Upgrade Raspbian To Buster

upgrade_raspbian_to_buster.sh

sudo sync
sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get -y dist-upgrade
sudo sed -i 's/jessie/buster/g' /etc/apt/sources.list
sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get -y dist-upgrade
sudo sync
#sudo reboot

The sed command may be insufficient. It's better to replace it with

grep -rl stretch /etc/apt/ | sudo xargs sed -i 's/stretch/buster/g'

to catch files in subdirectories as well.

Iptables seems to be broken after that

+1, iptables is broken because of nftables module who is missing in kernel folder

iptables[1126]: iptables/1.8.2 Failed to initialize nft: Protocol not supported

yes, because with Buster the default is now nftables and not xtables

can be fixed by:
sudo update-alternatives --set iptables /usr/sbin/iptables-legacy
sudo update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy

(or manually fixing the links in /etc/alternatives/)

yes, because with Buster the default is now nftables and not xtables

can be fixed by:
sudo update-alternatives --set iptables /usr/sbin/iptables-legacy
sudo update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy

(or manually fixing the links in /etc/alternatives/)

I'v tryed it, and it doesn't work, for my personal case, I had to symlink module folder to make the fix working.
sudo ln -s /lib/modules/4.19.58-v7+/ /lib/modules/4.19.57-v7+
then all is working great again.

I did the upgrade as well. Blogged about it here. https://marcofranssen.nl/upgrade-raspbian-stretch-to-raspbian-buster/

However few days later when I tried Kodi I figured it was broken. Probably caused by broken xserver for which I tried a lot to get it working again. I also noticed kodi on buster is version 17 while on stretch we are on 18.

For now I decided to switch back to stretch.
Blogged about that here.

https://marcofranssen.nl/install-fresh-raspbian-image-on-your-raspberry-pi-part-1/
https://marcofranssen.nl/install-fresh-raspbian-image-on-your-raspberry-pi-part-2/