Upgrade from Debian Stable to Debian Sid

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HOW TO UPGRADE DEBIAN "STABLE" TO DEBIAN "UNSTABLE SID"
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sudo mv /etc/apt/sources.list   /etc/apt/sources.list.old
sudo mv /etc/apt/sources.list.d   /etc/apt/sources.list.d.old
sudo mkdir /etc/apt/sources.list.d

sudo nano /etc/apt/sources.list
deb http://deb.debian.org/debian sid main contrib non-free
deb-src http://deb.debian.org/debian sid main contrib non-free
--exit
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade

--if there are problems
sudo apt update --fix-missing
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