Use the right executable ss/netstat in log message

Ensure we log the same command we executed earlier

Author: dims

hack/lib/etcd.sh

@@ -45,7 +45,7 @@ kube::etcd::validate() {
   fi
   if ${port_check_command} -nat | grep "LISTEN" | grep "[\.:]${ETCD_PORT:?}" >/dev/null 2>&1; then
     kube::log::usage "unable to start etcd as port ${ETCD_PORT} is in use. please stop the process listening on this port and retry."
-    kube::log::usage "$(netstat -nat | grep "[\.:]${ETCD_PORT:?} .*LISTEN")"
+    kube::log::usage "$(${port_check_command} -nat | grep "LISTEN" | grep "[\.:]${ETCD_PORT:?}")"
     exit 1
   fi