How to run a script when changing the ip address (most likely using the httclient hook) on a Linux machine (Ubuntu)?

Question

I have a script that contacts several sources and tells them that "The IP address XXX.XXX.XXX.XXX is my current." My test web server has a dynamic IP address via DHCP and, among other things, it needs to update the DDNS record when its IP address changes. However, this is not the only thing it does, so I will need to run my own script.

I suspect this is possible by attaching a script for a given dhclient hook. However, I still need to know which hook I should use, and how.

Answer 1

script dhclient-exit-hooks.d. DDNS, . , , dhclient-exit-hooks, .

: man (man dhclient- script) , - script (exit_status). .