Firewall

How to Install kubeadm and Set Up a Kubernetes Cluster on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install kubeadm and Set Up a Kubernetes Cluster on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up install kubeadm and set up a kubernetes cluster on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow […]

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How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 7

How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 7 HAProxy is one of the most widely deployed open-source load balancers in production infrastructure, renowned for its high throughput, low latency, and fine-grained configurability. On RHEL 7 it is available directly from the base repositories and integrates cleanly with systemctl and firewalld. […]

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Common Problems 115528

RHEL 7 service mariadb Starts then Immediately Stops

🟡 Medium   ⏱ 5–30 min  Last verified: 28 March 2020 📖 ~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 […]

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How to Install PostgreSQL on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install PostgreSQL on Debian 9

Introduction This guide explains how to Install PostgreSQL on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with the standard repositories […]

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How to Install Cockpit Web Console on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Cockpit Web Console on Debian 10

Introduction This guide explains how to Install Cockpit Web Console 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 […]

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How to Configure Docker Networking on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Docker Networking on RHEL 7

How to Configure Docker Networking on RHEL 7 Docker provides a powerful networking model that allows containers to communicate with each other, with the host, and with the outside world in a secure and configurable way. Out of the box, Docker creates a default bridge network and manages its own iptables rules to control traffic […]

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How to Install and Configure ISC DHCP Server on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install and Configure ISC DHCP Server on Debian 9

Introduction Deploying install and configure isc dhcp server on debian 9 on a Debian 9 Stretch 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 […]

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How to Set Up Open-iSCSI on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Open-iSCSI on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up set up open-iscsi on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the […]

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How to Install Software with installp on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Install Software with installp on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to install software with installp on ibm aix 7.2 on […]

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How to Monitor Nginx with Prometheus nginx-exporter on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Monitor Nginx with Prometheus nginx-exporter on RHEL 8

Prometheus is a widely adopted open-source monitoring system that collects time-series metrics by scraping HTTP endpoints. Nginx does not expose Prometheus-format metrics natively, but the official nginx-prometheus-exporter bridges the gap by reading Nginx’s built-in stub status page and converting it into a format Prometheus understands. This tutorial shows how to enable the stub status module […]

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