title: cx_Oracle on linux: ImportError: libclntsh.so.12.1: cannot open shared object file: No such file or directory
body: <p>I'm having problems using cx_Oracle on a linux system. I get the error message: <code>libclntsh.so.12.1: cannot open shared object file: No such file or directory</code>. </p>
  
  <p>What exactly do I need to install to make it work?</p>