How to properly encrypt database backups on the server before uploading them to dropbox or AWS?

Question

Backup

How to properly encrypt database backups on the server before uploading them to dropbox or AWS? Do I just need to copy my public key from my local computer to the server and use it there? Everything?

Answer 1

Encryption of database backups = encryption of any file.
Encrypting a file is quite a specific operation that requires certain actions.
And what about the public key?