How to activate backports repository on Raspberry Pi OS (Raspbian)
Add the following lines at the end of /etc/apt/sources.list:
sources.list
deb http://deb.debian.org/debian bullseye-backports main contrib non-free
deb-src http://deb.debian.org/debian bullseye-backports main contrib non-freeAfter that, run
apt_update.sh
sudo apt update
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