gistfile1.txt

#!/bin/sh
#
# Copyright
#
# Check for the correct # of arguments:
# Use this syntax or use: if [ $# -lt 3 ]

echo "$# arguments were supplied."

if [ $# -lt 3 ]
then
	printf "%b" "Error. Not enough arguments.\n" 
	printf "%b" "usage: myscript file1 op file2\n" >&2
	exit 1
elif [ $# -gt 3 ] 
then
	printf "%b" "Error. Too many arguments.\n" >&2
	printf "%b" "usage: myscript file1 op file2\n" >&2
	exit 2
else
	printf "%b" "Argument count correct. Proceeding...\n"
	input_file=$1
	op=$2
	output_file=$3
	echo $input_file
	cat $input_file | sort > $output_file
fi