Find IP address in Linux Operating System

The best way to look up your Linux IP address if you are new  to Linux is by utilizing the bash shell command. By typing the ‘ifconfig’ command you will get useful data such as the IP address and its corresponding mac address, the subnet mask and other handy information too. The best way to look up your Linux IP address is by utilizing the bash shell command. By typing the ‘ifconfig’ command you receive useful data such as the IP address and its corresponding mac address, the subnet mask and other handy information too.

 Here's the code:

/sbin/ifconfig \
   | grep '\<inet\>' \
   | sed -n '1p' \
   | tr -s ' ' \
   | cut -d ' ' -f3 \
   | cut -d ':' -f2

This will give you the IP address, in order to get the mac address then refer to the code below.

/sbin/ifconfig \
   | grep 'eth0' \
   | tr -s ' ' \
   | cut -d ' ' -f5

I believe that this will help you out,should you need further assistance i suggest you visit http://www.linuxjournal.com.