Execute “mesos-slave.sh” using root privilege

I have spent the past week to try building “Kubernetes on Mesos” following Getting started with Kubernetes on Mesos document, but “kubectl get node” always reports the node state is not ready:

$ kubectl get node
NAME      LABELS                          STATUS     AGE
ubuntu    kubernetes.io/hostname=ubuntu   NotReady   4h

Today, when executing “./bin/mesos-slave.sh --master=127.0.0.1:5050” command, I notice this log:

W1217 05:52:42.213497 24074 backend.cpp:50] Failed to create 'bind' backend: BindBackend requires root privileges

So I use sudo command to run the ./bin/mesos-slave.sh script again, then the “Kubernetes on Mesos” runs successfully: