Nguimjeu

Raspberry Pi + Ubuntu Server 21.10 + OLED Display

• Raspberry Pi 4 (8GB)
• Ubuntu Server 21.10 (64-bit server OS for arm64 architectures)
• Mini-tower case with SSD (NVMe M.2)
• 128×64 I2C OLED display

1. Make sure your system is up to date

seidler2547

# prerequisites:
## install software
apt install mariadb-server libmariadbclient-dev sqlite3
## install mysqlclient in virtualenv
su -c 'homeassistant/bin/pip3 install mysqlclient --upgrade' -l homeassistant
## create database
mysql -e 'CREATE SCHEMA IF NOT EXISTS `hass_db` DEFAULT CHARACTER SET utf8'
## create user (use a safe password please)
mysql -e "CREATE USER 'hass_user'@'localhost' IDENTIFIED BY 'hass_pw'"
mysql -e "GRANT ALL PRIVILEGES ON hass_db.* TO 'hass_user'@'localhost'"

jfstenuit

Hardware specs

Chinese Brand "ITworks" , Model TW891, distributed in France and Belgium by Darty

• CPU: Intel(R) Atom(TM) CPU Z3735F @ 1.33GHz
• Video: Intel® HD Graphics for Intel Atom® Processor Z3700 Series
• Screen: 1280x800
• WiFi + BT: Realtek RTL8723BS_BT
• Disks: mmcblk1: mmc1:0001 DF4032 29.1 GiB
• RAM: 2GB DDR3 @ 1333 MHz

sbonfert

#!/bin/sh
#
#  Read-only Root-FS for Raspian
#
#  Modified 2016 by Stefan Bonfert to make it compatible with Raspbian
#  Jessie (vanilla).
#
#  Modified 2015 by Pascal Rosin to work on raspian-ua-netinst with
#  overlayfs integrated in Linux Kernel >= 3.18.
#

mutability

- install the two shellscripts into the appropriate places under /etc/initramfs-tools
- run update-initramfs
- put "overlay=yes" on the kernel command line
- reboot

With the overlay in place, the real root is mounted readonly on /ro.
Only the root fs is changed, other filesystems are mounted normally.

Remove "overlay=yes" (or change it to something other than yes) and reboot to go back to readwrite.
(This probably means that you want the commandline config to live somewhere other than on the root fs, e.g. under /boot)