Installing ERPNext version 13 on Ubuntu 20.10 ( 20+ or 21+ )

Updated document on ERPNext 14 is available on this link ( https://cloud.erpgulf.com/blog/support-forum/installing-erpnext-version-14-on-ubuntu-22+ ) 


apt-get update -y
init 6  ( will restart ) 

apt-get install libffi-dev python3-pip python3-dev  python3-testresources libssl-dev wkhtmltopdf gcc g++ make -y

curl -sL https://deb.nodesource.com/setup_14.x | bash -

apt-get install nodejs redis-server -y

apt-get install cron git -y

npm install -g yarn

apt-get install mariadb-server mariadb-client -y

mysql_secure_installation

Enter current password for root (enter for none): Press your [Enter] key, there is no password set by default
Set root password? [Y/n] Y
New password:
Re-enter new password:
Remove anonymous users? [Y/n] Y
Disallow root login remotely? [Y/n] Y
Remove test database and access to it? [Y/n] Y
Reload privilege tables now? [Y/n] Y

mysql -u root -p

MariaDB [(none)]>USE mysql;
MariaDB [(none)]>UPDATE user SET plugin='mysql_native_password' WHERE User='root';
MariaDB [(none)]> FLUSH PRIVILEGES;
MariaDB [(none)]> EXIT;

vim /etc/mysql/mariadb.conf.d/erpnext.cnf

Add these lines
[mysqld]
innodb-file-format=barracuda
innodb-file-per-table=1
innodb-large-prefix=1
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci

[mysql]
default-character-set = utf8mb4

systemctl restart mariadb

useradd -m -s /bin/bash erpnext

passwd erpnext

usermod -aG sudo erpnext

su - erpnext

vim ~/.bashrc
add this line
PATH=$PATH:~/.local/bin/

source ~/.bashrc

su - erpnext
sudo mkdir /opt/bench

sudo chown -R erpnext:erpnext /opt/bench

cd /opt/bench
yarn add node-sass
sudo apt install python3.8-venv

pip3 install --user frappe-bench
  bench init frappe-bench --frappe-branch version-13

cd frappe-bench
  sed -i '/web:/ s/$/ --noreload/' Procfile
  bench start >/tmp/bench_log &

bench new-site yourhost.example.com

At this point we have a frappe site running - bench start and you will get the website on port 8000. But ERPNext not yet installed. Let's continue

bench get-app erpnext --branch version-13
  bench install-app erpnext  ( if you have more than one site mention site name like " bench --site site1.local install-app erpnext "

bench start 

Now you have ERPNext on port 8000. ( http://yourhost.example.com:8000 )

You can run the setup-wizard on the browser. ( Setup-wizard often fail. Restart it again and again. This issue has been there since ages and yet to be fixed )

----- NOW deploy it in production mode - on nginx server -------

sudo apt install nginx supervisor 
sudo vim /etc/supervisor/supervisord.conf
Under [unix_http_server] section and also under [supervisord]
uncomment or add chown=erpnext:erpnext
bench setup supervisor --yes
  bench setup nginx

sudo ln -s `pwd`/config/supervisor.conf /etc/supervisor/conf.d/frappe-bench.conf
  sudo ln -s `pwd`/config/nginx.conf /etc/nginx/conf.d/frappe-bench.conf

sudo systemctl enable supervisor
  sudo systemctl enable nginx

-----------------------------

Make changes on site_config.json ( inside site/site_name folder ) 
To make it non-development mode 
 "developer_mode": 0,
To reflect the hostname and port 

sample below.
{
 "db_name": "_7beb69e70202137e",
 "db_password": "GiZeZxy4GPxfTzFA",
 "db_type": "mariadb",
 "developer_mode": 0,
 "encryption_key": "iVahvGBPKPWWYQwqyxxxxxx7dMazzSX4SEClEtDzdQ=",
 "user_type_doctype_limit": {
  "employee_self_service": 10
 },
  "host_name": "https://mysite.erpgulf.com:1203"
}

--------------------

restart the system - init 6 

--------------

Now Letsencrypt and SSL

--------------------------

It's explained here https://erpgulf.com/blog/support-forum/letsencrypt-on-ubuntu-version-20-for-erpnext