public static boolean DeleteSuffix(String hostname)
    {
        Read(hostname);
        List<String> todel = new ArrayList<String>();//list to delete
        for(String s : Suffixes)
        {
            String[] split = s.split(" ");
            if(split[0].equalsIgnoreCase(hostname)){
                todel.add(s);
                if(Delete(SuffixesFile, (s)) == false) return false;
            }
        }
        for(String s : todel) Prefixes.remove(s);
        return true;
    }