Shell Programming and Scripting

I'm looking to write a sample shell script that counts the number of distinct words in a text file given as Argument.
Remark: White space characters are spaces, tabs, form feeds, and new lines.

JUST with this commands tr, sort, grep. wc.

Thanks.

It sounds like you already know which commands you need to use. Where are you stuck? Have you read the man pages for those commands?

Actully yes but i don't know how i can use it to give me distinct words.

please if you can just guide me how i can do it. thank you

Difficult to "guide" you how to do it without just telling you how to do it.... and that way you won't learn anything!

Try using tr to strip out all punctuation (see the -d option), then using tr again to convert all spaces to carriage returns and all upper-case characters to lower-case. Then you can sort the output using the unique option (see the man page) so that you end up with only distinct words, and then count the number of lines produced using wc.

perl:

Code:

$file=shift;
open(FH,"<file");
while(<FH>){
	@arr=split(" ",$_);
	for($i=0;$i<=$#arr;$i++){
		$hash{$arr[$i]}++;
	}
}
close(FH);
for $key (keys %hash){
	print $key,"--->",$hash{$key},"\n";
}

just pass those agrument to grep -c

scriptname abc efg
grep -c "$1" filename---this will give the count of abc in file
similarly do for remainning...

I don't think you understood the question vidyadhar85.