---
title: "Create a network namespace in Cloud9 host"
chapter: false
weight: 17
pre: "<b>1. </b>"
---

#### Introduction

1. Open two terminals in the Cloud9 environment. Let's refer them as Terminal 1 and Terminal 2.

2. Terminal 1 is referenced as the `Container Terminal` and Terminal 2 is the `Host Terminal`.


#### Create a network namespace in Terminal 1 (Container) using `unshare`
{{% notice info %}}
The `unshare` command unshares the indicated namespace(s) from the parent process and then executes the specified program. The namespaces to be unshared are indicated via options. Unshareable namespaces are `mount`, `UTS`, `IPC`, `network`, `pid`, and `user`.
Read more at: [https://www.commandlinux.com/man-page/man1/unshare.1.html](https://www.commandlinux.com/man-page/man1/unshare.1.html)
{{% /notice %}}

1. Check docker and network status
```
sudo bash
service docker status
ifconfig -a
```

2. Use `unshare` to create a mini-container with a separate network namespace

```
unshare --net --fork bash
```

3. Observe processes within the new namespace

```
ps
ifconfig -a
```