https://superuser.com/questions/1431677/cannot-update-raspberry-pi-apt-get


https://raspberrytips.com/update-raspberry-pi-latest-version/

Jessie	September 2015
Debian 9	Stretch	August 2017
Debian 10	Buster	June 2019
Debian 11	Bullseye	November 2021
Debian 12	Bookworm	June 2023


 --- cambiare da raspi os a debian
 nano /etc/apt/sources.list.d/raspi.list 
 commentare tutto
 
nano /etc/apt/sources.list 
deb http://deb.debian.org/debian bullseye main contrib non-free


# test su raspberry Saul
nano /etc/apt/sources.list.d/raspi.list 
# commentato tutto

nano /etc/apt/sources.list 
# cambiare quello che c'è già con versione corretta di debian (leggere sopra)
# una volta riavviato e ha preso versione aggiornata rifare con nuova versione

--- o versione attuale poi sempre
rm -r /var/lib/apt/lists/*
apt-get clean
apt update
apt upgrade -y
apt dist-upgrade
# oppure
apt full-upgrade
reboot


###per liberare spazio
apt remove wolfram-engine




--- sembra che sia jessie che è già installato di default
sudo -i
rm -r /var/lib/apt/lists/*
apt clean
apt-get update
apt upgrade -y
apt dist-upgrade
reboot

nano /etc/apt/sources.list
--- commentare tutte le righe
deb http://deb.debian.org/debian buster main contrib non-free
deb http://mirrordirector.raspbian.org/raspbian/ buster main contrib non-free rpi


rm -r /var/lib/apt/lists/*
apt-get clean
apt update
apt upgrade -y
apt dist-upgrade
reboot

nano /etc/apt/sources.list
--- commentare tutte le righe
deb http://deb.debian.org/debian bullseye main contrib non-free

apt update
apt upgrade -y
apt dist-upgrade
reboot

nano /etc/apt/sources.list
--- commentare tutte le righe
deb http://deb.debian.org/debian bookworm main contrib non-free

apt update
apt upgrade -y
apt dist-upgrade
reboot