Add Dropbox’s repository key
sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 5044912E
Add Dropbox’s repository
sudo add-apt-repository "deb http://linux.dropbox.com/ubuntu $(lsb_release -sc) main"
Update and install Dropbox
sudo apt-get update && sudo apt-get install nautilus-dropbox
Follow the steps When dropbox prompted with the screen
For Ubuntu 12.10
Add repository key
sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 5044912E
Add repository
sudo add-apt-repository "deb http://linux.dropbox.com/ubuntu precise main"
Update your system and install Dropbox
sudo apt-get update && sudo apt-get install dropbox
On Ubuntu 20.04
Add repo
sudo add-apt-repository "deb http://linux.dropbox.com/ubuntu bionic main"
Import Dropbox GPG key
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1C61A2656FB57B7E4DE0F4C1FC918B335044912E
If the above failed to receive keyserver, use below:
sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 1C61A2656FB57B7E4DE0F4C1FC918B335044912E
Update and install
sudo apt update
sudo apt install python3-gpg dropbox
~/.dropbox-dist/dropboxd
? You should edit your question to tell us this, and also to tell us what you mean by "Runnung Ubuntu on Windows..." Do you have a Wubi system (where you installed Ubuntu while running Windows, then rebooted to get into Ubuntu)? Are you using a virtual machine?