Oracle on Windows and Oracle on Linux differ only in how the instance interacts with the operating system. They use different system calls and the OS handles processes differently on each system. But the beauty of relational databases is that for 99% of the time, you don't need to know anything about these differences. But you do have to know that on Windows, Oracle software runs as a service, but on Linux, these are processes. On Windows, files reside on a drive and the directory path includes this drive designation (C:, D:, etc). On Linux, files are on volumes and the directory path has the volume name in it (i.e. /volume/directory/filename). Those are the major differences.
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