Just having installed the latest and greatest version of Ubuntu for Raspberry Pi I realised that most likely my access to the shell from my iPad wouldn't work anymore. The setup I had put together previously and worked fine on Raspberry OS just didn't work anymore. Let me preface this by saying that I don't just install things by hand; I use Ansible wherever possible to ensure repeatability and reduce errors usually caused by manual setups. Suffice to say the Ansible setup ran successfully but didn't have the desired effect on the new OS... duh!
Sometimes I like just taking my iPad pro with me, no heavy MacBook or any other bulky paraphernalia for that matter. But I also like to be able to know that if push comes to shove I can still do some work without having to ssh into some system via the interwebs. Hence the somewhat odd sidekick to my iPad Pro: a Raspberry Pi 4 with 8gb of memory and a 512gb SD card... Why? you ask. Well why not if it is possible?!
The installation is relatively easy. Just follow the official instructions until you have a fully working Ubuntu running on your Raspberry Pi 4.
The following steps need to be executed on your SD card and the
system-boot directory. This can be done by taking the SD card out of the Pi, inserting it into a card reader connected to your computer. You should see a drive show up named
system-boot/comandline.txt, mine looks like this:
dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=LABEL=writable rootfstype=ext4 elevator=deadline rootwait modules-load=dwc2,g_ether g_ether.host_addr=<your-host-mac-addr> g_ether.dev_addr=<your-dev-mac-addr> fixrtc quiet splash
Then the following line needs to be added to
Also update your
system-boot/network-setup and add the following to the
usb0: dhcp4: false addresses: - 10.55.0.1/29 optional: true
This is all you need to do on your SD card for now. Eject the SD and put it back into your Raspberry Pi. Boot up and access it the way you did previously. You're going to need to install
dnsmasq and put the following configuration in place for it to be able to assign an IP address to anything connected via USB.
interface=usb0 dhcp-range=10.55.0.2,10.55.0.6,255.255.255.248,1h dhcp-option=3 leasefile-ro
If all of the above checks out you should be able to connect the PI to your iPad via USB and log in via ssh using an app like blink.
ssh firstname.lastname@example.org and you should be good to go...