probleme avec zoneedit et mis a jour d'ip

salut a tous

j'ai un nom de domaine et j'ai pris le service zoneedit pour metre a jour mes DNS mais il ne le faite pas car je ne sais pas trops ou metre une commande

voila se qu'il dise:

UNIX Clients:

DDClient 3.0 is a Perl client used to update dynamic DNS entries for accounts on many dynamic DNS services. You can get it here: http://ddclient.sourceforge.net/.
IPCheck has built in support for popular CABLE/DSL NAT routers. It works on OS/2 as well as most Unix's. Source code & documentation is here: http://zoneclient.sourceforge.net/. Python is required.
From one of our customers: It's very easy to update the dynamic zoneedit entries on UNIX with either of these two command lines (if you have wget or lynx installed):
lynx -source -auth=username:password 'http://dynamic.zoneedit.com/auth/dynamic.html?host=www.mydomain.com'

wget -O - --http-user=username --http-passwd=password 'http://dynamic.zoneedit.com/auth/dynamic.html?host=www.mydomain.com'

PPP users should place one of the above commands (or a perl client) in the file /etc/ppp/ip-up or /etc/ppp/ppp.linkup, which are called whenever a ppp connection is made.

Users of dhcpcd may place these commands in the file /etc/dhcpc/dhcpcd-eth0.exe or /etc/dhcpc/dhcpcd-eth1.exe which are executed whenever a new dynamic IP address is acquired.

http://www.zoneedit.com/doc/dynamic.html

et je ne sais pas quoi metre comme commande dans se fichier /etc/ppp/ip-up

merci de m'aider A++