Re-enable lower panel in Ubuntu

If accidentally you delete your lower panel in Ubuntu and could not bring it back after attempting several trials, you can try this below:

gconftool-2 --shutdown
rm -rf ~/.gconf/apps/panel
pkill gnome-panel

I have tried this solution and it worked.
The commands are originally taken from here
http://lists.ethernal.org/oldarchives/cantlug-0610/msg00566.html