oooooooooooo                       oooo        ooooooooooooo oooo                                          .o.       oooo  oooo 
`888'     `8                       `888        8'   888   `8 `888                                         .888.      `888  `888 
 888         oooo  oooo   .ooooo.   888  oooo       888       888 .oo.    .ooooo.  ooo. .oo.  .oo.       .8"888.      888   888 
 888oooo8    `888  `888  d88' `"Y8  888 .8P'        888       888P"Y88b  d88' `88b `888P"Y88bP"Y88b     .8' `888.     888   888 
 888    "     888   888  888        888888.         888       888   888  888ooo888  888   888   888    .88ooo8888.    888   888 
 888          888   888  888   .o8  888 `88b.       888       888   888  888    .o  888   888   888   .8'     `888.   888   888 
o888o         `V88V"V8P' `Y8bod8P' o888o o888o     o888o     o888o o888o `Y8bod8P' o888o o888o o888o o88o     o8888o o888o o888o

Setting GTK2+ theme.

  1. List available themes:

    $ ls -d /usr/share/themes/*/gtk-2.0/
/usr/share/themes/Clearlooks/gtk-2.0/
/usr/share/themes/Crux/gtk-2.0/
/usr/share/themes/Industrial/gtk-2.0/
/usr/share/themes/Mist/gtk-2.0/
/usr/share/themes/Raleigh/gtk-2.0/
/usr/share/themes/Redmond/gtk-2.0/
/usr/share/themes/ThinIce/gtk-2.0/

  2. Choose a theme:

    $ echo "include \"/usr/share/themes/Crux/gtk-2.0/gtkrc\"" > ~/.gtkrc-2.0

Reference: GTK+ Reference Manual: Resource Files.

2010-01-15