This article provides a ready‑to‑use Bash script that, when placed in a system‑wide or user profile directory, automatically displays hostname, uptime, load average, IP address, CPU and memory usage, and disk mount statistics each time you log into a Linux server, along with color‑coded formatting and customization tips.
This guide lists the 14 Git commands that cover 99% of everyday development tasks, explains each command’s purpose, provides example usage such as initializing a repository, cloning, adding, committing, pushing, pulling, branching, merging, checking status, rebasing, stashing, and reverting, and even shows a simple shell script for summarizing repository information.
This guide lists frequent Jenkins problems such as missing libXrender.so.1 and SSH transferring zero files, explains why they occur, and provides exact yum commands, path-adjustment tips, and shell-parameter checks to resolve them.
This guide walks through installing Node plugins in Jenkins, configuring a NodeJS tool, creating a freestyle project, discarding old builds, setting up Git source, defining the build environment, running Yarn commands to compile the front‑end, and deploying the artifacts via SSH with a custom script.
This guide explains why using OAT to add a server can render yum unusable due to a broken Python interpreter, analyzes the underlying script logic that causes the failure, and provides two practical remediation methods—including fixing the Python symlink and adjusting the installation script—along with the full script for reference.
Learn how to install mydumper on various Linux distributions, use its multithreaded, compressed, and incremental backup features, and deploy a robust Bash script that automates full and incremental MySQL backups, handles encryption, cleanup, logging, notifications, and restoration with myloader.
This guide explains why MySQL backup verification is essential, outlines three pre‑restore checks, provides a step‑by‑step manual recovery procedure for single databases, and introduces a production‑grade Bash script that automates one‑click restoration with safety prompts and logging.
This guide presents a fully automated MySQL backup script that securely filters system databases, compresses backups with gzip, logs each operation, automatically removes expired files, and includes step‑by‑step configuration, deployment, scheduling, troubleshooting, and optimization tips for production environments.
This guide explains how to view Kubernetes certificates, check their expiration dates with kubeadm, renew them when needed, restart kubelet services, verify the renewal, and automate the whole process with a Bash script.
The article explains how inode exhaustion on Linux filesystems can cause "No space left on device" errors despite available disk space, details inode structure and allocation, provides step‑by‑step diagnostics, monitoring scripts, best‑practice recommendations, and recovery procedures to prevent and resolve inode‑related issues.
This guide presents a visual, configuration‑driven service manager for SpringBoot applications that streamlines start/stop operations, provides real‑time status and resource monitoring, offers intelligent log handling, supports batch actions, and includes an automated deployment and rollback workflow to improve operational efficiency and reliability.
This guide presents three practical, production‑grade methods to dynamically block IP addresses in Nginx—using OpenResty with Redis for millisecond response, fail2ban with log analysis for automated bans, and a pure‑shell file‑watch approach—each with step‑by‑step installation, configuration, and usage instructions.
The open‑source "reinstall" shell script automates full system reinstall across Linux, Windows, and NAS platforms with a single command, handling hardware detection, network configuration, and disk partitioning while offering customizable options and built‑in security features.
This guide shows how a single shell script can automatically detect the Linux distribution, install Docker CE using Alibaba Cloud mirrors, configure three domestic registry accelerators, and verify the installation, providing a fast and secure Docker environment for developers in China.
The open‑source "reinstall" shell script automates full‑system reinstall for Linux, Windows, and popular NAS platforms, handling hardware detection, network configuration, and disk partitioning with a single command, making VPS and server provisioning fast, secure, and hassle‑free.
This article provides a comprehensive, enhanced Docker automation Bash script—docker‑manager.sh—covering container lifecycle commands, image cleanup, backup, network inspection, log viewing, and configuration export, along with step‑by‑step usage instructions and additional handy Docker commands for efficient container management.
This guide presents an AI‑assisted workflow for Linux disk maintenance, including scripts for rapid diagnosis, risk assessment, personalized cleanup plans, safe log and cache removal, large‑file analysis, interactive cleanup modes, real‑time feedback, automated backups, and a one‑click execution script.
This article introduces a collection of shell scripts that automate system initialization across dozens of Linux distributions—including Rocky, AlmaLinux, CentOS, Ubuntu, Debian, openEuler, AnolisOS, OpenCloudOS, openSUSE, Kylin Server and UOS Server—detailing supported features, version‑specific OS compatibility, usage instructions, changelogs, and troubleshooting tips.
This guide explains why recent Redis versions require Python, shows how to install necessary dependencies, demonstrates using redis-cli --bigkeys and custom shell scripts to locate large keys, and outlines the risks and practical solutions for handling big keys in production.
