The SQL DBA in the Linux world
There are some vital differences between Linux and Windows. An essential difference is that in Linux, everything is configured as a file. Even directories and device drivers are identified as text files. The kernel views the directory structure as a series of files with a clear hierarchal layout that culminates in the root directory (also known as /). The concept of alphabetical identifiers as mount points is different on windows, which are more likely to be identified by user (u) or disk (d).
For all this identification, very little of it has any meaning for the Linux kernel. As it identifies everything as a file, it doesn't require an understanding of hierarchy and is programmed to identify everything in a horizontal structure. The kernel refers to everything via nodes. The unique identifiers that represent each file, directory, and permission among the nodes allows the kernel to search, locate, and identify all processing at immense speeds...