Logging Monitoring

How to Configure Kubernetes Persistent Volumes on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Kubernetes Persistent Volumes on FreeBSD 12

Introduction Deploying configure kubernetes persistent volumes on freebsd 12 on a FreeBSD 12 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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Amazon Linux 2 — targetcli — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — targetcli — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2021-1591 Related CVEs: CVE-2020-13867 Upstream summary: An access flaw was found in targetcli, where the `/etc/target` and underneath backup directory/files were world-readable. This flaw allows a local attacker to access […]

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How to Set Up Uptime Robot Self-Hosted Monitor on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Uptime Robot Self-Hosted Monitor on Debian 10

Introduction Deploying set up uptime robot self-hosted monitor on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites […]

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Amazon Linux 2 — oniguruma — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — oniguruma — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2311 Related CVEs: CVE-2017-9226 CVE-2017-9227 CVE-2017-9228 CVE-2017-9229 CVE-2017-9224 CVE-2020-26159 CVE-2019-16163 CVE-2019-19012  +4 more Upstream summary: An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 […]

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Ubuntu 18.04 — libpcap — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libpcap — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 June 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4221-1 Related CVEs: CVE-2019-15165 Upstream summary: It was discovered that libpcap did not properly validate PHB headers in some situations. An attacker could use this to cause a denial of […]

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Arch Linux — crypto++ — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — crypto++ — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201912-3 Related CVEs: CVE-2019-14318 CVE-2016-7420 Upstream summary: Type: private key recovery. Status: Fixed. Affected: 8.2.0-1. Fixed in: 8.2.0-2. Group: AVG-1046. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Common Problems 117471

Ubuntu 20.04 LTS Kernel Upgrade Leaves Host in initramfs

🟠 High   ⏱ 5–30 min  Last verified: 24 June 2020 Affected versions: 20.04 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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Common Problems 117994

Ubuntu 18.04 external monitor not recognized

🟡 Medium   ⏱ 5–30 min  Last verified: 24 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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Common Problems 115604

Postfix Cannot Send Mail Due to Firewall Restrictions

🟡 Medium   ⏱ 5–30 min  Last verified: 24 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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openSUSE Tumbleweed — libXext6 — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libXext6 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2013:1099-1 (see also SUSE bugzilla) Related CVEs: CVE-2013-1982 Upstream summary: Multiple integer overflows in X.org libXext 1.3.1 and earlier allow X servers to trigger allocation of insufficient memory and a buffer overflow […]

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