How do I uninstall Dropbox?

This is from Dropbox help page:

dropbox stop
dropbox status  # Should report "not running"
rm -rf ~/.dropbox-dist
rm -rf /var/lib/dropbox
rm -rf ~/.dropbox*
sudo apt-get remove nautilus-dropbox
sudo apt-get remove dropbox
rm /etc/apt/source.d/dropbox

Try this command in a terminal:

sudo apt-get remove --purge nautilus-dropbox

Based on this link you can follow this steps:

dropbox stop
dropbox status  # Should report "not running"

rm -rf ~/.dropbox-dist
rm -rf /var/lib/dropbox
rm -rf ~/.dropbox*
sudo apt-get remove nautilus-dropbox
sudo apt-get remove dropbox
rm /etc/apt/source.d/dropbox

And if you want to delete the files that were synced, you can run this command:

rm -rv ~/Dropbox

You can remove a package through apt-get:

sudo apt-get remove dropbox