I am unable to install AWS Greengrass on my Ubuntu Touch OS phone.

Question

I want to install AWS Greengrass on my Ubuntu Touch OS phone. It is a Google Pixel 3a phone that has ubuntu touch OS as the operating system. We are able to access the terminal from the phone. I am getting the error, "Unable to set up Nucleus as a system service". I also tried to install greengrass as a docker container. Even that is not happening. Please provide me any suggestions on how to continue further.

Answer

Hi,
Touch OS phone uses [upstart](https://upstart.ubuntu.com/) and not [systemd](https://en.wikipedia.org/wiki/Systemd). Like **systemd**, you can use **upstart** to start Greengrass, and respawn it in case of failure.

I would advice to first test to start Greengrass manually. Assuming the installation went Ok up to the point where you got the `Unable to set up Nucleus as a system service` error, you can try starting Greengrass via the following command:

```
MIN_HEAP_SIZE="100m"
MAX_HEAP_SIZE="100m"
LOG_STORE="FILE"
NUCLEUS_PATH="/greengrass/v2/alts/current/distro/lib"
java -Xms$MIN_HEAP_SIZE -Xmx$MAX_HEAP_SIZE -Droot=$GGC_ROOT_PATH -Dlog.store=$LOG_STORE -jar $NUCLEUS_PATH/Greengrass.jar
```

Note: HEAP_SIZE values are only suggestions - you might need to change them based on your system

I am unable to install AWS Greengrass on my Ubuntu Touch OS phone.

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