Download and install DaVinci with sudo. It'll be installed in /opt/resolve. Executing with resolve bin.
resolve require some additionla libraries to run:
wget http://fr.archive.ubuntu.com/ubuntu/pool/main/g/gst-plugins-base0.10/libgstreamer-plugins-base0.10-0_0.10.36-1_amd64.deb
wget http://fr.archive.ubuntu.com/ubuntu/pool/universe/g/gstreamer0.10/libgstreamer0.10-0_0.10.36-1.5ubuntu1_amd64.deb
sudo dpkg -i libgstreamer*.deb
sudo apt install libssl1.0.0 libssl-dev
cd /lib/x86_64-linux-gnu
sudo ln -s libssl.so.1.0.0 libssl.so.10
sudo ln -s libcrypto.so.1.0.0 libcrypto.so.10