1) Write a script that sends mail to every user on your system who is using more than N megabytes  of disk space.  'N' is supplied on the command line.  Remember that command line arguments are things like $1, $2 and $@.  
	Example:
		sendHateMail 20


2) Write a script that prints all processes using more than 30 megabytes or more than 20% of the CPU.  You can create such a 
process using C++, declaring a big array, iterating through them alot.
	main() {
		int huge[10000000];
		for(int x =0; x < 10000000;x++)
			huge[x]++;
	}


3) Write a shell script that prints the list of people who are active on the host.  A person is active if their idle time is less than one minute.  
Hint:
	"w" prints a list of everyone logged on and their idle time.
	"cut" can remove unneeded parts of a line
	You can read a file into a shell script one line at a time like this ...
	cat filename | while read a b c 
	do
     		echo $a $b $c
	done

4) Change your prompt to something cool using at least two escape codes.  This should survive reboot.

5) Add an alias that's useful.  This should survive reboot.