Linux

How to Configure SELinux Boolean Settings on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Configure SELinux Boolean Settings on CentOS Stream 10

Introduction Setting up configure selinux boolean settings on centos stream 10 on a CentOS Stream 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure SELinux Boolean Settings on CentOS Stream 10, with all the commands you need, the SELinux and firewalld considerations to […]

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Common Problems 127069

CentOS Stream 10 – Common Problem 236 – Diagnosis and Fix

🟡 Medium   ⏱ 5–30 min  Last verified: 30 December 2024 Affected versions: CentOS Stream 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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Common Problems 120021

Debian 12 – nftables Rules Missing After Reboot – Persistent Firewall Setup

🟠 High   ⏱ 5–30 min  Last verified: 30 December 2024 Affected versions: Debian 12 📖 ~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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How to Harden SSH on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Harden SSH on CentOS Stream 10

Introduction How to Harden SSH on CentOS Stream 10 on CentOS Stream 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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Common Problems 116399

Ubuntu 24.04 LTS Release Upgrade Stuck at Calculating Changes

🟡 Medium   ⏱ 5–30 min  Last verified: 30 December 2024 📖 ~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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Debian 11 — indent — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

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

🟢 Low   ⏱ 5–15 min  Last verified: 30 December 2024 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-40305 CVE-2024-0911 Upstream summary: GNU indent 2.2.13 has a heap-based buffer overflow in search_brace in indent.c via a crafted file. Table of contents Symptom & Impact Environment & […]

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Alpine Linux 3.20 — libssh — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — libssh — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 0.9.6-r0 📖 ~4 min read  •  Source: Alpine secdb entry — libssh 0.9.6-r0 Related CVEs: CVE-2021-3634 CVE-2020-16135 CVE-2020-1730 CVE-2019-14889 CVE-2018-10933 CVE-2023-6004 CVE-2023-6918 CVE-2023-48795 Upstream summary: Alpine community repository for vv3.20 ships libssh 0.9.6-r0 which addresses CVE-2021-3634. […]

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

Debian 11 — libjwt — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 December 2024 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2024-25189 Upstream summary: libjwt 1.15.3 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass authentication via a timing side channel. Table […]

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Alpine Linux 3.19 — pev — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — pev — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 0.82-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pev 0.82-r0 Related CVEs: CVE-2021-45423 Upstream summary: Alpine community repository for vv3.19 ships pev 0.82-r0 which addresses CVE-2021-45423. Table of contents Symptom & Impact Environment […]

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Ubuntu 20.04 — pillow-python2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — pillow-python2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 30 December 2024 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6744-2 Related CVEs: CVE-2024-28219 CVE-2022-24303 CVE-2022-45198 Upstream summary: USN-6744-1 fixed a vulnerability in Pillow (Python 3). This update provides the corresponding updates for Pillow (Python 2) in Ubuntu 20.04 LTS. […]

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