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Technical Articles

Operation and Maintenance

CentOS's Legacy: Why It Was Discontinued

CentOS was terminated because RedHat shifted its focus to CentOSStream, which was used to speed up the RHEL development cycle and drive users to move to RHEL. Alternatives include: 1.RockyLinux, 2.AlmaLinux, 3.OracleLinux. Compatibility, support, and long-term planning are considered when choosing an alternative.

Apr 13, 2025 am 12:12 AM

CentOS Linux发行版

NGINX's Key Features: Performance, Scalability, and Security

NGINX improves performance through its event-driven architecture and asynchronous processing capabilities, enhances scalability through modular design and flexible configuration, and improves security through SSL/TLS encryption and request rate limiting.

Apr 13, 2025 am 12:09 AM

安全性能

Apache: An Introduction to the Web Server

ApacheHTTPServer is one of the most popular web servers on the internet and is popular for its stability, scalability and openness. Apache's core functionality is to process and respond to HTTP requests, and supports static and dynamic content services, proxying and load balancing. Its modular design allows for extended functionality by loading different modules, such as mod_rewrite for URL rewriting and mod_ssl for SSL/TLS encryption. Key concepts during installation include the httpd.conf configuration file and virtual host settings. Apache works by processing requests based on request URLs and configuration file rules, and optimizes server performance with a flexible modular architecture. Basic usage includes configuring virtual hosts

Apr 13, 2025 am 12:08 AM

apache web服务器

Understanding the Current macOS: A Concise Guide

macOSSonoma is the latest operating system version released by Apple in 2023. 1. It enhances the user experience through new features such as desktop widgets. 2. Rely on the SwiftUI framework to implement these functions. 3. The basic usage includes adding widgets. 4. Advanced usage such as using Automator to create workflows. 5. Common error handling includes checking system resources. 6. Performance optimization is recommended to clean the cache regularly.

Apr 13, 2025 am 12:02 AM

指南 macOS

How to check Debian OpenSSL configuration

This article introduces several methods to check the OpenSSL configuration of the Debian system to help you quickly grasp the security status of the system. 1. Confirm the OpenSSL version First, verify whether OpenSSL has been installed and version information. Enter the following command in the terminal: If opensslversion is not installed, the system will prompt an error. 2. View the configuration file. The main configuration file of OpenSSL is usually located in /etc/ssl/openssl.cnf. You can use a text editor (such as nano) to view: sudonano/etc/ssl/openssl.cnf This file contains important configuration information such as key, certificate path, and encryption algorithm. 3. Utilize OPE

Apr 12, 2025 pm 11:57 PM

apache nginx 工具系统版本

How to build a Hadoop development environment on Debian

This guide details how to build a Hadoop development environment on a Debian system. 1. Install Java Development Kit (JDK) First, install OpenJDK: sudoaptupdatesudoaptininstallopenjdk-11-jdk-yConfigure JAVA_HOME environment variable: sudonano/etc/environment at the end of the file (adjust the path according to the actual JDK version): JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64" Save and exit, and then execute: source/etc

Apr 12, 2025 pm 11:54 PM

apache red

How to do Hadoop resource management on Debian

Effectively managing Hadoop resources on the Debian system requires the following steps: Hadoop deployment: First, complete the installation and configuration of Hadoop on the Debian system. This includes necessary operations such as downloading Hadoop distribution packages, decompressing, setting environment variables, etc. Cluster configuration: After the installation is completed, configure the Hadoop cluster, covering the settings of HDFS (Hadoop distributed file system) and YARN (YetAnotherResourceNegotiator). You need to modify the core configuration file, such as: core-site.xml, hdfs-site.xml, mapred-site.x

Apr 12, 2025 pm 11:51 PM

red

What are the security settings for Debian Tomcat logs?

To improve the security of DebianTomcat logs, we need to pay attention to the following key policies: 1. Permission control and file management: Log file permissions: The default log file permissions (640) restricts access. It is recommended to modify the UMASK value in the catalina.sh script (for example, changing from 0027 to 0022), or directly set filePermissions in the log4j2 configuration file to ensure appropriate read and write permissions. Log file location: Tomcat logs are usually located in /opt/tomcat/logs (or similar path), and the permission settings of this directory need to be checked regularly. 2. Log rotation and format: Log rotation: Configure server.xml

