bookmark_borderINSTALL AND RUN FLASK(PYTHON) ON UBUNTU 19.04 on VpsServer

Flask is a lightweight WSGI web application framework. It is designed to make getting started quick and easy, with the ability to scale up to complex applications. It began as a simple wrapper around Werkzeug and Jinja and has become one of the most popular Python web application frameworks.

Step #0:
Signup (I appreciate if you use my referral link)
after your account becomes verified, create a Ubuntu 19.04 server.

Step #1:
Install python pip and flask by run:
$ sudo apt install python-pip
$ sudo apt install python3-pip
$ pip install -U Flask
$ pip3 install -U Flask

Step #2:
Add your project files on the server (ex. from GitHub using clone command)
in this tutorial let’s use a very simple flask app example that prints Hello, World! and save the app in (ex. /var/www/flask):

$ mkdir /var/www/flask
$ cd /var/www/flask
$ nano
copy below code and paste it in file using CTRL + SHIFT + V keys.

# file

from flask import Flask

app = Flask(__name__)

def hello():
    return "Hello, World!"

then press ( CTRL+ X )-> Y -> ENTER.

Step #3:
Run the server by run:
$ env flask run -h
change to your server ip


Serving Flask app ""
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on (Press CTRL+C to quit)