Week 12 Notes for CS 3750 -- Fall 2002

• Take Roll.
  
  
• Look at the upcoming schedule and programming assignment.
  
  
• Announcements
  
  
  • You have due dates of Monday, November 25 (pseudo-code) and Monday, December 2 (final version) for the second programming assignment.
    
    
  • We are reading chapter #18 (Protection) and chapter #19 (Security)
    
    
  • I will finish discussion of Chapter 10 (Virtual Memory) early this week.
    
    
  • After finishing with Chapter 10 I will try to cover about two chapters per day until we get to the section on distributed systems (part five). I'll slow down a little and discuss some topics there in greater length. If time allows I'll discuss material in parts six and seven too.
    
    
  • There will be a special make-up exam from 8:30 to 10:30 on Monday, December 16 for students who need to make up a failing quiz average.
    
    
  • We need to discuss the possibility of moving the date of quiz #3 from Friday, December 6 to Monday, December 9.
    
    
  • Homework #4 has been assigned and is due Wednesday, December 4.
    
    
• Hand back quizzes.
  
  
• I have started grading program 1 -- not much done yet.
  
  
• Cover chapters 10-12.
  
  
• Work out problem 12.1.
  
  
• Get file names, user identificaton, sizes, protection, and time of last modification: ls -l
  
  
• Get inode numbers of files (file identifiers): ls -i
  
  
• Get time of last access of files: ls -lu
  
  
• Use chmod to change permissions on a file.
  
  
• Use file to see some file types.
  
  
• Look at a /etc/passwd file to see how it determines the initial cwd. Note the permissions on the file and the implications.
  
  
• Look at a /etc/group file to see how it determines privileges. Note the permissions on the file and the implications.
  
  
• Show how to delete a full directory with rm -r
  
  
• Show how to use the ln or ln -s commands to create a hard or soft link.
  
  
• run the mount command and see what is mounted. Figure out which are local and which are NFS mounts -- try figuring out some of the "flags" and so forth.
  
  
• Do niscat cred.org_dir and niscat of group.org_dir, passwd.org_dir.
  
  
• Do a man -s 2 sync and think about what the text says about preserving metadata.