On Sun, 8 May 2022 19:42:57 -0500 David Wright <deb...@lionunicorn.co.uk> wrote:
> I'm really not sure who, and under what circumstances, > hostnamectl is for. Nor am I, especially after this. According to apt-file, it is in the package systemd. > I ran: > > # hostnamectl set-hostname acerx > > and /etc/hostname was changed, but not /etc/hosts, which still had: > > 127.0.1.1 acer.corp acer I confirm this. I guess I missed it due to rarely referring to a computer by its hostname, but instead by localhost. Sigh. Thanks for the catch. It looks like I shall have to adjust my installation scripts. > > and also not /etc/mailname. I'm not saying it should have affected > those occurrences, but that it's better to check you have the > correct, consistent name throughout the system. Odd. On the two boxes I used hostnamectl on, mailname is set correctly. However, I ran it on installation, and may have fixed that manually (but there's no backup file), or by installing postfix subsequently. > > It's also not clear to me either, where one might insert this command > so that it takes effect early enough to avoid polluting the system > with wrong names. (The logs, for one example.) I run it in a script that I run manually immediately after installation. > > > > Whats I didn't check was what my router took to be my host name. > > > It did not reponse to my changed host name and I had to do it > > > manually in the router. Doing do seems to have solved my problem. > > > > > It would seem then that you were letting DHCP in the router set your > hostname as well as the usual IP address, nameservers etc, which > could be unfortunate if it doesn't agree. How you avoid that depends > …. Yup. However I make sure they agree by assigning most hosts a "host" statement in dhcpd.conf, and assigning a fixed IP address to a given MAC address, and then having dhcpd feed that to bind9. -- Does anybody read signatures any more? https://charlescurley.com https://charlescurley.com/blog/
