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:
# This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 192.87.30.54 netmask 255.255.255.192 gateway 192.87.30.1 # This is a statically configured IPv6 interface iface eth0 inet6 static autoconf 0 address 2001:610:148:dead::54 gateway 2001:610:148:dead::1 netmask 64 dns-search terena.org dns-domain terena.org dns-nameservers 2001:610:1:800a:192:87:106:106 2001:610:188:140:145:100:188:188
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.