This recipe is for a standard Plex Media server with Sonarr, Radarr, and Sabnzbd running on Debian 10
Install Plex
Download Plex media server from the Plex download page
https://www.plex.tv/media-server-downloads/#plex-media-server
Once you've copied the URL for the linux/arm64 version, download it using:
wget https://downloads.plex.tv/plex-media-server-new/1.16.5.1488-deeb86e7f/debian/plexmediaserver_1.16.5.1488-deeb86e7f_amd64.deb
Install using
sudo dpkg -i plexmediaserver_1.16.5.1488-deeb86e7f_amd64.deb