This guide provides a comprehensive, step‑by‑step shell script that automates the installation, configuration, and service setup of MySQL 8.4 from source on a wide range of Linux distributions, including Rocky, AlmaLinux, CentOS, openEuler, Anolis, OpenCloudOS, Kylin, UOS, openSUSE, Ubuntu, and Debian.
This article introduces a comprehensive collection of shell scripts that automate system initialization across many Linux distributions—Rocky, AlmaLinux, CentOS, Ubuntu, Debian, openEuler, AnolisOS, OpenCloudOS, openSUSE, Kylin Server and UOS Server—covering network setup, hostname, repository configuration, firewall, SELinux, swap, timezone, kernel tuning, SSH, user environment and more, with detailed version changelogs and usage instructions.
This guide walks you through a Bash script that automatically checks for Ollama, installs it if missing, lets you choose a DeepSeek‑r1 model size, starts the Ollama service, and runs the selected model locally, complete with usage examples and a token‑cost note.
This guide presents a comprehensive Bash script that safely automates Linux system‑disk cleanup by removing APT caches, temporary files, old kernels, logs, browser caches, Snap packages, Docker data, and locating large files, while providing before‑and‑after disk usage reports.
This guide presents a systematic Linux network fault‑diagnosis process—including symptom identification, step‑by‑step use of ping, traceroute, port testing and DNS verification, advanced techniques, real‑world case studies, automation scripts, and best‑practice recommendations—to help operations engineers quickly locate and resolve network issues.
This guide walks through a complete automated deployment workflow—including Maven build, rsync transfer, graceful shutdown of Nginx and Eureka services, service restart, health checks, and final bring‑up of both Eureka and Nginx—using shell commands and parameterized variables.
This article presents a complete collection of shell scripts for initializing a wide range of Linux distributions—including Rocky, AlmaLinux, CentOS, Ubuntu, Debian, openEuler, AnolisOS, OpenCloudOS, openSUSE, Kylin Server, and Uos Server—detailing supported features, version‑specific updates, and step‑by‑step usage instructions.
This guide explains why Docker consumes disk space, describes the different resource types and their states, and provides practical commands and shell scripts to safely prune unused or dangling images, containers, volumes, and networks, helping developers keep their environments lean.
This article provides a step‑by‑step tutorial for DBAs to design a reliable MySQL backup strategy, write a Bash automation script, schedule it with cron, and perform restoration drills using Docker containers, while covering directory planning, command checks, cleanup, and common troubleshooting.
This guide explains how to set up an automated MySQL backup solution on AlmaLinux using Docker containers, a Bash script, and crontab, covering environment preparation, script creation, command checks, logging, error handling, and optional enhancements such as email notifications and security best practices.
This guide walks you through installing the Zabbix‑get client, deploying and managing Nginx on a Linux host, creating a shell script for status checks, adding a custom UserParameter, validating the checks from the Zabbix server, and configuring UI items and triggers to monitor Nginx availability.
This guide walks through the fundamentals of DevOps, illustrating how to transition from simple command‑line deployments to sophisticated, automated CI/CD pipelines using Jenkins, Docker, and shell scripts, while covering JVM tuning, version management, and common troubleshooting tips.
This article explains how Java developers can replace thousands of individual UPDATE statements with a single PostgreSQL stored procedure call, covering the motivation, procedure creation, Java invocation, scheduling with shell scripts, performance benchmarks, and common pitfalls.
This article introduces open‑source Linux server hardening scripts that meet Level‑3 security protection requirements, outlines the essential security controls such as identity verification, access control, auditing, and intrusion prevention, and provides step‑by‑step usage instructions for both checking and applying the protective scripts.
This guide explains the purpose of China's tiered security protection for Linux servers, outlines key requirements such as identity verification, access control, auditing, intrusion prevention, and provides step‑by‑step usage instructions for two open‑source scripts that automate checking and hardening on Red Hat/CentOS systems.
This article recounts a series of shocking operational mishaps—including a Kubernetes PV/PVC deletion that erased an entire codebase, a careless shell script that killed the wrong processes, a rookie’s risky server formatting, and a mysterious Excel crash—highlighting the importance of proper backups, testing, and change control.
This guide explains how to access Android SQLite databases via adb shell sqlite3, create and run complex shell scripts, and manage app permissions and users through ADB commands, providing practical examples for debugging and automation.
This guide walks through configuring Maven profiles to produce environment‑specific Spring Boot packages, using the maven‑assembly‑plugin to create a zip bundle, and operating a reusable shell script that can unzip, start, stop, and restart the jar on Linux.
