CentOS binaries can be downloaded through multiple methods. You can download them directly from multiple FTP servers around the world, or you can download them as torrents, from people who seed them. Also, CentOS is available in two flavors:
- Minimal ISO: Provides the basic server, with essential packages
- Everything ISO: Provides the server and all available packages from the main repositories
First, head to the CentOS project link (https://www.centos.org/) and click on the Get CentOS Now button, as shown in the following screenshot:
Then, choose the minimal ISO image, and download it from any available download site.