I don't know your distro, and you don't say which desktop you have, but both Gnome and KDE let you add or change a keyboard driver. In Gnome, you enter the menu under System - Preferences - Hardware - Keyboard. Look for the Canadian one! If you don't have a Canadian one (unlikely), try the US International.
Another thing you could do, at the same place in the menu, is enable a key (right Windows?) as a Compose key. Then you can use sequences (don't press them all at once) like
Compose + e + apostrophe for é
Compose + a + ^ for â
Compose + u + grave for ù
Compose + c + comma for ç
Last edited by DavidMcCann; 09-01-2008 at 12:20 PM.