Light upgrade

Always begin with creating/attaching screen/tmux

tmux a
tmux
sudo su

On metered Internet connection, light upgrade scenario

Do not do update, as it will update minor version for repos, which will force bigger update

#! DO NOT DO IT (unless want to update minor version)

apt update

This will automatically lead to minor version upgrade (version variable will be substituted)

instead perform

apt upgrade raspi-copies-and-fills

apt upgrade raspi*