It seems some people are having trouble getting Pharo to work on Ubuntu 14.04.1 LTS 64-bit.
Here is one way to make things work.
Pharo (the VM) is a 32-bit executable dynamically linked to a number of libraries, each of which has to be present in its 32-bit variant in order to run Pharo and/or to use all features.
On a clean, stock, fully updated Ubuntu 14.04.1 LTS 64-bit, do the following (the X11, GL and asound libraries are not needed when you run headless on a server):
$ sudo apt-get install curl libc6:i386 libssl1.0.0:i386 libX11.6:i386 libGL.1:i386 libasound2:i386
$ curl get.pharo.org/40+vm | bash
$ ./pharo Pharo.image eval “ZnClient new get: ‘https://google.com'”
$ ./pharo-ui Pharo.image
PS: You can use ldd to check if all dependencies of the VM and its plugins in the pharo-vm directory are satisfied