Hi,

I've just installed Fedora 28 and I wanted to make it discoverable on
my local network via mDNS. I'm using Avahi to resolve .local names of
my ArchLinux and Ubuntu boxes. To make it work, I've installed and
started avahi daemon on both boxes and slightly modified 'host:' line
in /etc/nsswitch.conf (with the help of ArchWiki) to

        hosts: files mymachines mdns_minimal [NOTFOUND=return] resolve 
[!UNAVAIL=return] dns myhostname

However, on Fedora 28, the header of the aforementioned file has the
following at the top

        # Generated by authselect on Tue May 21 10:25:11 2018
        # Do not modify this file manually.

So I guess my changes would be overwritten at some future time when
authselect will be run by some daemon. I started avahi-daemon.service
but name resolution of .local hostnames, current machine hostname to be
precise (pluto.local), doesn't work.

        # hostname
        pluto
        # ping pluto.local
        ping: pluto.local: Name or service not known

I've also tried

        # systemctl disable firewalld

before running commands above.

I don't know what authselect is (yet). I tried to Google it, ended up
at SSSD documentation and now I'm more confused than when I started. It
seems these tools/services are intended for enterprise environments,
not for my home, but I don't dismiss it, partly because I want to keep
my Fedora as it was designed.

How can I enable mDNS name resolution? I want to be able to resolve
mDNS names of other machines on local network as well as being able to
connect from these machines via Fedora's host mDNS name.

Thank you.
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