Fresh installation of Raspberian (RaspOS)

What is inside ?

free -h
df -hT

Install tmux (screen)

sudo su
apt install tmux

exit

tmux

sudo su

Install tools, utils

apt install \
    tcpdump \
    ncdu \
    htop

Update

apt update
apt upgrade

Remove not essential

apt remove \
    libcamera-ipa \
    librpicam-app1 \
    rpicam-apps-core