IT, Cloud & DevOps Blog

How to Tune Network Parameters with no on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Tune Network Parameters with no 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 tune network parameters with no on ibm aix 7.2 […]

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FreeBSD 12 — xtrlock — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — xtrlock — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 August 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: xtrlock — xtrlock does not block multitouch events Related CVEs: CVE-2005-0079 CVE-2016-10894 Upstream summary: Debian reports: xtrlock did not block multitouch events so an attacker could still input and thus […]

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How to Set Up Prometheus Windows Exporter on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up Prometheus Windows Exporter on Windows Server 2012 R2

How to Set Up Prometheus Windows Exporter on Windows Server 2012 R2 The Prometheus Windows Exporter (formerly known as wmi_exporter) is an open-source metrics collection agent that exposes Windows performance counters, WMI data, and system metrics in the Prometheus exposition format over HTTP. This makes Windows Server 2012 R2 natively scrapable by Prometheus, enabling integration […]

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How to Configure a RADIUS Server with NPS on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure a RADIUS Server with NPS on Windows Server 2016

How to Set Up Windows Server 2016 NPS RADIUS Network Policy Server (NPS) is the Microsoft implementation of a RADIUS (Remote Authentication Dial-In User Service) server and proxy. NPS provides centralized authentication, authorization, and accounting (AAA) for network access requests, including VPN connections, 802.1X wireless and wired authentication, dial-up, and remote access through RRAS. By […]

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What is the Relational Model? — step-by-step DevOps tutorial on Progressive Robot

What is the Relational Model?

The relational model is an abstract model used to organize data within a database. In order to control access to a database, write data, run queries, or perform any other tasks related to database management, a database management system must have some kind of underlying model that defines how…

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Oracle Linux 8 — ghostscript — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ghostscript — vulnerability — patch and remediation guide (ELSA-2019-2591)

🟠 High   ⏱ 15–60 min  Last verified: 17 August 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-2591 Related CVEs: CVE-2019-14812 CVE-2019-14813 CVE-2019-14817 CVE-2019-14811 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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How to Install and Configure Postfix Mail Server on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install and Configure Postfix Mail Server on RHEL 8

Postfix is a high-performance, security-focused Mail Transfer Agent (MTA) that ships with RHEL 8 and is the default replacement for Sendmail. It handles the delivery of outbound email and, when configured correctly, accepts inbound mail for local users. Understanding Postfix is foundational for any RHEL administrator who needs to send system alerts, application notifications, or […]

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How To Configure Apache Content Caching on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Configure Apache Content Caching on Ubuntu 14.04

Web caching is a method of improving server performance by allowing commonly requested content to be temporarily stored in a way that allows for faster access. This allows the visitor to access content faster without having to fetch the same data multiple times. By…

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