On some web pages offering programs to download, you may have seen something called an MD5 near the program link, consisting of a long, weird code like 6cbfd919baa7c9e03c8471ae4d8f8bb.
You can use that code to make sure the file you downloaded is what the author intended you to get and wasn’t corrupted during the download process or, worse yet, booby-trapped by someone else. Here’s how.

