Install Emby Server on Debian (or Raspbian)

install-emby.sh

# we need root permission
sudo su

# run the required commands
wget http://download.opensuse.org/repositories/home:emby/Debian_8.0/Release.key
apt-key add - < Release.key
echo 'deb http://download.opensuse.org/repositories/home:/emby/Debian_8.0/ /' >> /etc/apt/sources.list.d/emby-server.list 
apt-get update
apt-get install emby-server

# start the emby server
sudo service emby-server start

Did you manage to fix this issue?

I managed to install emby-server on stretch using these two commands (as su):
curl -sSL https://get.docker.com/ | sh
docker run -it --rm -v /usr/local/bin:/target emby/embyserver:armv7 instl