On Thu, Mar 23, 2023 at 07:06:55AM +0800, Jeremy Ardley wrote: > I am the guilty party who had docker. I have not raised any issue about it. > The instance is not used any more and was an experiment in running nextcloud > on an arm server
Then perhaps you can enlighten me: why does anyone (Docker user or otherwise) need to write a shell script to list the IPv4 addresses of the local system's network interfaces? I can't think of any reasons other than "I want to update dynamic DNS" (for which a dhclient hook is better suited, with the new IP address being supplied in the environment), or "I need to use it to set up firewall rules", a topic with which I'll admit I'm not very experienced, but which doesn't seem particularly important on exposed servers. I would think you'd simply shut down all the services you don't want running, rather than leaving them in place but trying to block them with a firewall.
