The default for new installed Ubuntu is clean desktop. So, if you want to get your Trash Icon back to change the setting default.
Step 1. Run Desktop Configuration Editor
Open Application > Accessories > Terminal and type gconf-editor.
Step 2. Give value for trash_icon_visible
After the Desktop configuration Editor is displayed, open apps > nautilus > desktop and click the value at trash_icon_visible.
Even you can change the default name ‘Trash’ to any name that you want.
