#!/bin/bash
#
# Disable IPv6 privacy extensions on Utopic and later
#

codename=$(sh -c 'lsb_release --short --codename')
dist_ge() { [[ "$1" > "$2" || "$1" == "$2" ]]; }

if ! dist_ge "${codename}" "trusty"; then
    exit 0
fi

cat << EOF > /etc/sysctl.d/99-cloudimg-ipv6.conf
# Written by the Cloud Image build process
# See https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1068756
net.ipv6.conf.all.use_tempaddr = 0
net.ipv6.conf.default.use_tempaddr = 0
EOF