authentication

How to Configure Telegraf Metrics Agent on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Telegraf Metrics Agent on Debian 10

Introduction Deploying configure telegraf metrics agent on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites You will […]

Read more
How to Configure Windows Server 2019 with Puppet — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 with Puppet

How to Configure Windows Server 2019 with Puppet Puppet is a widely-used configuration management tool that uses a declarative language to define the desired state of infrastructure. Windows Server 2019 is a first-class supported platform in Puppet, with a comprehensive set of built-in and community resource types covering Windows features, services, registry, files, users, packages, […]

Read more
How to Set Up Chef Infra Client on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Chef Infra Client on Debian 10

Introduction How to Set Up Chef Infra Client on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian […]

Read more
How to Secure MySQL 9 on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Secure MySQL 9 on Ubuntu 26.04

A default MySQL installation exposes several security risks — anonymous users, a test database, and root remote login. Beyond the initial security script, additional hardening significantly reduces your attack surface. This guide walks through a thorough MySQL 9 security hardening process on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 […]

Read more
How to Configure iSCSI Target and Initiator on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure iSCSI Target and Initiator on Debian 10

Introduction This guide explains how to Configure iSCSI Target and Initiator on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with […]

Read more
How to Configure Redis Cluster and Sentinel on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Redis Cluster and Sentinel on RHEL 9

A single Redis instance has two failure modes: if the server goes down, all cached data is lost and every request hits the origin database; and if the dataset grows beyond a single server’s RAM, there’s no built-in way to distribute it. Redis provides two solutions: Redis Sentinel for high availability (automatic failover with a […]

Read more
How to Configure dnsmasq on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure dnsmasq on Debian 10

Introduction This guide explains how to Configure dnsmasq on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard repositories […]

Read more
How to Install Docker CE on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Docker CE on Debian 10

Introduction How to Install Docker CE on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. This […]

Read more
How to Install Redis 7 on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Redis 7 on RHEL 10

Introduction This tutorial demonstrates how to Install Redis 7 on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream repositories enabled. […]

Read more
Common Problems 118477

Ubuntu 16.04 LTS clock drift and NTP synchronization failures

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

Read more
CHAT