How to start gnupg?

[Francesco Ariis]

Hello John,

On Sat, Dec 01, 2018 at 10:33:35PM +0000, John Broyles wrote:
> I have a large file that was encrypted with PGP and I want to decrypt it.

Was encrypted by whom? Usually gpg tutorials start from creating your
own key (which you and your friends can use to encrypt files to you),
but apparently you have already created it.

Or is it (if you know) a file encrypted with a simple passphrase
(symmetric encryption)?
-F