Debian Upgrade

## First check version

cat /etc/debian_version
uname -a

## From Debian 8 (jessie) to 9 (stretch)

sed -i 's/jessie/stretch/g' /etc/apt/sources.list

apt update -y && apt upgrade -y
apt dist-upgrade

apt autoremove
reboot

## From Debian 9 (stretch) to 10 (buster)
sed -i 's/stretch/buster/g' /etc/apt/sources.list

apt update -y && apt upgrade -y

apt dist-upgrade

apt autoremove
reboot