I tested this a bit now, because I was curios, so it also requires `sudo` for the installation, installing it as `root` or as user with write permissions to `/o

I tested this a bit now, because I was curios, so it also requires `sudo` for the installation, installing it as `root` or as user with write permissions to `/opt` will not work and causes the misleading error: Please make sure that your user can access /opt/amber directory. Creating this directory, either manually or by the script before it fails to download amber, will cause the installer script think that amber is already installed. So not a very high quality shell installer script for a tool that generates shell scripts.