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Technical Articles

Operation and Maintenance

What is the default port number for MySQL?

MySQL uses port number 3306 by default. The 3306 port number MySQL protocol uses the 3306 port number to connect to MySQL clients, utilities such as "mysqldump". It's a TCP, Transmission Control Protocol. Vulnerabilities Let's see if there are any vulnerabilities when using this default port - In general, port 3306 should not be opened as it could make the server vulnerable to attacks. If a user needs to connect to the database remotely, there are many other security options than opening port 3306. One of the security options includes using SSH tunneling. On the other hand, if port 3306 needs to be opened, the user must ensure that the IP addresses that can access the port are restricted so that untrusted hosts cannot

Sep 01, 2023 pm 09:41 PM

What are the types of PHP encapsulation protocols?

PHP encapsulation protocol types include file://, http://, ftp://, ssh2://, compress.zlib://, data://, etc. Detailed introduction: 1. file://, used to access files in the local file system. Through the file:// protocol, you can use PHP's built-in file operation functions to read and write files; 2. http://, used to access files. The encapsulation protocol of the HTTP protocol; 3. ftp://, the encapsulation protocol used to access the FTP protocol, etc.

Aug 29, 2023 pm 05:44 PM

封装协议 php

8 Best MySQLMariaDB GUI Tools for Linux Administrators

MySQL and MariaDB are two of the most popular open source relational database management systems (RDBMS) widely used by businesses and organizations around the world. As a Linux administrator, you need to have the appropriate tools to manage these databases efficiently. In this article, we will introduce eight of the best MySQL/MariaDBGUI tools for Linux administrators. phpMyAdmin phpMyAdmin is a web-based MySQL/MariaDBGUI tool that allows you to manage databases, tables and other database objects. It provides a simple and user-friendly interface that allows you to manage your database with ease. Using phpMyAdmin, you can create, delete

Aug 26, 2023 am 10:21 AM

What are the commonly used linux commands?

Commonly used Linux commands include ls command, cd command, pwd command, mkdir command, rm command, cp command, mv command, touch command, cat command, grep command, find command, chmod command, chown command, chgrp command, tar command, gzip command, unzip command, ps command, top command, kill command, ifconfig command, ping command, ssh command, scp and man commands, etc. Detailed introduction: 1. ls command, etc.

Aug 25, 2023 am 11:27 AM

Linux命令

It is recommended to collect 100 Linux interview questions with answers

This article has a total of more than 30,000 words, covering Linux overview, disk, directory, file, security, syntax level, practical combat, file management commands, document editing commands, disk management commands, network communication commands, system management commands, backup compression commands, etc. Dismantling Linux knowledge points.

Aug 23, 2023 pm 02:37 PM

java面试题

11 Quick Ways to Open Terminal in Windows 8

Windows Terminal is a multi-tab terminal emulator released in 2019 and comes pre-installed with Windows 11. In this guide, we will discuss some simple ways to open Terminal on Windows 11 with or without administrator rights. What is Windows Terminal in Windows 11? Windows Terminal is a feature-rich, modern hosting application capable of running any terminal in a separate tab. It is pre-configured to run command line tools such as Command Prompt, PowerShell, SSH, bash, AzureCloudShellConnector and WindowsSubsystemForLinux

Aug 22, 2023 pm 09:01 PM

Windows 应用程序终端

What is the command to exit without saving in Linux?

The Linux exit command without saving is "exit". When the user enters "exit" in the terminal, the system will perform the following steps: 1. Save the environment and status of the user's current session. The system will save the environment and status of the current session, including the current working directory, processes, variables, etc. Information; 2. Close the Shell process, which will cause the terminal window to close or the currently connected SSH session to terminate; 3. Return the exit status code. The exit status code is an integer value used to represent the exit status of the Shell session.

Aug 09, 2023 pm 02:13 PM

linux

What is the reason for failure to connect to the server?

