Firewall

How to Configure an SMTP Server on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure an SMTP Server on Windows Server 2016

How to Configure Windows Server 2016 SMTP Server An SMTP (Simple Mail Transfer Protocol) server on Windows Server 2016 allows the server to send outbound email messages — for example, for application alerts, scheduled task notifications, or as a relay for internal applications. Windows Server 2016 includes an SMTP Server feature that can be configured […]

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

How to Install Munin Monitoring on Debian 9

Introduction Deploying install munin monitoring 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 Ensure Debian 9 […]

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How to Set Up IBM Spectrum Scale (GPFS) on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Set Up IBM Spectrum Scale (GPFS) 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 set up ibm spectrum scale (gpfs) on ibm aix […]

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How to Install and Use tmux on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install and Use tmux on Debian 9

Introduction This guide explains how to Install and Use tmux 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 […]

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How to Install and Configure Varnish Cache on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install and Configure Varnish Cache on FreeBSD 12

Introduction This guide explains how to Install and Configure Varnish Cache on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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How to Install pip and Manage Python Packages on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install pip and Manage Python Packages on Debian 9

Introduction This guide explains how to Install pip and Manage Python Packages 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 […]

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Common Problems 118999

Ubuntu 14.04 LTS – SSH connection refused after security hardening

🟠 High   ⏱ 5–30 min  Last verified: 23 September 2019 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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 […]

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How to Build Grafana Dashboards for FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Build Grafana Dashboards for FreeBSD 12

Introduction This guide explains how to Build Grafana Dashboards for FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained privilege […]

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How to Use lssrc, startsrc, and stopsrc on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use lssrc, startsrc, and stopsrc 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 use lssrc, startsrc, and stopsrc on ibm aix 7.2 […]

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