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Linux operations

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IT Xianyu
IT Xianyu
May 20, 2025 · Operations

Building a Three‑Server High‑Availability MySQL Cluster with HAProxy on Almalinux

This guide explains why three servers are needed for high availability, walks through hardware and software preparation, network configuration, MySQL master‑slave replication setup, HAProxy load‑balancing, and firewall/SELinux adjustments, providing complete command‑line examples for each step.

AlmaLinuxHAProxyHigh Availability
0 likes · 8 min read
Building a Three‑Server High‑Availability MySQL Cluster with HAProxy on Almalinux
Efficient Ops
Efficient Ops
Oct 8, 2023 · Operations

How to Migrate from CentOS: Ubuntu 22.04 & Anolis 8.6 Configuration Guide

With CentOS discontinued, this guide walks through the key considerations and step‑by‑step configurations for DNS, time synchronization, security baselines, SELinux, firewall, and kernel tuning on Ubuntu 22.04 and Anolis 8.6 as viable replacements.

AnolisCentOS migrationDNS configuration
0 likes · 12 min read
How to Migrate from CentOS: Ubuntu 22.04 & Anolis 8.6 Configuration Guide
macrozheng
macrozheng
Jan 13, 2021 · Operations

How to Build a Real‑Time Log Collector with Java and Tail – Why -F Beats -f

This article shows how to use the Linux tail command together with a simple Java program to collect logs in real time, explains the difference between tail -f and tail -F, demonstrates file rotation handling, and offers practical tips for reliable log monitoring.

JavaLinux operationsLog Collection
0 likes · 9 min read
How to Build a Real‑Time Log Collector with Java and Tail – Why -F Beats -f
OPPO Kernel Craftsman
OPPO Kernel Craftsman
Dec 18, 2020 · Fundamentals

Linux Kernel File Cache Mechanism: In-Depth Analysis of Read/Write Processes and Pre-reading Algorithm

The article thoroughly explains Linux kernel file cache, detailing how read() and write() operations traverse VFS to the block layer, the adaptive read‑ahead algorithm that pre‑loads sequential pages, the internal functions such as generic_file_buffered_read and ondemand_readahead, and outlines write handling and future topics on mmap and cache reclamation.

Kernel InternalsLinux kernelLinux operations
0 likes · 19 min read
Linux Kernel File Cache Mechanism: In-Depth Analysis of Read/Write Processes and Pre-reading Algorithm
Efficient Ops
Efficient Ops
Mar 25, 2019 · Operations

How to Achieve Real-Time Data Sync with rsync, inotify, and sersync on CentOS

This step‑by‑step guide shows how to set up two CentOS 7 virtual machines, install and configure rsync, inotify‑tools, and sersync, and combine them with scripts and cron jobs to obtain reliable, real‑time file synchronization and automated backups across the network.

CentOSLinux operationsbackup automation
0 likes · 17 min read
How to Achieve Real-Time Data Sync with rsync, inotify, and sersync on CentOS