Sep 9

 -- ports --

 discuss (briefly) firewalls, ports, iptables on cs.marlboro.edu
 mention lynx
 mention wget, curl
 show a demo of nc
   on cs:        $ nc -l -p 8100
   on laptop:    $ nc cs.marlboro.edu 8100

 -- perl -- 

 * hashes
 * subroutines

 other basic programming topics you'll want to explore
 * loops
 * conditionals         for, if
 * file i/o             give a simple example; discuss "chomp".

    open INPUT, "filename" 
      or die "Oops couldn't open INPUT ... ";
    my $line = <INPUT>;
    chomp($line);

    # ...

    open OUTPUT, ">filename" 
      or die "Oops couldn't open OUTPUT ... ";
    print OUTPUT $line;                 # No comma between OUTPUT and $line !!

 In class : 
   * write a program to print a table of squares
   * on cs.marlboro.edu, /usr/share/dict/words has one perl line.
     Write a program to print a random sentence.
     - How do we make the first letter upper case? 
        (Google: "perl convert word uppercase,
         perldoc.com manual perlfunc)
     - How do we pick a random number?
        (Google: "perl random number"
     - How many lines are there in the dictionary?
        - text editor, or
	- program to count 'em.