Now that we've captured the handshake, all we need to do is crack the WPA key by creating a wordlist. A wordlist is just a list of words that aircrack-ng is going to go through, trying each one against the handshake until it successfully determines the WPA key. The better your wordlist is, the higher your chances of cracking the WPA key will be. If the password isn't in your wordlist file, you will not be able to determine the WPA key.
We're going to use a tool called crunch. It's basically just a script; we specify the characters that we want in the passwords, and it creates all possible combinations of these passwords. The format of the command for using crunch is crunch [min] [max]. The [min] is the minimum number of characters of the password that we want to create, we can say that we want a minimum of four, five, six, and so on. The...