April 2020 - Page 28 of 66

Common Problems 121115

Debian 10 Kernel Upgrade Leaves Old Kernels Unmanaged

🟢 Low   ⏱ 5–30 min  Last verified: 20 May 2026 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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Arch Linux — hostapd — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — hostapd — multiple vulnerabilities (11 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-201710-23 Related CVEs: CVE-2017-13088 CVE-2017-13087 CVE-2017-13082 CVE-2017-13081 CVE-2017-13080 CVE-2017-13079 CVE-2017-13078 CVE-2017-13077  +3 more Upstream summary: Type: man-in-the-middle. Status: Fixed. Affected: 2.6-5. Fixed in: 2.6-6. Group: AVG-448. Table of contents Symptom […]

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How to Configure Hyper-V Checkpoints on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Hyper-V Checkpoints on Windows Server 2012 R2

How to Configure Hyper-V Checkpoints on Windows Server 2012 R2 Hyper-V checkpoints (formerly called snapshots) capture the state of a virtual machine at a specific point in time, allowing you to roll back to that state if a subsequent change causes problems. Windows Server 2012 R2 supports two types of checkpoints: Standard Checkpoints (which capture […]

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How to Install GCC and Build Essential Tools on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install GCC and Build Essential Tools on Debian 10

Introduction Deploying install gcc and build essential tools 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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FreeBSD 12 — trac — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — trac — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: trac — potential DOS vulnerability Related CVEs: CVE-2005-3980 CVE-2005-4065 CVE-2005-4305 Upstream summary: Trac development team reports: 0.11.2 is a new stable maintenance release. It contains several security fixes and everyone […]

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SLES 12 — libofx — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libofx — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:3007-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-9656 CVE-2017-14731 CVE-2017-2816 CVE-2017-2920 Upstream summary: An issue was discovered in LibOFX 0.9.14. There is a NULL pointer dereference in the function OFXApplication::startElement in the […]

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How to Install and Use Fluentd for Log Aggregation on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install and Use Fluentd for Log Aggregation on RHEL 7

How to Install and Use Fluentd for Log Aggregation on RHEL 7 Log aggregation is a critical discipline in any production environment: raw log files scattered across dozens of servers are nearly impossible to correlate during an incident. Fluentd, distributed as the td-agent package by Treasure Data, is an open-source data collector written in Ruby […]

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