Woolfy025/OpenBSD_on_a_RP4.md

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Created September 29, 2024 03:54

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OpenBSD on a Raspberry Pi 4

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OpenBSD_on_a_RP4.md

OpenBSD on a Raspberry Pi 4B

Minimalist installation of OpenBSD on a Raspberry Pi 4

Ingredients

Raspberry Pi 4 Model B
OpenBSD 7.3 arm64 image
1 USB flash drive
1 ssd
USB to TTL Serial Adapter
Done with a macOS Ventura 13.5.1 box, but almost any would do

Installation

Follow the intructions to Download the OpenBSD arm64 image or get it from your favorite mirror

% curl -O https://ftp.eu.openbsd.org/pub/OpenBSD/7.3/arm64/miniroot71.img
% curl -O https://ftp.openbsd.org/pub/OpenBSD/7.3/arm64/SHA256
% shasum -a 256 -c --ignore-missing SHA256

Create the install media:

identify the USB flash with diskutil list
unmount it diskutil unmountDisk disk4, obviouslly disk4 was my case not necessary yours
# dd if=miniroot.img of=/dev/disk4

Prepare the RP3 with the USB drives connected and the internet connection ready
Connect the USB Serial Adapter to your computer this way:
Access to the terminal with # cu -l /dev/cu.usbserial-110 -s 115200 | tee /tmp/cu.log

Start the RP3 and follow the OpenBSD install instructions

Welcome to the OpenBSD/arm64 7.3 installation program.
(I)nstall, (U)pgrade, (A)utoinstall or (S)hell?

Remarks

Notice that once installed not all USB drives are fast enought to boot OpenBSD on a RP4
find out your usbserial typing and using the tab on /dev/cu.usbserial

Sources

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