what is the benefits of SSH RSA Fingerprint? and how does it different from PGP ?
also how can i use it? are there any tool to do this?
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.
If you mean SSH RSA finger print, than it is used to verify the host, so if you accept fingerprint once (you should check if it is real one from your machine), than you will be warned if it is changed. Than you can avoid eg. man in the middle attacks. In my opinion, does not matter what kind of finger print is used, but RSA is kind of standard on unix machines.