Mailing the story:

Proxmox backup server is a free and open source, enterprise-level backup solution. It is implemented as a dedicated Linux distribution based on Debian, and supports essential features like deduplication and encryption. We can use it as a solution to back up and restore virtual machines, containers and physical hosts. In this first tutorial dedicated to Proxmox, we learn how to download and install the server distribution, and how to access its web interface.