I want that my right alt `AltGr` behaves as my left control `Control\_L` in linux virtual console.

I use the `showkey` utility and found out that pressing `AltGr` generates keycode `100`. So I wrote a rebind.map file with this line: 

```
keycode 100 = Control

```

And then I've loaded this configuration with `loadkeys $(readlink -f rebind.map)`

So If I press `AltGr` + `c` it should produce the same result as `Control`+`c`. And it does, on the first press. On the second press, the keyboard becomes unusable. 

How do I correctly bind my `AltGr` to behave as `Control\_L` in linux virtual console?