There are several ways to look for an IP Address, and indeed to display the addresses, here are a few exaples.

From the command line:

      ifconfig

This will display all IP Addresses configured on al Interfaces, on a server this can be a long list that scrolls off the page, to stop the results scrolling of the page use:

      ifconfig |more

If you know the interface name, you can use that to show the IP details of just that interface:

      ifconfig eth0

This will give the details for a single interface only

If an interface is using DHCP, and you see no IP Address, then you might have a link issue, to check this you can use:

      ip link show
      ip link show eth0

We can use grep to filter out just the information we require:

      Show MAC address of an interface - ifconfig eth0 |grep HWaddr