Apr 12, 2025 pm 11:48 PM

apache 工具 tomcat 日志监控 spring security

How to interpret warnings in Tomcat logs

Warning messages in the Tomcat server logs indicate potential problems that may affect application performance or stability. To effectively interpret these warning information, you need to pay attention to the following key points: Warning content: Carefully study the warning information to clarify the type, cause and possible solutions. Warning information usually provides a detailed description. Log level: Tomcat logs contain different levels of information, such as INFO, WARN, ERROR, etc. "WARN" level warnings are non-fatal issues, but they need attention. Timestamp: Record the time when the warning occurs so as to trace the time point when the problem occurs and analyze its relationship with a specific event or operation. Context information: view the log content before and after warning information, obtain

Apr 12, 2025 pm 11:45 PM

tomcat 解决方法

How Tomcat logs help troubleshoot memory leaks

Tomcat logs are the key to diagnosing memory leak problems. By analyzing Tomcat logs, you can gain insight into memory usage and garbage collection (GC) behavior, effectively locate and resolve memory leaks. Here is how to troubleshoot memory leaks using Tomcat logs: 1. GC log analysis First, enable detailed GC logging. Add the following JVM options to the Tomcat startup parameters: -XX: PrintGCDetails-XX: PrintGCDateStamps-Xloggc:gc.log These parameters will generate a detailed GC log (gc.log), including information such as GC type, recycling object size and time. Analysis gc.log

Apr 12, 2025 pm 11:42 PM

工具 tomcat ai 日志监控

What is the impact of Debian Apache log on server performance

The impact of Apache logs on server performance under the Debian system is a double-edged sword, which has both positive effects and potential negative effects. Positive aspect: Problem diagnosis tool: Apache log records all requests and responses in detail on the server, and is a valuable resource for quickly locating faults. By analyzing the error log, configuration errors, permission issues, and other exceptions can be easily identified. Security Monitoring Sentinel: Access logs are able to track potential security threats, such as malicious attack attempts. By setting log audit rules, abnormal activities can be effectively detected. Performance Analysis Assistant: Access logging request frequency and resource consumption to help analyze which pages or services are most popular, thereby optimizing resource allocation. Combined with top or htop, etc.

Apr 12, 2025 pm 11:39 PM

apache 工具

How to use Debian Apache logs to improve website performance

This article will explain how to improve website performance by analyzing Apache logs under the Debian system. 1. Log Analysis Basics Apache log records the detailed information of all HTTP requests, including IP address, timestamp, request URL, HTTP method and response code. In Debian systems, these logs are usually located in the /var/log/apache2/access.log and /var/log/apache2/error.log directories. Understanding the log structure is the first step in effective analysis. 2. Log analysis tool You can use a variety of tools to analyze Apache logs: Command line tools: grep, awk, sed and other command line tools.

Apr 12, 2025 pm 11:36 PM

python apache access 工具 csv文件

Where is the Debian Nginx log path

In the Debian system, the default storage locations of Nginx's access log and error log are as follows: Access log (accesslog):/var/log/nginx/access.log Error log (errorlog):/var/log/nginx/error.log The above path is the default configuration of standard DebianNginx installation. If you have modified the log file storage location during the installation process, please check your Nginx configuration file (usually located in /etc/nginx/nginx.conf or /etc/nginx/sites-available/ directory). In the configuration file

Apr 12, 2025 pm 11:33 PM

nginx access ai

How to configure Debian Apache log format

This article describes how to customize Apache's log format on Debian systems. The following steps will guide you through the configuration process: Step 1: Access the Apache configuration file The main Apache configuration file of the Debian system is usually located in /etc/apache2/apache2.conf or /etc/apache2/httpd.conf. Open the configuration file with root permissions using the following command: sudonano/etc/apache2/apache2.conf or sudonano/etc/apache2/httpd.conf Step 2: Define custom log formats to find or

Apr 12, 2025 pm 11:30 PM

apache access 工具 ai

What is the role of Debian Apache logs on website security

The Apache log under the Debian system is crucial to website security, and its role is reflected in the following aspects: 1. Security event tracking and prevention Apache log records all website access requests, including information such as IP address, access time, request resource (URL) and HTTP status code. By analyzing these logs, you can: identify malicious activity: find suspicious access patterns, such as a short period of time large requests, frequent login failure attempts (brute force), SQL injection, or cross-site scripting attacks (XSS). Tracking the source of the attack: locate the attacker's IP address to provide a basis for taking defensive measures. Analyze attack patterns: Study historical log data, identify common attack patterns and trends,

Apr 12, 2025 pm 11:27 PM

apache 数据丢失