The easiest way to find out who has been looking at your Linkedin profile is by email. Linkedin automatically sends you emails of who has been looking at your profile as long as you did not block linked in from sending you messages or you did not unsubscribe. When you were registering for Linkedin, I am sure there was an option to receive emails from Linkedin and if you didn’t select that option when you registered, there should be away to opt in to emails from Linkedin.
Here is an example of someone who viewed my Linkedin profile. Linkedin profiles are great ways to get found by recruiters for great jobs.