title: Linux/Unix Experience
body: <p>When I look at job descriptions for Google, Amazon etc, they all require C++ and Linux/Unix experience.  Could someone please define what this usually means in the context of job qualifications?  Do I know how to browse the file system in Linux?  Do I know how to run commands?  Is C++ coding completely different for Linux/Unix envs(compiler should only be different right)?  Thanks.</p>