Remove Ubuntu One

To start, we need to make sure that Ubuntu One isn’t running. Open the System Monitor, in System > Administration > System Monitor.
In the Processes tab, look for anything that starts with “ubuntone”. Select them, and click End Process.

Next, we’ll get rid of the stored authentication token for Ubuntu One. Click on Applications > Accessories > Passwords and Encryption Keys.
If a token for UbuntuOne exists, right-click on it and select Delete.

Now we can remove all of the folders that Ubuntu One uses. Open up a terminal window (Applications > Accessories > Terminal) and enter the following commands:

    rm –rf ~/.local/share/ubuntuone
    rm –rf ~/.cache/ubuntuone
    rm –rf ~/.config/ubuntuone
    rm –rf ~/Ubuntu\ One

Finally, we can remove all of the packages related to Ubuntu One.
In the terminal window, type in:

    sudo apt-get purge ubuntuone-client* python-ubuntuone-storage*