When I am writing a backup program for my minecraft server using python.

I find that when I want to use press backspace or arrow key, the input will not work properly.

Instead, it shows strange character like.

the solution is very simple

add import readline at the begining of the code will automatically fix the problem

转载iptable 原理

原文集: iptables

iptables详解（1）：iptables概念

防火墙相关概念

此处先描述一些相关概念。

从逻辑上讲。防火墙可以大体分为主机防火墙和网络防火墙。

主机防火墙：针对于单个主机进行防护。

网络防火墙：往往处于网络入口或边缘，针对于网络入口进行防护，服务于防火墙背后的本地局域网。

网络防火墙和主机防火墙并不冲突，可以理解为，网络防火墙主外（集体）， 主机防火墙主内（个人）。

从物理上讲，防火墙可以分为硬件防火墙和软件防火墙。

硬件防火墙：在硬件级别实现部分防火墙功能，另一部分功能基于软件实现，性能高，成本高。

软件防火墙：应用软件处理逻辑运行于通用硬件平台之上的防火墙，性能低，成本低。

那么在此处，我们就来聊聊Linux的iptables

add cdn for live2d models

now you can load live2d model faster.

Installation

1. apt install nginx

Config

1. sudo nano /etc/nginx/nginx.conf, in the file, add include /etc/nginx/conf.d/*.conf; in http. If the config file already have this line, ignore this step.

Adding ports

1. make sure you have ssh service installed properly.
2. sudo nano /etc/ssh/sshd_config to edit the config file
3. add new port by adding new line of "Port 2222" (in this case, 2222 is your new ssh port)
   
4. restart ssh service by using "sudo systemctl restart sshd.service"

Tags system not work properly with Chinese character.

The bug is fixed now.

The problem is caused by the url encoding.

To fix the bug, we could decode the url into Chinese again.

Solution below

import urllib
tag = urllib.parse.unquote(url)

安装

1. 安装aria2 brew install aria2
2. 创建配置文件 aria2.conf， 保存到任意位置.

购买服务器 (白嫖)

首先，打开白嫖连接: https://promotion.aliyun.com/ntms/act/campus2018.html

购买一个服务器，云服务器EMC和轻量应用服务器都行，购买完成后进入管理界面