Sorry for Windows User!
I’ve faced with grub error on my ubuntu so that makes me busy.
Aircrack-ng is an 802.11 WEP and WPA-PSK keys cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, as well as the PTW attack, thus making the attack much faster compared to other WEP cracking tools.
In fact, Aircrack-ng is a set of tools for auditing wireless networks.