Installation 2023, Dec 15-17

  • Old SD card seemed corrupted
  • New installation necessary

https://ubuntu.com/tutorials/how-to-install-ubuntu-on-your-raspberry-pi

As soon as there is a connection to an ubuntu server: upgrade system

  • sudo apt update
  • sudo apt upgrade
  • sudo apt dist-upgrade
    (repeat after restart)

Install software:

  • sudo apt install build-essential
  • sudo apt install libboost-all-dev
  • sudo apt install libusb-1.0-0-dev
  • sudo apt install libv4l-dev

  • sudo apt install libopencv-dev



Old notes

Prepare SDCARD

  1. Download image: https://ubuntu.com/download/raspberry-pi
    https://cdimage.ubuntu.com/releases/20.04/release/ubuntu-20.04.4-preinstalled-server-arm64+raspi.img.xz
  2. Unzip the image: unxz ubuntu-22.04-preinstalled-server-arm64+raspi.img.xz
  3. Insert SDCARD, find where it is: lsblk -p
  4. MAKE SURE YOU HAVE THE CORRECT DEVICE!:
    sudo dd if=ubuntu-22.04-preinstalled-server-arm64+raspi.img of=/dev/sdc  bs=4M conv=fsync 

First Login

  1. The login username is "ubuntu", password is "ubuntu"  (it takes a bit until this user can login)
  2. adduser facet  (for e320pi it is e320)
  3. sudo usermod -a -G sudo facet
  4. sudo reboot now

Update system

Once an internet connection is established (see, e.g.,  "internet access via gateway computer"):

  1. sudo apt-get update
  2. sudo apt-get upgrade

In case there are issues with "hold back" packages:

sudo apt-get --with-new-pkgs upgrade

In case there are issues with unattended-upgr:

  1. get process id with "ps -e | grep unat
  2. sudo kill -9 "PID"

Setup name resolution

  • nano /etc/systemd/resolved.conf
    [Resolve]
  • DNS=1.1.1.1 8.8.8.8
  • service systemd-resolved restart
  • systemd-resolve --status

Change hostname

hostnamectl set-hostname new-hostname

Enable ssh

  1. sudo apt install ssh
  2. sudo systemctl enable --now ssh
  3. sudo systemctl status ssh

Configure firewall

  1. sudo ufw default deny incoming
  2. sudo ufw default allow outgoing
  3. sudo ufw allow ssh
  4. sudo ufw enable


Test

Connect the pi with a crossover cable to an ethernet adapter on a "gateway computer"

Install DHCP server on gateway computer:

subnet 192.168.110.0 netmask 255.255.255.0 {
range 192.168.110.200 192.168.110.250;
}

  • Check: sudo systemctl status isc-dhcp-server.service
  • ssh e320@172.25.77.100: connection should be possible
  • sysctl -w net.ipv4.ip_forward=1

Old notes

Connect pi with, e.g., USB3-Ethernet adapter to laptop via cross-over cable or network switch. On the pi:

  1. ip a (to list network interfaces)
  2. sudo ip addr add 192.168.0.8/255.255.255.0 dev eth0  (with correct device name for above)

On the gateway computer:

  • Install DHCP server
  1. ip a
  2. sudo ip addr add 192.168.0.42/255.255.255.0 dev enx00e04c680dc9 (with correct device name for above)

Mutual ping on both devices: ping 192.168.0.42 / ping 192.268.0.8

On the pi:

  1. Add route: sudo ip route add default via 192.168.0.42
  2. nano /etc/systemd/resolved.conf
    under "[Resolve]" make sure it reads:
    DNS=1.1.1.1 8.8.8.8

  3. service systemd-resolved restart

On the gateway computer:

  1. Use iptable to do the forwarding:sudo iptables -A FORWARD -o wlo1 -i enx00e04c680dc9 -s 192.168.0.0/255.255.255.0 -m conntrack --ctstate NEW -j ACCEPT (wlo1 is the network interface with internet access)
    sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
    sudo iptables -t nat -F POSTROUTING
    sudo iptables -t nat -A POSTROUTING -o wlo1 -j MASQUERADE


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