First, navigate your browser to the official Phoronix Test Suite download page and initiate the download of the latest Phoronix Test Suite UBUNTU/DEBIAN package. Save the *.deb package into your eg. home directory.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-install-the-latest-phoronix-test-suite-on-ubuntu-18-04-bionic-beaver