script or cmd to retun my ip address....

Hi,

I need a command or script to return my ip address by interface. I know u can see what it is by ifconfig, but I need just the ip address returned to dump in say...an environment variable, that i can later reference in a script. I tried "hostname -i" but it just returns the loopback address. I need to be able to get ip address for say eth0 or eth1. This would be on a redhat 9.0 box.

Thanks!!

What about:
/sbin/ifconfig eth0|grep inet|awk {'print $2'}|cut -d":" -f2

Hey that works. THX!! Consider yourself affero'd

Cheers Scrag, good to see it worked.

I never actually thought before but if it was your external IP and you are behind a firewall then you can also use:
lynx -dump http://www.whatismyip.com | awk '/^Your IP is/ { print $4; }'

this works too:

#!/bin/bash

lista="hostname1 hostname2"

for a in $lista
do
b=$(host $a | awk '{ print $4 }')
echo $b
done

Why is this so hard? I have 2 wireless nets and 2 NICs hooking the little oracle/freeciv Ubuntu server up. How does the person tell which ip they've hooked to? I put up a telnet server so the Windoze here at home can get to it without installing putty or cygwin. They can start networked freeciv games from a simple menu. Showing which IP they connected to, so they know which one to put in the Windoze freeciv client, should be trivial, but it isn't. I put a variable into the .profile for the captive id/menu I use to give control of freeciv. It contains the Shell PID. Here's the resulting kludge. Where is the 'who -whatipaddresdidIhit' option?


#!/usr/bin/ksh
# ---------------------------------------------------
# This kludge walks up the pid tree looking for the telnetd pid.
# It uses that pid to get the ip with lsof...I had to put setuid
# on lsof for this to work. Blechh!!
# ---------------------------------------------------
# NOTE: for the sed stuff, there is a <space><tab> inside the [ ]
# ---------------------------------------------------
PID_OF_INTEREST=$MyPID
while true
do
if ps -ef | grep "^[^ ][^ ]*[ ][ ]*${PID_OF_INTEREST}[ ][ ]*" | grep 'telnetd.*in.telnetd:' > /dev/null 2>&1
then
break
fi
PID_OF_INTEREST=$(ps -ef | grep "^[^ ][^ ]*[ ][ ]*${PID_OF_INTEREST}[ ][ ]*" | awk '{print $3}')
done

lsof -i4 -n | grep "$PID_OF_INTEREST" |
head -1 |
sed 's/.*[ ]\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\):telnet.*/\1/'