Alibaba Cloud server ubuntu16.04 deployment python3 django development environment encountered various problems

This article records the python3web development environment that took a day's spare time to deploy

After learning a little bit of front-end development knowledge, I learned about the Django framework. The study in the laboratory building was not enough to meet my exploration needs. I found more tutorials and hoped to knock out the code in the tutorials. I feel sorry for the idle server, and it takes a lot of energy to finish, and encounter various problems...

Alibaba Cloud server installation graphical interface

Test version centos7.3, ubuntu16.04

To install the graphical interface, you must first determine whether your server's performance is sufficient. See other people's tutorials are all 8M 4 cores. The
author's single core 1M, failed to install successfully.

centos7.3:
The answer provided by the Linux Commune.
After trying, I found that it failed. It may be a problem after the version 7.4, but Alibaba Cloud only provides centos version 7.3.

ubuntu16.04: Alibaba
Cloud (ECS)_Ubuntu_graphical interface installation_VNC remote access complete tutorial

Ubuntu16.04 switch to python3 by default

Just execute these two commands directly

sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 100

sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 150

Details:
How to set python3 as default in ubuntu16.04

Problem with hostname in ubuntu16.04

vim /etc/hosts

Add the second line in the figure

Remote connection problem

Putty connection generally occupies port 22 ssh connection. Might as well use xftp. After connecting with xftp, you can not only view the file list, but also directly open xshell for command line input. The default user name for the connection is root, and the login password can be set on the server console

ubuntu16.04 install phpstudy

Effective and detailed tutorial
on ubuntu16.04: Detailed tutorial on installing PHPstudy on Ubuntu17.04

The process is time-consuming. I used 23 minutes on the Alibaba Cloud server.

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When installing django, the pip command cannot be executed

First look at the version control, whether the corresponding version can run in the environment:
Note that django2.0.x can be used under python2.7

Correspondence between django version and python version

（sudo) pip3 install Django
或者 (sudo) pip3 install Django==2.2.7
安装显示pip没安装问题时

The installation is as follows, and the actual measurement is valid:


apt install python3-pip

ps: I switched the default python2 to python3>