ssh

• https://en.wikipedia.org/wiki/Secure_Shell
• https://en.wikipedia.org/wiki/Public-key_cryptography
• https://en.wikipedia.org/wiki/Comparison_of_SSH_clients
• https://en.wikipedia.org/wiki/Comparison_of_SSH_servers
• https://en.wikipedia.org/wiki/Rclone
• https://en.wikipedia.org/wiki/Rsync
• https://en.wikipedia.org/wiki/OpenSSH