Many times you will see a shortened url but you aren’t sure what it points at. Here’s a little tip that I picked up from Tom Morris.
Pop open your terminal, or console, or whatever your command-line application is and type the following:
This pops up a short amount of useful information about the target url. For example the response for the Google short URL for this site shows this;
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And you can see that the Location shows that you aren’t going to get Rick-rolled.