this problem as you, but I did find this

https://forums.linuxmint.com/viewtopic. ... 1&t=186809

I'm told the 'normal' scan drivers don't work, and this is a work around.

OK, but as Eduardo posted, no notification :
When you install the canon printer driver with its installer (./install.sh) first, before you can register the printer, mint has installed it with its gutenprint driver, you only have the notification. In the manuals, they say that "if a window that prompts you to add a printer is automatically displayed when you connect the machine, cancel the window by closing it."

And for me, not experienced as you with Ubuntu, it was a long time to solve this installation.