http://status.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/opsec/linux/index.html
(Disclaimer: if you use closed-source hardware, like 99.9999999999% of people out there, you will invariably have to use non-free firmware too [1] [2] [3]) . If you want a purely FOSS host OS, and you are willing to not have firmware for your CPU, GPU, Motherboard, Ethernet/wifi, check out the OSes recommended by the Free Software Foundation [4] (but it will be at the expense of having your peripherals not working [5] ).