#!/bin/bash
# Bash script to tidy a hostname file

function clean_file {
	filename="$1"
	if [[ "$filename" == "" ]]; then return 1; fi
	tmpfile="`mktemp`"
	cat "$filename" | sort | uniq > "$tmpfile"
	mv "$tmpfile" "$filename"
}

for filename in "$@"; do
	clean_file "$filename"
done