A good administrator should have knowledge on what is a file system and how files are stored in file system. Having atleast some idea about these terms are helpful in restoring filesystem in emergency situations. What is Directory ? Directory is a collection of files stored as a group , say it is a group of files with single name. A directory can be classified into two types Root Directory : root is the parent of total directories , say main drive or main filesystem(/) is the root directory . Sub directory : these are the directories that comes under the root directory in hierarchy , In general a directory within a director can be called as sub directory. What is a File? Files are collection of data items stored in a disk or it is a device which can store the information like data, music (mp3,ogg), photographs, movie, sound, book etc. It is like every thing you store Read more