chris

How To Install and Setup Elgg on a Debian or Ubuntu VPS — step-by-step Linux tutorial on Progressive Robot

How To Install and Setup Elgg on a Debian or Ubuntu VPS

Elgg is an award winning PHP engine for running your own full fledged social network. It has great community support in the form of plugins and themes made by official developers and the user community. Here’s how to install and setup Elgg on a Debian or Ubuntu VPS.

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How To Deploy Multiple PHP Applications using Ansible on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Deploy Multiple PHP Applications using Ansible on Ubuntu 14.04

This tutorial is the third in a series about deploying PHP applications using Ansible on Ubuntu 14.04. In this tutorial, we will build on what we learned in the previous tutorials by transforming our single-application Ansible playbook into a playbook that supports deploying multiple PHP applications on one or multiple servers.

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

Oracle Linux 8 — openssl — vulnerability — patch and remediation guide (ELSA-2021-1024)

🟠 High   ⏱ 15–60 min  Last verified: 23 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1024 Related CVEs: CVE-2021-3449 CVE-2021-3450 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Gentoo Linux — net-libs/libetpan — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-libs/libetpan — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202007-55 Related CVEs: CVE-2020-15953 Upstream summary: It was discovered that libetpan was not properly handling state within the STARTTLS protocol handshake. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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How to Set Up Spinnaker on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Spinnaker on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up spinnaker on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Spinnaker on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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Oracle Linux 8 — nodejs:12 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nodejs:12 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-3073)

🟡 Medium   ⏱ 10–30 min  Last verified: 22 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-3073 Related CVEs: CVE-2021-23362 CVE-2021-27290 CVE-2021-22918 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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AlmaLinux 8 — udftools — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — udftools — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:4218 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Common Problems 113595

Windows Server 2012 R2 — Windows Firewall ruleset regression blocks east-west traffic after GPO refresh — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 22 May 2021 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

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How to Set Up a LAMP Stack on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up a LAMP Stack on SLES 12

Introduction This tutorial covers How to Set Up a LAMP Stack on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: […]

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