Features of UNIX

• Background

• File Organization

Background

• Multitasking, Multiuser

• Case Sensitive

• Developed by programmers for programmers

• Various dialects similar but not identical

• Physical devices treated as files
  
  (<ctrl-d> is end of file)

  Wild Cards make UNIX Unique and extremely useful

• Unix files are arranged in a tree-like structure similar to MS-DOS or VMS
• Sections of the "tree" are called file Systems
• File systems contain directories
• Directories can contain files or other directories
• The root file system contains system directories and files
• New file systems are "grafted" onto existing file systems
• All users have personal home directory