Linux

How to Install and Configure ISC DHCP Server on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install and Configure ISC DHCP Server on Debian 11

Introduction This guide explains how to Install and Configure ISC DHCP Server on Debian 11 on Debian 11 Bullseye. Debian Bullseye uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 11 install […]

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

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2022-0188)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-0188 Related CVEs: CVE-2021-4155 CVE-2022-0185 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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AlmaLinux 8 — audit — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — audit — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:2096 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Debian 11 — gpw — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — gpw — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-4931 Upstream summary: gpw generates shorter passwords than required Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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Common Problems 120583

Debian 11: MariaDB startup fails with InnoDB corruption

🔴 Critical   ⏱ 5–30 min  Last verified: 25 May 2022 Affected versions: Debian 11 📖 ~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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AlmaLinux 8 — gcc-toolset-13-gcc — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — gcc-toolset-13-gcc — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2025:1306 Related CVEs: CVE-2020-11023 Upstream summary: The gcc-toolset-13-gcc package contains the GNU Compiler Collection version 13. Security Fix(es): * jquery: Untrusted code execution via <option> tag in HTML passed to DOM manipulation […]

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Debian 11 — arb — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — arb — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-4941 CVE-2008-5378 Upstream summary: arb-common 0.0.20071207.1 allows local users to overwrite arbitrary files via a symlink attack on (a) /tmp/arb_fdnaml_*, (b) /tmp/arb_pids_*, (c) /tmp/arbdsmz.html, and (d) /tmp/arbdsmz.htm temporary […]

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Amazon Linux 2 — device-mapper-multipath — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — device-mapper-multipath — multiple vulnerabilities (2 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 ALAS2-2022-1883 Related CVEs: CVE-2022-41973 CVE-2022-41974 Upstream summary: multipath-tools 0.7.0 through 0.9.x before 0.9.2 allows local users to obtain root access, as exploited alone or in conjunction with CVE-2022-41973. Local users […]

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How to Set Up Horizontal Pod Autoscaling in Kubernetes on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up Horizontal Pod Autoscaling in Kubernetes on Debian 11

Introduction Deploying set up horizontal pod autoscaling in kubernetes on debian 11 on a Debian 11 Bullseye 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. […]

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Debian 11 — x11vnc — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — x11vnc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-29074 Upstream summary: scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user. Table of contents Symptom & Impact […]

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