Linux

Debian 11 — zoneminder — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — zoneminder — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 30 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-0227 CVE-2008-1381 CVE-2008-3880 CVE-2008-3881 CVE-2008-3882 CVE-2008-6755 CVE-2008-6756 CVE-2013-0232  +12 more Upstream summary: Buffer overflow in the zms script in ZoneMinder before 1.19.2 may allow a remote attacker to […]

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How to Set Up a Ceph Storage Cluster on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up a Ceph Storage Cluster on RHEL 7

How to Set Up a Ceph Storage Cluster on RHEL 7 Ceph is an open-source, software-defined storage platform that provides object, block, and filesystem storage in a single unified cluster. Unlike traditional SANs or NAS appliances, Ceph distributes data and metadata across commodity hardware using the CRUSH algorithm, eliminating single points of failure and scaling […]

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Oracle Linux 8 — ibus and glib2 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ibus and glib2 — security and stability fixes — required update (ELSA-2020-1880)

🟡 Medium   ⏱ 10–30 min  Last verified: 29 December 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1880 Related CVEs: CVE-2019-14822 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Configure Prometheus Alerting Rules on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Prometheus Alerting Rules on CentOS Stream 9

Introduction This tutorial demonstrates how to Configure Prometheus Alerting Rules on CentOS Stream 9 on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the […]

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How To Query Prometheus on Ubuntu 14.04 Part 2 — step-by-step Linux tutorial on Progressive Robot

How To Query Prometheus on Ubuntu 14.04 Part 2

Prometheus is an open source monitoring system and time series database. In part 2 of this series, you will build on the setup from the first part and learn more advanced querying techniques and patterns to apply value-based filtering, set operations, histograms, and more.

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Oracle Linux 8 — cloud-init — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — cloud-init — vulnerability — patch and remediation guide (ELSA-2021-3081)

🟡 Medium   ⏱ 10–30 min  Last verified: 29 December 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-3081 Related CVEs: CVE-2021-3429 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Install ClamAV Antivirus on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install ClamAV Antivirus on RHEL 8

ClamAV is an open-source antivirus engine widely used on Linux servers to scan for malware in email attachments, uploaded files, and shared storage directories. Although Linux malware is less common than its Windows counterpart, RHEL 8 servers often act as intermediaries that receive and redistribute files to mixed-OS environments, making antivirus scanning an important layer […]

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