Sorry about the dumb question but:

I was running 3.3.1 and decided to upgrade to 3.4.2, Running Ubuntu 12.04, I get this error:

./cgminer: error while loading shared libraries: libudev.so.1: cannot open shared object file: No such file or directory

Is there an easy way to fix this? Googled around and there were no answers that solved this for me.

Thanks in advance.