How to transfer ssh key from windows to linux (mint)?

Question

SSH

I generated an ssh key at home on Windows using Putty, saved the public and private keys in files (closed in .ppk). The question is how can I transfer these keys to linux? in the sense not to the server, but to the machine from which I will connect

Answer 1

As you wish.
Do not give your private key to anyone - it is only needed on the client to connect.
Pass only open. At least send it by mail or put it on the site - it's open.

Answer 2

Putty keygen has an option to choose the key type, you need openssh.