Prerequisites for installing EC2 Instance Connect: Ubuntu to ubuntu
<ul>
<li>AWS account
</li>
<li>Run Ec2 instance
</li>
<li>AWS ubuntu server with privet key file (key.pem) &amp; path of this file
</li>
</ul>
<img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1708369291013/6992a351-a33c-4771-a155-175f1a5b76d4.png" alt class="image--center mx-auto" />
<ul>
<li><pre><code class="lang-bash"> chmod 400 "testdemo1.pem"
</code></pre>
 chmod 400 means permit to :{testdemo1.pem } is security privet key
</li>
<li>The owner can read the file.
</li>
<li>Group members have no permissions.
</li>
<li>Others have no permissions.
 <img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1708369444140/6d2c7d99-566b-409d-b8e0-d94613772f58.png" alt class="image--center mx-auto" />
<pre><code class="lang-bash"> ssh -i "testdemo1.pem" ubuntu@ec2-52-1-30-149. compute-1.amazonaws.com
</code></pre>
</li>
</ul>

**Prerequisites for installing EC2 Instance Connect: Ubuntu to ubuntu**

* AWS account
    
* Run Ec2 instance
    
* AWS ubuntu server with privet key file (key.pem) & path of this file
    

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1708369291013/6992a351-a33c-4771-a155-175f1a5b76d4.png align="center")

* ```bash
      chmod 400 "testdemo1.pem"
    ```
    
    **chmod 400 means permit to :{testdemo1.pem } is security privet key**
    
* The owner can read the file.
    
* Group members have no permissions.
    
* Others have no permissions.
    
    ![](https://cdn.hashnode.com/res/hashnode/image/upload/v1708369444140/6d2c7d99-566b-409d-b8e0-d94613772f58.png align="center")
    
    ```bash
    ssh -i "testdemo1.pem" ubuntu@ec2-52-1-30-149. compute-1.amazonaws.com
    ```

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