User inside each container has root privileges

```
Since the user in shell of each node is root, there is basically no limit to
what a CORE user can do on the system. This is fine for scientific experiments
utilizing network emulation, but severely limits usability of CORE in teaching
environment, especially if the PC is shared among multiple students.

Is there anything that can be done to limit the system-wide privileges of a
user inside node?
```

Original issue reported on code.google.com by `riva...@gmail.com` on 1 Jun 2013 at 8:24