How do I find out my IP address on a unix-like box?

Question

How do I find out my IP address on a unix box? I've tried

ifconfig

but it doesn't exist on the system.

Answer 1

ifconfig is usually in /sbin. Depending on what system you're running this mightn't be on your path (in particular, RedHat systems don't include this on the default path)

Try:

$ /sbin/ifconfig

If it works then that's the issue, and you should change your path via your .bashrc (or whatever shell you're using).

export PATH=$PATH:/sbin:/usr/sbin

Answer 2

I would suggest looking at the host command. Of course, you will have to specify the name of the machine that you are on.

Answer 3

If you are behind some sort of NAT device, that device probably has an http interface that provides this information. First, find out its IP address either from the documentation or from the output of the route command. There should be a line that looks like this:

default         192.168.2.1     0.0.0.0         UG    0      0        0 ath0

Then connect to that IP address with your browser and see what you can find out. The rest depends on what kind of NAT device you're using.