1. sudo lshw -C network | grep -i serial
lshw - Command used to list the details of all available hardware in a system.
-C - Option used to specify hardware "class".
network - We asked "lshw" to list only the network devices.
grep - Command used to print lines that matches the given pattern
-i - Option used to ignore case sensitivity
serial - Pattern used to fetch the lines that contains the word "serial"
Example:
$sudo lshw -C network | grep -i serial
[sudo] password for
serial: 78:f2:9e:f3:88:e7
2. /sbin/ifconfig | grep -i hwaddr or sudo ifconfig | grep -i hwaddr
ifconfig-Command used to configure network devices.
grep - Command used to print lines that matches the given pattern
-i - Option used to ignore case sensitivity
serial - Pattern used to fetch the lines that contains the word "serial"
Example:
$/sbin/ifconfig | grep -i hwaddr
eth0 Link encap:Ethernet HWaddr 78:f2:9e:f3:88:e7
3. GUI Way
Applications -> System Tools -> Settings
You will land in the following screen
 | |||
| Settings panel |
Click on Network the following window will be open
 |
| Network settings panel |
The green highlighted part is our interest.
