How To Find Mac Address In Windows 8

FREQUENTLY ASKED QUESTIONS (Windows 8)
Q: How to find NIC card Mac Address in Windows 8 ? 

Steps to find the MAC Address of NIC cards in Microsoft Windows 8 Operating System

Step1: Go to "Run" (At any time press WinKey + R)
and Run "ipconfig /all"

Click on screen-shot to enlarge

Know MAC address of Other computers in the same network in Windows 8
Go to Run
Type "arp -a" and press Enter key.
C:\>arp -a

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Change Mac address in Ubuntu: How to Change Mac Address In Ubuntu linux

FREQUENTLY ASKED QUESTIONS (Ubuntu)
Q: How to change mac address in Ubuntu Linux? (Mac spoofing)                                     Mac spoofing

Mac spoofing is changing a factory assigned Mac address (Media Access Control Address)  of an ethernet device. You can change the mac address of your NIC card by following the steps below

How to know mac address of a device

user@ubuntu:~$ ifconfig -a | grep HWaddr

eth0      Link encap:Ethernet  HWaddr 00:E0:4D:A0:6A:4A

Change Mac address of a device

user@ubuntu:~$ sudo vi /etc/network/interfaces 

iface eth0 inet static                    #(you may see this line if eth0 have a static ipaddress) 

hwaddress ether a1:b2:c3:d4:e5:f6    #(add this line, new mac address for eth0)

#(Save the "interfaces" file)

Restart networking to take effect new Mac address

user@ubuntu:~$ sudo /etc/init.d/networking restart

* Reconfiguring network interfaces...                                 [ OK ]

Verify new Mac address

user@ubuntu:~$ ifconfig -a | grep HWaddr

 eth0      Link encap:Ethernet  HWaddr a1:b2:c3:d4:e5:f6

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