How do I know my MAC address?

Question

how to check mac address of our system through terminal in ubuntu 10.04LTS

ipconfig/all

Answer 1

For wired / wireless adapters

ifconfig |grep HWaddr 

For bluetooth adapters:

hciconfig

Answer 2

An alternative to ifconfig is the ip command. You can use ip addr to list all your network interfaces with their IP and MAC addresses:

ek@Ilex:~$ ip addr
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0:  mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:5a:35:6d brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.107/24 brd 192.168.1.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe5a:356d/64 scope link 
       valid_lft forever preferred_lft forever

I often use ifconfig myself, but ip seems to be the way of the future (on Linux-based OSes, such as Ubuntu).