How to Install Dropbox on Ubuntu 18.04 From Official Repository
This tutorial will be showing you how to install Dropbox on Ubuntu 18.04 LTS desktop from Dropbox Linux repository. Dropbox Team hasn’t updated their repository for Ubuntu 18.04, but the installer for Ubuntu 16.04 works well on 18.04. We will not download the installer from Dropbox Linux Download page, because the installer on that page is outdated.
Read full tutorial here: https://www.linuxbabe.com/ubuntu/install-dropbox-ubuntu-18-04