web server

How to Set Up Software RAID with mdadm on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up the ELK Stack on Ubuntu 26.04

The ELK Stack (Elasticsearch, Logstash, Kibana) is a powerful log management and analytics platform. Elasticsearch stores and indexes logs, Logstash collects and transforms them, and Kibana provides visualisation dashboards. This guide installs the ELK stack on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS with at least 4 GB […]

Read more
Common Problems 124087

Oracle Linux 10 – Cockpit web console unavailable due to TLS certificate mismatch – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 6 June 2026 Affected versions: Oracle Linux 10 📖 ~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 […]

Read more
How to Configure Nginx Caching on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure Nginx Caching on FreeBSD 15

Introduction Deploying configure nginx caching on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports approach […]

Read more
How to Configure Nginx Server Blocks on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure Nginx Server Blocks on FreeBSD 15

Introduction Deploying configure nginx server blocks on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports […]

Read more
Common Problems 116069

Ubuntu 26.04 LTS – chrony and systemd-timesyncd run together causing time flapping

🟡 Medium   ⏱ 5–30 min  Last verified: 27 May 2026 Affected versions: Ubuntu 26.04 LTS Ubuntu 26.04 Ubuntu 26.04.1 📖 ~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 […]

Read more
How to Set Up a Git Server with Gitea on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install Ansible on Ubuntu 26.04

Ansible is an agentless IT automation tool that uses SSH and YAML playbooks to configure servers, deploy applications, and orchestrate complex workflows. It requires no agents on managed nodes — just SSH access and Python. This guide installs Ansible on Ubuntu 26.04 LTS and runs a first playbook. Tested and valid on: Ubuntu 26.04 LTS […]

Read more
How to Configure Static File Serving with Nginx on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Static File Serving with Nginx on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure static file serving with nginx both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Static File Serving with Nginx on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

Read more
How to Configure Nginx Server Blocks (Virtual Hosts) on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Secure Apache with Let’s Encrypt SSL on Ubuntu 26.04

Free SSL certificates from Let’s Encrypt, managed by Certbot’s Apache plugin, give your Apache-hosted domains HTTPS encryption with minimal configuration and fully automatic renewals. This guide covers the complete process on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server with Apache installed A registered domain name pointing to […]

Read more
How to Enable HTTPS with Let's Encrypt on Nginx RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Enable HTTPS with Let’s Encrypt on Nginx RHEL 10

Introduction This tutorial demonstrates how to Enable HTTPS with Let’s Encrypt on Nginx 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 […]

Read more
How to Set Up a Next.js 15 Application on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up a Next.js 15 Application on Ubuntu 26.04

Next.js 15 is a React framework that provides server-side rendering, static site generation, API routes, and the App Router. It is widely used for production React applications. This guide sets up and deploys a Next.js 15 application on Ubuntu 26.04 LTS with Node.js 22 and Nginx. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu […]

Read more
CHAT