DevOps Archives - Page 64 of 64 - ITFROMZERO

Docker Swarm Basics: A Complete Guide to Deploying Container Clusters from A to Z

By IT From Zero February 28, 2026

Docker Swarm frees you from the single-host trap: automatically distributes containers, scales with a single command, and performs zero-downtime rolling updates. This guide walks from a real-world problem to a fully working cluster setup, step by step.

Network

Setting Up a DNS Server with Bind9 on Ubuntu/Debian

By IT From Zero February 28, 2026

A step-by-step guide to setting up an internal DNS server with Bind9 on Ubuntu/Debian: installation, forward and reverse zone files, forwarder and ACL configuration, testing, and troubleshooting. Written from real-world experience managing an office network.

Database

Getting Started with Redis: Installation and Basic Usage — From 2 AM Production Crisis to Proficiency

By IT From Zero February 28, 2026

When a Django server starts timing out under heavy traffic, the culprit is often a database overwhelmed by repeated identical queries. This guide covers installing Redis on Linux, the essential commands you need to know, and how to integrate a cache layer into Python to immediately reduce database load.

Linux

How to Use tmux: Managing Multiple Terminals and Keeping Sessions Alive When SSH Drops

By IT From Zero February 28, 2026

tmux is a terminal multiplexer that lets you manage multiple terminals within a single SSH window and keep sessions alive even after losing your connection. This guide covers installation, essential shortcuts, and practical workflows for developers working with Linux servers.