The failure to connect to the server is caused by the failure to establish a connection with the server. The solutions are: 1. Check the network connection to ensure that the computer and server are connected normally; 2. Check the server status to ensure that it is powered on and the network service is running normally; 3. Check the firewall and configuration settings, and try to temporarily disable the firewall to test whether it works. Successfully connect to the server; 4. Check the configuration settings on the client and ensure that the correct server address, port number, user name, password and other information are used to establish the connection; 5. Try using different remote desktop software, FTP clients, etc.

Aug 08, 2023 am 10:06 AM

服务器

How do terminal commands in Kirin OS help you better manage your computer?

How do terminal commands in Kirin OS help you better manage your computer? Terminal command is an important tool in Kirin operating system, which can help users better manage their computers. Through terminal commands, users can perform various system operations, software installation, file management and other tasks, improving the efficiency and convenience of operating computers. This article will introduce some commonly used terminal commands and illustrate them with code examples. File and Directory Operation Commands The terminal commands in Kylin operating system allow users to conveniently operate files and directories. The following are some common

Aug 07, 2023 am 09:54 AM

终端命令：终端命令麒麟操作系统：麒麟OS 管理电脑：电脑管理

How to set up network proxy and firewall on Kirin OS?

How to set up network proxy and firewall on Kirin OS? In today's information age, network security has become a topic of great concern. When using Kirin operating system, network proxy and firewall settings are an important part of protecting the security of personal information. This article will introduce how to set up network proxy and firewall on Kirin operating system and provide corresponding code examples. 1. Network proxy settings Open the terminal, enter the command sudogedit/etc/environment, and open the environment variable configuration file. exist

Aug 07, 2023 am 08:45 AM

防火墙网络代理麒麟操作系统

How to realize automated deployment in PHP back-end function development?

How to realize automated deployment in PHP back-end function development? Introduction: With the rapid development of the Internet, the software development industry is also making continuous progress. In the actual development process, in order to improve development efficiency and project quality, automated deployment has become a very important technology. This article will focus on how to implement automated deployment in PHP back-end function development, and provide code examples for readers to learn from. 1. Why choose automated deployment? Improve efficiency: Traditional manual deployment requires manual operations such as copying files and configuring servers, which is time-consuming and easy

Aug 06, 2023 pm 01:13 PM

自动化部署功能开发 PHP后端

How to perform system security hardening and protection on Kirin operating system?

How to perform system security hardening and protection on Kirin operating system? With the development of technology and the popularity of the Internet, system security issues have become more and more important. Kirin operating system is an operating system independently developed by China and has the characteristics of independent controllability. System security reinforcement and protection on the Kirin operating system can effectively protect users' privacy and information security. This article will introduce some methods of system security hardening and protection on Kirin operating system, and provide corresponding code examples. 1. Update system patches. Update system patches in a timely manner.

Aug 04, 2023 pm 11:13 PM

安全加固（security hardening）系统防护（system protection）麒麟操作系统（Kyli

High-security configuration and firewall strategy for building Nginx servers

High-security configuration and firewall strategies for building Nginx servers. With the rapid development of the Internet, server security has received more and more attention. As an efficient and stable web server, Nginx's security configuration also needs our attention. In this article, we will explore how to configure your Nginx server for high security and introduce some firewall strategies. Using HTTPS protocol HTTPS is an encrypted transmission protocol based on TLS/SSL protocol, which can ensure the security of data during transmission.

Aug 04, 2023 pm 07:17 PM

nginx 安全性配置防火墙策略

How to set up network proxy and firewall on Kirin operating system?

How to set up network proxy and firewall on Kirin operating system? Kirin operating system is a Linux-based operating system widely used in government agencies, enterprises and institutions. For those users who need to set up network proxies and firewalls, Kirin OS provides a series of powerful tools and functions to meet their needs. This article will introduce how to set up network proxy and firewall on Kirin operating system, and provide corresponding code examples for readers' reference. 1. Network proxy settings and installation of proxy software in Kirin operating system

Aug 04, 2023 am 10:17 AM

防火墙网络代理麒麟操作系统