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Installing and Configuring NTP Server on Linux: Fixing Time Sync Issues in Production

By admin March 2, 2026

A guide to installing chrony and configuring internal NTP server/client on Linux, drawn from real production operations experience. Covers cluster configuration, firewall setup, offset verification, and a basic monitoring script.

Network

Configuring IPv6 on Linux Servers: Static Addresses, Dual-Stack, and Real-World ip6tables

By admin March 2, 2026

Step-by-step guide to configuring IPv6 on Linux servers: enabling IPv6, assigning static addresses on Ubuntu/Debian and CentOS/Rocky, setting up dual-stack, ip6tables firewall, and troubleshooting real-world issues.

Ubuntu

Installing and Configuring Samba on Ubuntu: File Sharing with Windows

By admin March 1, 2026

A practical guide to installing and configuring Samba on Ubuntu 22.04 for sharing files with Windows machines on a local network. Covers smb.conf configuration, user creation, directory permissions, firewall setup, and connection monitoring.

Security

Certbot SSL Certificate: Install and Auto-Renew in 5 Minutes

By admin March 1, 2026

A practical guide to using Certbot to issue and manage free SSL certificates from Let's Encrypt. From a quick 5-minute setup to automatic renewal and troubleshooting common errors on Linux servers.

Linux

Managing Users and Permissions on Linux: Practical Tips for Beginners

By admin March 1, 2026

A comparison of useradd vs adduser, octal vs symbolic chmod, and how to configure sudo safely on Linux. Practical insights from 3 years of VPS management — helping beginners avoid the most painful user and permission mistakes.

Virtualization

KVM Installation and Usage Guide on Ubuntu: From Zero to Your First Virtual Machine

By admin March 1, 2026

KVM is a hypervisor built into the Linux kernel, offering better performance than VirtualBox and remaining stable after kernel updates. This guide covers installing KVM on Ubuntu, creating VMs from ISO using virt-install, and managing VMs daily with virsh — suitable for both servers and desktops.

MySQL

MySQL Master-Slave Replication Setup: From Real Incidents to Solutions

By admin March 1, 2026

A complete guide to MySQL Master-Slave Replication from start to finish, solving database overload and single point of failure. Covers each step from configuring Binary Log and creating the replication user to connecting and verifying the Slave.

Virtualization

Configuring Network Bridge and TAP Interface for KVM on Linux — Hands-On from the Homelab

By admin March 1, 2026

A guide to configuring a network bridge (br0) and TAP interface for KVM virtual machines on Linux — from concept to hands-on practice with Netplan and libvirt. VMs get a real IP on the LAN, connecting directly like a physical machine, no NAT involved.

Virtualization

How to Use Vagrant for a Consistent Dev Environment — No More ‘Works on My Machine’

By admin March 1, 2026

Vagrant standardizes dev environments with a Vagrantfile committed to git — putting an end to the 'works on my machine' problem. This article compares manual VMs, Docker, and Vagrant, analyzes when to use each, and provides a step-by-step setup guide from a single VM to a multi-machine production simulation.

Database

Optimizing PostgreSQL Performance with PgBouncer: Connection Pooling in Production

By admin February 28, 2026

A guide to installing and configuring PgBouncer to address connection overhead in PostgreSQL. Real-world experience after 6 months in production: server connections reduced from 180 to 25, API response time improved from 800ms to under 300ms.