Ctrl+C does not work in gnome-terminal

Try to do this

$ stty sane

and see if it fixes the problem, also check if the intr is set correctly using

$ stty -a

If you find that intr is set to something different than ^C, then you can also fix it by typing

$ stty intr ^v^c

Since it looks like a broken gnome-terminal configuration, you can try letting it restore the defaults using

mv .gconf/apps/gnome-terminal{,-BROKEN}

(You'll need to re-start the terminal to see the effects.)

If everything is fine after that, do a rm -rf .gconf/apps/gnome-terminal-BROKEN.

The default settings in gnome-terminal binds the Ctrl-C and Ctrl-V keys to emulate the copy-and-paste behaviour of Windows. It was meant to be a feature not a bug :)

To disable this, at the gnome-terminal,

1. navigate to Menubar -> Edit -> Keyboard Shortcuts
2. click on the Ctrl+C in the Shortcut Key column until you see New Accelerator....
3. press the Backspace or Delete key to disable the key binding
4. verify that Disabled now appear in the Shortcut Key column.

Note that this change will be immediately effective on all gnome-terminals.

Tip: gnome-terminal --show-menubar will force gnome-terminal to show the Menubar if it is not shown.