ssh-keygencommand to create an SSH public key and SSH private key also known as a key-pair.
key_name.pub file and open it.
PUBformat, and the private key must be in the
PPKformat. On Windows, you can use PuTTYgen to create an SSH key-pair in the appropriate formats. You can also use PuTTYgen to convert a private key generated using
ssh-keygento a .ppk file.