Set panel become aero theme on Ubuntu

  1. Go to Applications (or Main Menu) > Accessories > Terminal.
  2. Enter cp -R /usr/share/themes/Ambiance ~/.themes/
  3. Enter gedit ~/.themes/Ambiance/gtk-2.0/apps/gnome-panel.rc (for Ubuntu 11.04 or 10.10) OR gedit ~/.themes/Ambiance/gtk-2.0/gtkrc (for Ubuntu 10.04), to open the file with gedit.
  4. Search for this line bg_pixmap[NORMAL] = "img/panel.png" (for Ubuntu 11.04 or 10.10) OR bg_pixmap[NORMAL] = "panel_bg.png" (for Ubuntu 10.04)
  5. Comment out the line by placing a # at the beginning of the line, like this: #   bg_pixmap[NORMAL] = ...
  6. Save the file.
  7. Go to System > Preferences > Appearance, switch to the other theme and then back to the Ambiance theme.
 to

  change to the New Wave theme, then enter cp -R /usr/share/themes/"New Wave" ~/.themes/ in step 2, enter gedit ~/.themes/"New Wave"/gtk-2.0/gtkrc in step 3, search for and comment out this line bg_pixmap[NORMAL] = "Images/Panel/PanelBarLong.png" in steps 4 and 5