Relevant URL: https://my.minecraft.net/en-us/store/minecraft/#owned
When clicking on the "Download your distribution button", you are taken to a 404 page.
The url above is reached by clicking on the Linux icon above the Buy Minecraft button on the Minecraft game page
The proper page seems to be https://www.minecraft.net/en-us/download/
my.minecraft.net is no longer being used, closing.