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Getting ready for the new Ubuntu LTS release (smile)

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 (wink)).

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
# 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-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.



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