Installs DNSMasq. Tested in a Vagrant shell provisioner for a Ubuntu 12.04 VM.

install-dnsmasq.sh

# Installing dnsmasq so that loopback communication using the site URL doesn't fail.
if [ ! -e '/etc/dnsmasq.conf' ]; then
  echo -n "Installing and configuring DNSMasq..."
  apt-get install dnsmasq -qq -y > /dev/null 2>&1
  cat >> /etc/dnsmasq.conf << "EOF"
address=/.umassmemorial.org/127.0.0.1
listen-address=127.0.0.1
EOF
  sed -i -r -e 's/^(\s*)#(\s*prepend domain-name-servers\s+.*)$/\1\2/' /etc/dhcp/dhclient.conf
  service dnsmasq restart > /dev/null
else
  echo "DNSMasq is already installed (and presumably configured)."
fi