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Table of Contents
Ubuntu on Raspberry Pi
Notes for configuring Ubuntu 20.04.1 LTS on Raspberry Pi.
Custom Ubuntu image
I currently use a customized Ubuntu image that includes the following modifications:
- Disabled resizing of partitions and filesystems to use entire SD card on first boot in cloud-init
- Disabled automatic patching of Ubuntu on first boot via cloud-init
- Add users, SSH keys, and sudo configuration for Ansible
First boot
On first boot you can find the Pi on the network from a DHCP server (or any other host that has an ARP cache for the subnet including this host) using the following:
#!/bin/bash echo "The following Raspberry Pi 4 devices have been found:" arp -a | grep dc:a6 # add MAC for other models...
Grow filesystem and disable cloud-init
After logging in you should reconfigure the filesystem and disable cloud-init to ensure that it does not automatically modify the filesytem or partitions in future updates.
# disable touch /etc/cloud/cloud-init.disabled # manually modify the partition table and grow the filesystem parted /dev/mmcblk0 resizepart # configure partition 2 as desired quit resize2fs /dev/mmcblk0p2 # optional: remove cloud-init completely apt-get purge cloud-init # if you do not remove cloud-init be sure not to allow your # configuration to be overwritten in future updates to the package
Another option is to create a small 1Mb partition after your root partition to ensure that it can never be grown into the empty space on your SD card.
Next do the following:
systemctl disable unattended-upgrades apt install python update-alternatives --config editor echo "$MYHOSTNAME" > /etc/hostname # don't forget to update /etc/hosts
Configure network interface for static use:
# /etc/netplan/99-static.yaml
network:
version: 2
renderer: networkd
ethernets:
eth0:
addresses:
- 10.1.2.1/24
gateway4: 10.1.2.1
link-local: [ ]
nameservers:
search: [subnet.quay.net, quay.net]
addresses:
- 10.1.2.3
To test this:
netplan try # if that works, remove any other config files and run: netplay apply
Ansible plays
ansible-playbook -l raspi.in.quay.net raspi_ubuntu.yml ansible-playbook -l raspi.in.quay.net chrony.yml
Add the following to Ansible plays in the future:
- dpkg-reconfigure tzdata
- default editor
- prune packages
- sshd config
- disable ubuntu account or remove
- configre motd
- apt install lm-sensors
- update sshd keys
Hardware notes
Quick reference for Raspberry Pi hardware tools on Ubuntu.