For Ubuntu 13.10/14.04/1404.1 64 bit installs

sudo apt-get install libc6-i386 libglib2.0-0:i386 libsm6:i386 \ libglu1-mesa:i386 libgl1-mesa-glx:i386 libxext6:i386 \ libxrender1:i386 libx11-6:i386 libfontconfig1:i386 lsb-core

For Ubuntu 14.04.2 image 64 bit installs (when using the 14.04.2 image you get the mesa-lts-utopic stack so one package is different, ie. libgl1-mesa-glx-lts-utopic:i386

sudo apt-get install libc6-i386 libglib2.0-0:i386 libsm6:i386 \ libglu1-mesa:i386 libgl1-mesa-glx-lts-utopic:i386 libxext6:i386 \ libxrender1:i386 libx11-6:i386 libfontconfig1:i386 lsb-core

Then get the current i386 package & install it - http://www.google.com/earth/download/ge/agree.html