Computer Science 322
Operating Systems

• Announcements
  • no office hours Friday
• Last lab continues
• Looking ahead: about 2 weeks until last exam
• Lecture assignment recap
• File Systems
  • File system interface
    • file concept
    • file system - organized collection of files
    • file attributes
    • file operations
    • file types
  • Directories - listings of files
    • directory concept
    • directory operations
    • directory organization
      • single-level
      • two-level
      • tree-structured
      • acyclic-graph: links/shortcuts/aliases
      • general graph: upward-pointing links create cycles
    • directory implementation
      • linear list
      • hash tables

We are way overdue for a break from lecture assignments.