9.2.9.4 Finding your network address

If you haven't recorded your IP address, it will be displayed by the ifconfig command on Unix or by the IPCONFIG command on Windows 95 and NT. (Check your manual pages for any options required by your brand of Unix: Sun wants ifconfig -a). You should see output similar to the following:

server% ifconfig -a 
le0: flags=63<UP,BROADCAST,NOTRAILERS,RUNNING > 
      inet 192.168.236.11 netmask ffffff00 broadcast 192.168.236.255 
lo0: flags=49<&lt>UP,LOOPBACK,RUNNING<&gt> 		
      inet 127.0.0.1 netmask ff000000

One of the interfaces will be loopback (in our examples lo0), and the other will be the regular IP interface. The flags should show that the interface is running, and Ethernet interfaces will also say they support broadcasts (PPP interfaces don't). The other places to look for IP addresses are /etc/hosts files, Windows HOSTS files, Windows LMHOSTS files, NIS, NIS+ and DNS.