KatolaZ <katolaz@???> wrote:

> $ apt-file search dhcpd.conf
>
> says that the former comes from isc-dhcp-server (as someone else
> suggested) while the latter does not belong to any package in
> particular, so it must have been put there by you (or by an older
> package that does not exist eny more, who knows?).

Ah, now you mention it ...
I have (very) vague recollections that earlier versions of the iSC server were packaged (in Debian) as "dhcp-server" and may have used /etc/dhcpd.conf. At some point, it got changed to "isc-dhcp-server" (and the client to "isc-dhcp-client") and config files got moved to /etc/dhcp/ - this would have been to avoid confusion with other DHCP server and client packages. I think there was some sort of transitional package, and that would have been responsible for moving (or copying ?) the config file to it's new home.
This was many years ago - a couple of decades IIRC.

And writing that last sentence does suddenly make me feel old ! Sorry gents (and ladies), I do nothing to dispel the stereotype of us being greybeards :D