I've done the following command to set the path for LD_PRELOAD. But it's the wrong path.
Does anyone know what is the default path for LD_PRELOAD on Ubuntu 12.04? What is the exact command to reset the export?
There is no default LD_PRELOAD variable, or, in other words, it is empty. You can revert to that state by typing
LD_PRELOAD is not to specify the libraries found in the regular case; it is just here to specify an order of library loading that is different from the regular one (determined by ldconfig(8)).