Prometheus and Grafana are two of the most widely adopted open-source tools for infrastructure monitoring and metrics visualization. Prometheus scrapes and stores time-series data from your systems, while Grafana turns that data into rich, interactive dashboards. Together they give RHEL 8 administrators a powerful, production-ready observability stack. This tutorial walks through installing both tools from […]
🟠 High ⏱ 15–60 min Last verified: 26 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-9129 Related CVEs: CVE-2021-3177 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
Learn how to install and configure MongoDB on Ubuntu, secure the database, manage the service, and verify your installation.
🟠 High ⏱ 15–60 min Last verified: 26 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2020-5805 Related CVEs: CVE-2019-19054 CVE-2019-19462 CVE-2020-10768 CVE-2020-10767 CVE-2020-10732 CVE-2020-12888 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read • Source: Arch ASA ASA-202107-19 Related CVEs: CVE-2021-32740 Upstream summary: Type: denial of service. Status: Fixed. Affected: 2.7.0-3. Fixed in: 2.8.0-1. Group: AVG-2136. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
🟡 Medium ⏱ 10–30 min Last verified: 25 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-0538 Related CVEs: CVE-2020-6829 CVE-2020-12400 CVE-2020-12403 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]
🟡 Medium ⏱ 5–30 min Last verified: 25 January 2021 Affected versions: Debian 9 📖 ~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 & […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read • Source: Arch ASA ASA-201611-11 Related CVEs: CVE-2016-6321 CVE-2021-20193 CVE-2018-20482 Upstream summary: Type: arbitrary file overwrite. Status: Fixed. Affected: 1.29-1. Fixed in: 1.29-2. Group: AVG-64. Table of contents Symptom & Impact Environment & Reproduction […]
🟢 Low ⏱ 5–15 min Last verified: 25 January 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4478-2 Related CVEs: CVE-2020-13757 Upstream summary: USN-4478-1 fixed a vulnerability in Python-RSA. This update provides the corresponding update for Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. Original […]
Replication is the practice of regularly copying data from one database to another so as to have a replica that always remains an exact duplicate of the primary instance. This tutorial outlines the process of using Redis’s built-in replication features to migrate data from one Ubuntu 18.04 server to another.
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