The file input contains 10 lines. Each line contains a single word. The file data contains a text document.
Write a script (call it q4.sh). This script takes two arguments. Argument 1 specifies the name of the file containing the text document and argument 2 specifies the name of the file that contains the word list.
When called with valid arguments (both files exist) the script that reads the file input one line at a time and then searches the file data to count the number of occurrences of each of the words contained in input. Make sure your script checks for 1) the existence of the data file and 2) the input file and 3) that there are at least 2 command lines parameters provided to your script.
Your output should contain look something like the following with the information customized to your account and host:
User: username
Host: hostname
Word: 1st word Count: ###
Word: 2nd word Count: ###
etc. until all ten words have been completed.
Your script should provide a help message if the wrong number of parameters is provided or if one or both of the files is missing.
When you complete your script:
1) Run the script c4.sh, it will create a file called q4.txt.

Welcome to LinuxQuestions.

Now, where are you having problems? Post any code you have already written.

I don't understand at all about this question. Can you give me some resources what should I look for?

Lets start at the beginning.

Have you learned anything about command line arguments?

http://www.tldp.org/LDP/abs/html/

Moved: This thread is more suitable in Programming and has been moved accordingly to help your thread/question get the exposure it deserves.

How about you at least start by trying to write the start of a script and posting that.

For example you're supposed to check the arguments passed to the script and if those are not correct, you output an error statement showing the proper usage for the script.

Instead of going as far as checking out arguments, how about you write a script which just prints out that usage line and exits.

Then post that within [code][/code] tags.

In other words, write a script which prints out one line, and exits.

If you can't, or won't even do that, then try reviewing the resource shown to you by michaelk, that is the definitive shell script guide IMHO.

You have to start somewhere and you've not shown that you've even tried.

Others have provided good feedback, but it does still amuse me that teachers have the gall to ask questions about things that have never been taught. Surely a good teacher would
give you at least a rudimentary understanding of a subject before asking about something that the course should have taught you ... sheesh