Let's first fully upgrade our current Debian Stretch system:
# apt-get update # apt-get upgrade # apt-get dist-upgrade
Update Package Repository to Debian Buster
# sed -i 's/stretch/buster/g' /etc/apt/sources.list
Your /etc/apt/sources.list should look similar to the one below:
deb https://mirrors.tuna.tsinghua.edu.cn/debian buster main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian buster-updates main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian-security/ buster/updates main contrib non-free
Once the above /etc/apt/sources.list file edit is completed, use apt-get command to update packages index:
apt-get update
Upgrade to Debian Buster
The following below commands will upgrade your Debian 9 Stretch to Debian 10 Buster release.
# apt-get upgrade # apt-get dist-upgrade