system-setup

System Setup

This document describes how to install Linux on the Raspberry Pi's SD-card and how to set it up for running the examples.

Copy the raspbian image to an SD-card

Download the Raspbian Stretch Lite image and unzip it.

Before inserting the SD-card into your computer, in order to determine the block device name of the SD-card, run

$ watch -dn1 cat /proc/partitions

Now insert the SD-card and you should see such lines popping up

179        0   31166976 mmcblk1
179        1      44927 mmcblk1p1
179        2   31117824 mmcblk1p2

which means that the SD-card is identified as /dev/mmcblk1 on your system and this is what we'll use in the next commands:

$ sudo umount /dev/mmcblk1*
$ sudo dd if=/tmp/2018-11-13-raspbian-stretch-lite.img of=/dev/mmcblk1
$ sudo sync

Remove the SD-card from your computer.

Make the Raspberry Pi accessible via SSH

Insert the SD-card into the Raspberry Pi and plug:

• an HDMI screen,
• an USB keyboard,
• power over Micro-USB.

Log in (user: pi, password: raspberry).

Configure WiFi

In /etc/wpa_supplicant/wpa_supplicant.conf write:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=DE

network={
  ssid="myssid"
  psk="mypassword"
}

Enable SSH

$ sudo systemctl enable ssh
$ sudo systemctl start ssh

Change the hostname

In /etc/hostname and /etc/hosts replace raspberrypi by e.g. dk-0001 and reboot.

Enable the SPI driver

In /boot/config.txt uncomment

dtparam=spi=on

and reboot.

Allow user to perform GPIO operations

sudo usermod -aG gpio pi

Close your SSH session and re-open it.