@@ -166,7 +166,10 @@ instance-type: m1.large

 EOF

 # (re)start a metadata service

-lsof -iTCP@192.168.$GUEST_NETWORK.1:4567 -n | awk '{print $2}' | xargs -n1 kill -9

+(

+  pid=`lsof -iTCP@192.168.$GUEST_NETWORK.1:4567 -n | awk '{print $2}' | tail -1`

+  [ "$pid" == "PID" ] || kill -9 $pid

+)

 cd $vm_dir/uec

 python meta.py 192.168.$GUEST_NETWORK.1:4567 &