1） install aircrack-ng: sudo apt-get install -y aircrack-ng.

2） install reaver: sudo apt-get install -y reaver.

3) install gksu(please don't forget this): sudo apt-get install -y gksu.

4) install minidwep-gtk: sudo dpkg -i install **minidwep-gtk***.deb.

After the installing step is completed, you can start the minidwep-gtk: sudo minidwep-gtk. Then the output is like below:

*** a kind reminder ( install shutter on ubuntu: sudo apt-get install -y shutter)***