Securing the Mountpoint

POSIX permissions are the only limitation on read access by the MapR POSIX client, whether the cluster connected to has security enabled or disabled. By securing the mountpoint, you can limit access to a single user.

Complete the following steps to secure the mountpoint:

On the client system, create /mapr/<clustername>:
```
mkdir -p /mapr/<clustername>
```

Set ownership and permissions:

chown user1:<posix_user> /mapr 
chmod 700 /mapr

Mount the cluster:
```
mount localhost:/mapr/<clustername>  /mapr/<clustername>
```
Now only the <posix_user> can access the cluster with the POSIX client.