Download Debian GNU/Linux 11.5
According to the Debian Free Software Guidelines,
1. Free Redistribution
The license of a Debian component may not restrict any party from selling or giving away the software as a component of an aggregate software distribution containing programs from several different sources. The license may not require a royalty or other fee for such sale.
Our understanding of this statement is that every Debian mirror site is an official Debian mirror site. We encourage Debian Developers and users to create your own official mirror site like this and distribute Debian to your family and friends.
