On Kali Linux (Ubuntu)

1. apt-get install macchanger
2. macchanger –help to see usage
3. ifconfig wlan0 down (Take down interface)
4. # macchanger -r wlan0
Permanent MAC: 00:24:d7:97:75:18 (Intel Corporate)
Current   MAC: 00:24:d7:97:75:18 (Intel Corporate)
New       MAC: 0c:cc:88:d6:9e:71 (unknown)
5. ifconfig wlan0 up (up interface)
6. admire you’re new MAC Address: inet addr:10.0.1.20  Bcast:10.0.1.255  Mask:255.255.255.
or, you can get creative so the log review has something interesting to look at
7. # macchanger  –mac DE:AD:BE:EF:CA:FE wlan0

root@kali:~# macchanger  –mac DE:AD:BE:EF:CA:FE wlan0
Permanent MAC: 00:24:d7:97:75:18 (Intel Corporate)
Current   MAC: 0c:cc:88:d6:9e:71 (unknown)
New       MAC: de:ad:be:ef:ca:fe (unknown)

root@clamsTV:/etc/default# macchanger –help
GNU MAC Changer
Usage: macchanger [options] device

-h,  –help                   Print this help
-V,  –version                Print version and exit
-s,  –show                   Print the MAC address and exit
-e,  –ending                Don’t change the vendor bytes
-a,  –another                Set random vendor MAC of the same kind
-A                            Set random vendor MAC of any kind
-p,  –permanent              Reset to original, permanent hardware MAC
-r,  –random                 Set fully random MAC
-l,  –list[=keyword]         Print known vendors
-m,  –mac=XX:XX:XX:XX:XX:XX
–mac XX:XX:XX:XX:XX:XX  Set the MAC XX:XX:XX:XX:XX:XX