bad address at /etc/hosts line 5

Noticing this in my error.log:

Jun 3 15:19:44 ubuntu dnsmasq[28680]: bad address at /etc/hosts line 5

I’m running dnsmasq 2.75 Dnsmasq version 2.75 Copyright (c) 2000-2015 Simon Kelley

>lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.2 LTS
Release:        16.04
Codename:       xenial

Here’s the first few lines of /etc/hosts:

# This hosts file is a merged collection of hosts from reputable sources,
# with a dash of crowd sourcing via Github
#
# Date: June 03 2017
# Number of unique domains: 36,247
#
# Fetch the latest version of this file: https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts
# Project home page: https://github.com/StevenBlack/hosts
#
# ===============================================================

127.0.0.1 localhost
127.0.0.1 localhost.localdomain
127.0.0.1 local
255.255.255.255 broadcasthost
::1 localhost
fe80::1%lo0 localhost
0.0.0.0 0.0.0.0
127.0.1.1 ubuntu
127.0.0.53 ubuntu

# Custom host records are listed here.

I update my hosts file via cron:

0 0 * * * root /usr/bin/python /opt/hostupdate/updateHostsFile.py -a -r -f 2>&1 | /usr/bin/logger -t UpdateHosts

Not sure what else I could provide. Could just be my system, or something more common? Doesn’t seem to have any issues though.

[aasril]

@dnmTX now that you’ve said it like that, i get it. maybe it was only me, but you could have phrased those sentences more clearly.

I assume that it’s specifically connected to MacOS

which one? the error, the line for ipv6 link-local? i thought you’re talking about the error, hence my response.

Probably the best thing is (the line fe80::1%lo0 localhost) to be commented(by default.) with some note for Mac users(.)

---

I’m not picking up on your post just trying to clarify what was my line of thought. and thanks btw, for now I’ll just comment out that line.

[aasril]

Since I saw that you were responding to this issue I’ve been motivated to find some more info and fixes I could.

The first thing I do was to make sure that I didn’t disable ipv6 intentionally or unintentionally in the past. After following three different tutorials which check three different files, I can say that ipv6 is not disable on this machine.

The first possible fix I tried is to add my interface to /etc/network/interfaces with added inet6 on the line. It didn’t work. The second thing I did was to disable dns-over-https proxy that I’m using since in one of my search this was mentioned, but also didn’t get rid of the error. The third thing I did was to install wide-dhcpv6-client. After it was installed I added a recommended config, then I also applied a patch for script the application used since it was mentioned that the default script was buggy. This also has no effect on the error.

I should mention that I rebooted the machine after each of try, just in case.

Since this error message seems doesn’t have any negative effects on my day-to-day use, I didn’t even notice this for more than a couple of years I have this machine. So there it is how far my motivation to the bottom of the problem go 😀 I don’t have any knowledge to go deeper, though if anyone has some suggestions I’ll be happy to try.

And @StevenBlack, thanks for your hard work maintaining this ever growing lists.