Install Defender for IoT micro agent for Edge

This article explains how to install, and authenticate the Defender micro agent for Edge.

Prerequisites

Add the appropriate Microsoft package repository.

Download the repository configuration that matches your device operating system.

For Ubuntu 18.04

curl https://packages.microsoft.com/config/ubuntu/18.04/multiarch/prod.list > ./microsoft-prod.list

For Ubuntu 20.04

 curl https://packages.microsoft.com/config/ubuntu/20.04/prod.list > ./microsoft-prod.list

For Debian 9 (both AMD64 and ARM64)

curl https://packages.microsoft.com/config/debian/stretch/multiarch/prod.list > ./microsoft-prod.list

Copy the repository configuration to the sources.list.d directory.
```
sudo cp ./microsoft-prod.list /etc/apt/sources.list.d/
```
Update the list of packages from the repository that you added with the following command:
```
sudo apt-get update
```

Install the Defender micro agent package on Debian, and Ubuntu based Linux distributions, using the following command:
```
sudo apt-get install defender-iot-micro-agent-edge
```
Validate your installation.
1. Ensure the micro agent is running properly with the following command:
```
systemctl status defender-iot-micro-agent.service
```
2. Ensure that the service is stable by making sure it's active and that the uptime of the process is appropriate
Test the system end-to-end by creating a trigger file on the device. The trigger file will cause a baseline scan in the agent, that will detect the file as a baseline violation.

Create a file on the file system with the following command:
```
sudo touch /tmp/DefenderForIoTOSBaselineTrigger.txt 
```
A baseline validation failure recommendation will occur in the hub, with a CceId of CIS-debian-9-DEFENDER_FOR_IOT_TEST_CHECKS-0.0:

Allow up to one hour for the recommendation to appear in the hub.
Install a specific version of the Defender IoT micro agent, use the following command:
```
sudo apt-get install defender-iot-micro-agent-edge=<version>
```