Pi Lab

Setup Pi imager

1. Download the Raspberry Pi Imager to the local PC where you plug your SD card

   • Using command to install: sudo apt install rpi-imager

2. Mac user, spotlight search and run Raspberry Pi Imager

3. Select OS » SD card » Write

4. Insert SD card to Pi

   • Note: power supply level is key to boot up the pi, you might see pi is on but nothing comes up on the monitor

First time loading

1. Wait until Cloud-Init fully loaded, then login

    Default login and password: ubuntu 
        * first time login will prompt for password update 
   

2. Run sudo touch /etc/cloud/cloud-init.disabled to disable cloud-init

Config network and using Wifi for ssh

• Note: all config files are space sensitive

1. Run below command to config

    echo "network: {config: disabled}" > /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
   

2. Open 01-netcfg.yaml

    sudo vim /etc/netplan/01-netcfg.yaml
   

3. Add below content to 01-netcfg.yaml, ensure the indent space.

    network:
    version: 2
    renderer: networkd
    wifis:
        wlan0:
        dhcp4: true
        dhcp6: true
        optional: true
        access-points: 
            "my-wiki-name":
            password: "**********"
   

4. Run the below commands to enable the wifi network

    sudo netplan generate
    sudo netplan apply
    reboot
   

Hostname change & local hosts

1. Change hostname run: sudo vim /etc/hostname
2. Location for host file: /etc/hosts

Change to root user

sudo -i

Install net-tools

apt install net-tools 
    # error: Could not get lock /var/lib/dpkg/lock-frontend 
    # solution run below command: 
sudo killall apt apt-get

Get hostname and IP from the Pi

ifconfig 
    # Output of network 
hostname -I 
    # Output: hostname: 192.168.0.1

Change users

1. Run sudo -i to change to root, use passwd to change password
2. Add new user: adduser new-user-name
3. See user privilege: visudo

4. User privilege specification

    root    ALL=(ALL:ALL) ALL   
   

5. Add below to visudo to give new user with root privilege

    new-user-name   ALL=(ALL:ALL) ALL
   

SSH into raspberry PI

ssh [email protected]