This article introduces a comprehensive set of shell scripts that automate system initialization across dozens of Linux distributions, detailing supported features, version‑specific updates, usage instructions, and code examples for network, security, package management, and more.
This article explains how to run a Shell script within a Jenkins pipeline, capture its output, and present it through the Input step as a multi‑line text field for approval, illustrating the process with complete pipeline examples.
This guide explains how to use mysqldump to back up a single MySQL database, multiple databases, or all databases, includes options for specific tables, compression with gzip, adding drop statements, exporting only schema, and provides restore procedures and a sample automated backup script.
This article explains how to configure Maven profiles for different environments, use the maven‑assembly‑plugin and maven‑jar‑plugin to create a zip deployment package for a Spring Boot application, and provides a reusable shell script (shenniu_publish.sh) for extracting, starting, stopping, and restarting the service on Linux.
This guide walks through why nginx logs need daily rotation, demonstrates manual log splitting, provides a complete shell script for automated daily log rotation, explains logrotate configuration, and shows how to test and schedule the process with cron, ensuring clean and manageable log files.
When a Linux server's CPU spikes to 100%, this guide walks you through a systematic investigation—from identifying the high‑load process and pinpointing the offending Java thread to applying a streamlined shell script—so you can resolve the issue and restore normal performance.
This comprehensive tutorial walks you through Jenkins fundamentals, installation, JDK and Git integration, credential management, Maven setup, SSH password‑less login, and deployment scripts, providing all the commands and screenshots needed to automate Java project builds and releases.
This guide explains how to use the Linux md5sum command to generate checksums, compare files, store checksum data, and employ verification options like -c, --quiet, and --status for reliable file integrity checks in scripts and system operations.
The article explains the true purpose of the Linux kill command, compares signals like SIGTERM and SIGKILL, warns about the dangers of force‑killing processes, and provides practical Java shutdown‑hook examples and a shell script for safe, graceful termination.
Learn how to use Linux's built‑in Cron scheduler to create, configure, and run automated backup jobs, covering crontab syntax, time fields, script creation, permission setup, and redirection of output to /dev/null, with step‑by‑step commands and code examples.
Learn how to automate MySQL database backups on both Linux and Windows by using a Python script that leverages mysqldump on Linux and a batch file for Windows, including directory management, retention policies, and execution commands to keep your data safely archived.
This article explains how to package a Spring Boot application using Maven profiles and the assembly plugin, generate a zip deployment bundle, and deploy it on Linux with a custom shell script that supports start, stop, restart, and unzip operations.
This article provides step-by-step Bash scripts for automating daily MySQL database backups, compressing tables, cleaning old archives, and configuring master‑master replication, including detailed commands for dumping databases, creating tar.gz packages, and setting up replication parameters on Linux servers.
This guide provides step‑by‑step shell scripts, directory setups, cron jobs, and cleanup commands for reliable backup and restore of Oracle (RMAN and logical), MySQL (full, incremental, Percona XtraBackup), PostgreSQL (logical and physical with pg_rman), and openGauss databases, including retention policies and automation tips.
This guide explains how to use Linux's crontab command to create scheduled tasks, covering its features, common use cases, syntax details, example schedules, editing procedures, output redirection, and necessary script permissions for reliable automation.
This guide provides Bash scripts that let you retrieve detailed information about Linux processes by PID or name, query user account details, and apply a series of system hardening tweaks such as password policies, login restrictions, and file attribute protections.
This tutorial explains how to use the gzexe utility to encrypt a shell script, covering script preparation, making it executable, running gzexe to produce a compressed encrypted file, verifying and executing the encrypted script, optional decryption, and notes on security limitations and installation.
This guide explains how to encrypt a shell script using gzexe, covering script preparation, making it executable, running gzexe to produce an encrypted file, verifying and executing the encrypted script, and optionally decrypting it, plus installation instructions for gzexe on Debian and Red Hat systems.
This guide shows how to create a Bash script that backs up a specific MySQL database using mysqldump, compresses the dump, automatically deletes old backups, explains the find -mtime option, and schedules the process with cron, plus detailed steps for restoring the data.
This article walks through a real‑world incident where a data‑platform server showed near‑100% CPU usage, explains step‑by‑step investigation using top, pwdx, and jstack, identifies a time‑conversion utility as the root cause, and presents a streamlined script‑based solution that reduced CPU load by thirtyfold.
Learn how to protect your Linux server by blocking default SSH access on port 22 and allowing only specific IP addresses or ranges using iptables rules, with step-by-step shell script examples, rule inspection commands, and removal procedures for robust security.
