> In my case, "ifconfig enp4s0" shows a line like this:
>   inet6 fe80::4687:fcff:fe9e:4ac7 prefixlen 64 scopeid 0x20<link>

this is normal, when ipv6 is enabled; all interfaces get a link-local
address.

> run "host $(hostname)" and it is likely to return...the link local
inet6 address.

Your assumption that systemd-resolved will perform $(hostname)
resolution to the system's ipv6 link local addresses is wrong; it
doesn't do that, unless you've configured things that way.  If your
system does do that, something else is going on.  Can you provide a
*specific* example of what you are seeing on your system, instead of
trying to generalize your problem.

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https://bugs.launchpad.net/bugs/1853669

Title:
  systemd resolves own hostname to link local ipv6 address

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