Logging Monitoring

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

How to Install Jenkins on RHEL 8

Jenkins is the most widely used open-source automation server for building, testing, and deploying software. On Red Hat Enterprise Linux 8, setting up Jenkins provides a stable CI foundation backed by enterprise-grade OS support. This tutorial walks through installing Jenkins on RHEL 8 using the official package repository, configuring the firewall, and completing the initial […]

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Common Problems 121003

Debian 10: SSH access denied after sshd Match rule change

🔴 Critical   ⏱ 5–30 min  Last verified: 4 June 2020 Affected versions: Debian 10 📖 ~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 & […]

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openSUSE Tumbleweed — python36-bottle — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-bottle — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory Related CVEs: CVE-2016-9964 Upstream summary: redirect() in bottle.py in bottle 0.12.10 doesn't filter a "rn" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233rnSet-Cookie: name=salt") call. Table of […]

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Common Problems 118481

Ubuntu 16.04 LTS – apt update fails with Hash Sum mismatch – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 4 June 2020 Affected versions: Ubuntu 16.04 LTS 📖 ~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 […]

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FreeBSD 12 — mplayer-gtk2-esound — multiple vulnerabilities (15 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — mplayer-gtk2-esound — multiple vulnerabilities (15 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mplayer — vulnerability in STR files processor Related CVEs: CVE-2004-0433 CVE-2004-1187 CVE-2004-1188 CVE-2005-1195 CVE-2006-1502 CVE-2006-6172 CVE-2007-1246 CVE-2007-2948  +7 more Upstream summary: Secunia reports: The vulnerability is caused due to a […]

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FreeBSD 12 — drm-fbsd11.2-kmod — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — drm-fbsd11.2-kmod — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 4 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: drm graphics drivers — potential information disclusure via local access Related CVEs: CVE-2019-0154 CVE-2019-11112 CVE-2019-14615 Upstream summary: Intel reports: .A potential security vulnerability in Intel(R) Processor Graphics may allow information […]

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Common Problems 117414

Ubuntu 20.04 LTS DNS Resolution Failure with systemd-resolved

🟡 Medium   ⏱ 5–30 min  Last verified: 4 June 2020 📖 ~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 & Cross-Refs References & Further […]

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FreeBSD 12 — py37-pyrad — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py37-pyrad — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pyrad — multiple vulnerabilities Related CVEs: CVE-2013-0294 CVE-2013-0342 Upstream summary: Nathaniel McCallum reports: packet.py in pyrad before 2.1 uses weak random numbers to generate RADIUS authenticators and hash passwords, which […]

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Debian 9 — openldap — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — openldap — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 June 2020 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-12243 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 the AIX Firewall with IPFilter on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure the AIX Firewall with IPFilter 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 configure the aix firewall with ipfilter on ibm aix […]

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