Getting Started Raspberry Pi 4 | Part 2 | Know Linux Image   In part1: we have installed Raspberry PI OS.  https://embeddedcraft.blogspot.com/2022/09/getting-started-raspberry-pi-1.html Once Linux OS is booted and running properly, let us review OS image.  We need to run following command and keep the output. this will be useful during development process... pi@raspberrypi:~ $ uname -a Linux raspberrypi 5.10.17-v7+ #1414 SMP Fri Apr 30 13:18:35 BST 2021 armv7l GNU/Linux pi@raspberrypi:~ $  pi@raspberrypi:~ $ df -h Filesystem      Size  Used Avail Use% Mounted on /dev/root        29G  6.7G   22G  24% / devtmpfs        430M     0  430M   0% /dev tmpfs           463M     0  463M   0% /dev/shm tmpfs           463M  6.3M  456M   2% /run tmpfs  ...