This question already has an answer here:
When I access
http://example.com in a web browser, the browser adds a slash to the end of the URL and loads the page.
The part that scares me is that duplicate content exists when one uses the command-line tool CURL to access the same domain with and without the slash. This means
http://example.com/ doesn't redirect to
http://example.com or vice-versa, and neither indicate its canonical. (both attempts return the exact same result).
Since practically every website has this issue including this one and mine, Does this mean that I shouldn't care about this duplicate content issue or is there something that can be done about this?