Simple Command
./crunch <min> <max> <charset string> <option>
Example
./crunch 3 3 -t 08% -o /home/ak1/Desktop/test.txt
Output
080
081
082
083
084
085
086
087
088
089
Crunch && Aircrack-ng
Crunch with Aircrack-ng Cracking WPA / WPA2
crunch {min} {max} aknch1 | aircrack-ng '/root/file.cap' -w - -e {wifiname}