IP -> e-mail

Robert Huff roberthuff at rcn.com
Wed Jun 6 13:17:52 UTC 2012

Matthias Apitz writes:

>  > Let say my computer is connected to the internet with a cable
>  modem and has a dynamic IP address via DHCP. This address is
>  refreshed after every random days.
>  > I want to know the new address even when I'm not home. Like
>  send an e-mail with the new IP, I already know how to do this,
>  but how can I track the event when my computer receives the new
>  IP?
>  Run this in a cronjob:
>  lynx -dump myip.nl | fgrep 'WAN IP'
>  strore the result in a file and when it changes, trigger a mail;

	Or, using only tools in the base system:

ifconfig | head | grep "inet " | awk '{print $2}'

				Robert Huff

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