This guide details how to use mysqldump and related commands to back up single or multiple MySQL databases, specific tables, compress backups, include drop statements, export only schema, and automate the process with scripts and cron jobs, plus instructions for restoring data.
This guide explains how to create a shell script that checks SSL certificate expiration dates and integrates it with Zabbix by configuring a user parameter, testing the script, and setting up monitoring items, triggers, graphs, and alerts to ensure services remain available.
This guide explains why nginx logs need regular rotation, demonstrates manual log backup and rotation using shell commands, provides a complete Bash script for daily log splitting, and shows how to configure and use the logrotate tool for automated, compressed log management.
This guide explains how to generate MD5 checksums for files, compare them to detect changes, save checksum lists, and use md5sum's verification options—including quiet and status modes—to script bulk integrity checks on Linux systems.
This article explains how to configure Husky Git hooks, especially pre‑commit and commit‑msg, to run custom shell scripts for code style checks, unit tests, and commit‑message validation, and shows how to reuse these scripts in CI pipelines for consistent code quality.
This article explains how to identify and extract large MySQL transactions from binary log files by monitoring binlog size, parsing GTID information, and using shell scripts to retrieve transaction details, timestamps, positions, and DML statistics, with optional use of the my2sql tool.
This guide shows how to use Zabbix to monitor database SQL results, binlog health, master‑slave replication, and how to clean up old Zabbix history with practical Bash scripts for MySQL/GreatDB and ClickHouse.
This guide provides complete shell scripts and step‑by‑step instructions for performing remote backups and restores of MySQL, Oracle, and PostgreSQL databases on Linux, including directory creation, compression, secure copy, cron scheduling, and cleanup of old backup files.
This guide explains four ways to create a local YUM repository on CentOS 7—using a Bash script, mounting an ISO image, configuring the official Aliyun mirror, and sharing the repository over a LAN with httpd—complete with commands, configuration files, and troubleshooting tips.
This article explains how to use Maven profiles and the Maven Assembly Plugin to create environment‑specific Spring Boot zip packages and provides a reusable shell script (shenniu_publish.sh) for extracting, starting, stopping, and restarting the packaged JAR on Linux, improving deployment efficiency.
This guide explains how to install the websocketd daemon, configure it to run shell scripts as WebSocket back‑ends, create simple HTML clients, monitor system memory in real time, and fine‑tune parameters such as static file serving, developer console, SSL, and Nginx proxying.
This guide shows how to replace tedious manual jar deployment with a simple one‑click CI/CD solution, providing stop and start shell scripts, Jenkins integration, and deployment automation to speed up testing and production releases.
This guide explains how to install lm_sensors, write a Bash script to retrieve CPU temperature, configure a Zabbix agent UserParameter, restart the agent, and set up a corresponding monitoring item on the Zabbix server, enabling automated CPU temperature monitoring.
This article explains how to use Maven profiles and the maven‑assembly‑plugin to create a zip package for a Spring Boot application, and provides a reusable shell script (shenniu_publish.sh) for deploying, starting, stopping, and managing the service on Linux.
This article explains how to use Shell scripts together with Excel VLOOKUP to extract OceanBase cluster Parameters, Variables, and ProxyConfig values, compare them against default or DBA‑tuned settings, and generate a report that highlights unexpected configurations for manual verification.
This guide explains why Logstash may import fewer rows from a large PostgreSQL table into Elasticsearch, and provides two practical solutions—ID comparison via shell scripts and accelerated comparison using Redis—to quickly identify and resolve data inconsistencies.
Learn step‑by‑step how to create an Nginx configuration file, use AWK and shell scripts to detect IPs with more than 60 requests per minute, automatically generate deny rules, and schedule the process with crontab to keep your personal site safe from attacks.
This article shows how a concise 10‑line shell script, created with ChatGPT, can continuously capture MySQL QPS, TPS, and connection counts and append the metrics to a log file for performance monitoring.
This guide explains why Logstash may import fewer rows than exist in a PostgreSQL table, and provides two practical methods—shell‑script ID comparison and Redis‑accelerated set operations—to reliably detect and troubleshoot missing records in Elasticsearch.
The article details how a midnight interface timeout in Vivo’s e‑commerce activity system was traced to a logging bottleneck: a synchronous Log4j call blocked all threads while a cron‑driven log‑rotation script copied a 2.6 GB file, and the issue was resolved by switching to asynchronous logging with a non‑blocking appender.
This article walks through why Linux servers need baseline hardening, explains baseline concepts and scanning, and provides a comprehensive collection of shell scripts that automatically check and enforce security settings such as password policies, file permissions, service configurations, and network controls.
