Upgraded Ubuntu 18.04 to 18.10 on Phicomm N1

Nothing tricky. Just replace all occurrance of bionic with cosmic in /etc/apt/sources.list and do a apt full-upgrade. For details, see Upgrading from Ubuntu 18.04.

But what worth noting is that after the upgrade /etc/sysctl.d/10-ipv6-privacy.conf no longer works as expected. RFC 4941 is not in effect anymore. According to What about ‘net.ipv6.conf.default.use_tempaddr’ and ‘net.ipv6.conf.all.use_tempaddr’?, this should have never worked (and not considered as a BUG) but weirdly it did work in Ubuntu 18.04.

To enable RFC 4941 on eth0 (again), I created another file under /etc/sysctl.d/ with:

Not sure if related or I just did not notice, but after upgraded to Ubuntu 18.10, the wireless interface shows up in ifconfig.

Now the box looks like this:

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