If you want to update PMS on your QNAP using SSH, it can be done by doing the following:
- Browse to https://www.plex.tv/media-server-downloads/
- Select the relevant QPKG
- Right-Click on the download link, and copy to your clipboard
- Open an SSH connection to your QNAP
- In the console, type:
cd /share/Publiccurl <DOWNLOADLINK> --output pms.qpkgchmod +x pms.qpkg./pms.qpkg
Above will download and install/update PMS from Plex download site