Filesystem Hierarchy Standard in Linux

[1] http://askubuntu.com/questions/138547/how-to-understand-the-ubuntu-file-system-layout/138551#138551
[2] https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard



Linux File System version is 2.3, announced on January 29, 2004. [1]

etc/    

Since the publication of early documentation, the directory name has been re-explained in various ways. Recent interpretations include backronyms such as "Editable Text Configuration" or "Extended Tool Chest". [2]