dev_file = "/etc/rc.d/rc.sysinit"
sed_change = /^\/sbin\/start_udev/
ruby_block "change rc.sysinit for lxc" do
  block do
    sed = Chef::Util::FileEdit.new(udev_file)
    sed.search_file_replace(sed_change, '\1')
    sed.write_file
  end
  only_if { ::File.readlines(udev_file).grep(sed_change).any? }
end if node.key?('virtualization') && node['virtualization']['system'] == 'lxc'