Getting ready for the new Ubuntu LTS release
It looks good, and it feels fast. Rebooting a VM takes 9 seconds, which is faster than ever. No need to schedule maintenance windows any more (not that I did anyway ).
Network interface configuration and DNS resolution
Things have changed. Both interface configuration and name resolution configuration are now done in
/etc/network/interfaces. There is a new flag for autoconfiguration, so no need to echo things to /proc anymore. For our dual stack staticly configured servers the configuration looks like this:
Note that despite the comment on the second line (see interfaces(5)), not everything is explained there. You have to look at resolvconf(8) as well.