This article presents a concise 10‑line Bash script, generated by ChatGPT, that gathers key Linux system metrics such as CPU, memory, disk usage, load average, network connections, log size, uptime, logged‑in users, process count, and current time.
This guide explains how to create an Nginx block list, use AWK to detect IPs with excessive requests, automate the process with a shell script, and schedule it via crontab to dynamically block offending IPs and return 403 responses.
This guide explains how to create an Nginx block file, use AWK to identify IPs that exceed 60 requests per minute, write a shell script to generate deny rules, and schedule the script with crontab to automatically block abusive IPs and return a 403 response.
This guide walks through setting up a Linux environment with a custom YUM repository, installing Google Chrome, and using headless Chrome commands to search, capture screenshots, and access Douyin pages directly from the command line.
This guide explains how to monitor disk usage on CentOS 7, collect snapshots with iostat, sar and pidstat, troubleshoot common errors, and finally use SystemTap to pinpoint the exact process that is writing to a specific file.
This guide explains how to reduce Spring Boot jar size by separating third‑party dependencies from business code, configure Maven for dependency splitting, use Jenkins to detect changes via MD5 checks, and deploy the resulting packages through SSH or Docker‑based pipelines.
This guide walks you through creating a Dockerfile to customize a Docker image, explains why Dockerfile‑based builds are preferred over docker commit, shows step‑by‑step commands for building, tagging, and running the image, and provides a Bash script to automate the full CI/CD lifecycle.
Easy Dump is a Bash‑based utility that streamlines PostgreSQL backups by wrapping pg_dump and pg_dumpall, offering multiple dump modes, parallel execution, table exclusion, automatic configuration generation, and detailed success or failure notifications for reliable database migration and maintenance.
This guide shows how to install mail utilities on CentOS 8, write a Bash script that checks disk usage, send threshold‑exceeding reports via email, and schedule the script with cron for continuous, automated monitoring of critical servers.
This guide explains how to configure Maven profiles and the assembly plugin to create a zip package for a Spring Boot application, then use a reusable shell script to unzip, start, stop, and restart the service on Linux, streamlining deployment across multiple environments.
This article explains how to package a Spring Boot application using Maven profiles and the maven‑assembly‑plugin, generate a zip release, and deploy it on Linux with a reusable shell script that handles unzip, start, stop, and restart operations.
This tutorial shows how to create a Bash script that continuously reports memory, disk, and CPU usage percentages, logs the data, and optionally applies a stress test to evaluate system performance under load.
This article demonstrates how to package a Spring Boot application using Maven profiles and the assembly plugin to create a zip distribution, and provides a reusable shell script (shenniu_publish.sh) for extracting, starting, stopping, and restarting the service on Linux environments.
This guide demonstrates how to configure Maven profiles for different environments, use the Maven assembly and jar plugins to create a zip package of a Spring Boot application, and deploy and manage the service on Linux using a custom shell script called shenniu_publish.sh.
This article explains how to use Maven profiles and the maven‑assembly‑plugin to create environment‑specific Spring Boot zip packages, configure the accompanying assembly.xml, and deploy them on Linux with a custom shenniu_publish.sh script that supports unzip, start, stop and restart operations.
This guide walks through installing PostgreSQL 14 on a CentOS server via a shell script, covering repository setup, package installation, initialization, user and database creation, remote‑connection configuration, firewall adjustments, service verification, and connecting with Navicat.
This guide shows how to use a shell script to check delivery windows, set up AutoJsPro on Android for automated ordering, and run a Python program for Sam's Club, providing practical automation tools for securing groceries during lockdowns.
This article walks through installing Jenkins, preparing the environment with JDK, Git, and Maven, configuring Jenkins plugins and a freestyle job, defining build parameters and shell scripts to clone a Gitee repository, build a Spring Boot jar with Maven, stop any running instance, and start the new application, followed by troubleshooting tips and a final summary.
Learn how to accurately determine your ISP‑assigned public IP address using simple shell commands, online services, and a robust Bash script that falls back between dig and curl with random host selection, ensuring reliable results for home‑based services and DDNS updates.
This article introduces a custom MySQL data consistency verification tool inspired by pt-table-checksum, explains the challenges of handling complex primary keys, details the implementation logic with shell scripts and SQL, and provides installation, configuration, and usage instructions including parallelism, network monitoring, and scheduling.
This article explains how to use Maven profiles and the maven‑assembly‑plugin to create environment‑specific zip packages for a Spring Boot application and provides a reusable shell script (shenniu_publish.sh) for extracting, starting, stopping, and managing the deployed JAR on Linux.
