Quick start

update OS
Install python3.9
Install Home Assistant core

# lsb_release -a

LSB Version: core-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch
Distributor ID: Ubuntu
Description: Ubuntu 18.04.6 LTS
Release: 18.04
Codename: bionic

~# python3.9 --version

Command 'python3.9' not found, but can be installed with:
apt install python3.9

part 1：Install home assisant core 2022.3.0 on Ubuntu 20.04

Step 1: update Ubuntu 18.04.6 LTS to Ubuntu 20.04 for home assisant core 2022.3.0

lsb_release -a

output

# lsb_release -a
LSB Version:	core-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.6 LTS
Release:	18.04
Codename:	bionic

Welcome to Ubuntu 18.04.6 LTS (GNU/Linux 4.15.0-162-generic x86_64)
New release '20.04.4 LTS' available.
Run 'do-release-upgrade' to upgrade to it.

sudo apt-get update 
sudo apt-get -y dist-upgrade 
 sudo apt-get update

reboot

do-release-upgrade

Step 2: Install Python 3.9 and the dependencies

sudo apt-get update
sudo apt-get upgrade -y

sudo apt-get install -y python3 python3-dev python3-venv python3-pip libffi-dev libssl-dev libjpeg-dev zlib1g-dev autoconf build-essential libopenjp2-7 libtiff5 libturbojpeg0-dev tzdata

sudo apt install python3.9
apt install python3.9-venv

python3.9 --version

output

root@vultr:~# python3.9 --version
Python 3.9.5

CREATE AN ACCOUNT

sudo useradd -rm homeassistant -G dialout,gpio,i2c

CREATE THE VIRTUAL ENVIRONMENT

sudo mkdir /srv/homeassistant
sudo chown homeassistant:homeassistant /srv/homeassistant

Create  a virtual environment for Home Assistant Core. 

sudo -u homeassistant -H -s
cd /srv/homeassistant
python3.9 -m venv .
source bin/activate

Python virtual environment + Home Assistant Core + Service

part 2：remote

buy a domain from www.namesilo.com step by step

Useful links

https://www.home-assistant.io/installation/linux#install-home-assistant-core