Dyndns in Ubuntu/Debian

In Debian/Ubuntu you can install an IP updater via apt:

sudo apt-get install ipcheck

For dyndns use the following syntax:

ipcheck -r checkip.dyndns.org:8245 \
$USERNAME $PASSWORD $HOSTNAME

Of course, you may find it more useful to create a script which runs automatically via cron.

For details refer to the original article:

http://blog.patrick-morgan.net/2007/05/dyndns.html