Astra Linux is a GNU/Linux distributions developed by the Russians.
The distributions ISO files are distributed using kernel.org's "edge" mirrors with links like:
Use Within Russia
Very little is know about this distributions popularity in Russia. It is known that great leader Putin does not use it. He is a Windows XP man who uses Microsoft Windows XP both home and at work<ref>theguardian.com: Vladimir Putin 'still uses obsolete Windows XP' despite hacking risk, December 17th, 2019}}
It's homepage is at https://astralinux.ru/en/