Do you use Kubuntu (or have KDE installed in Ubuntu) and want to add a Trash can to your KDE Desktop? If so, then follow these steps:
Create a text file on your Desktop by right-clicking on it and pointing to Create New > Text File. Open this file and paste the following in the file:
Comment=Contains removed files
Save the file and close it.
Looking to add the Trash Applet to your Ubuntu (Gnome) desktop? Read this post.