[admars]

ctrl-ins copy
shift-ins paste
shift-del cut

they're the older copy/cut/paste commands, but are still in use in Unix/Linux/MS Windows

that doesn't really answer your question, make sure your keyboard is mapped to correct territory. You'd probably know though if that was teh case, as certain other shortcuts woudl be different, or shift and keys would be different. eg US keyboard shift 2 is @ etc

Another way you can copy and paste is highlight text as normal, and middle click to paste.