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How To Install Python 3 and Set Up a Programming Environment on Ubuntu 20.04 [Quickstart]
This tutorial will walk you through installing Python and setting up a programming environment on an Ubuntu 20.04 server quickly.
openSUSE Leap 15.5 — python3-gunicorn — vulnerability — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.5 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2024:1440-1 (see also SUSE bugzilla) Related CVEs: CVE-2024-1135 Upstream summary: Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, […]
openSUSE Leap 15.5 — cobbler — vulnerability — patch and remediation guide
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.5 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2024:0370-1 (see also SUSE bugzilla) Related CVEs: CVE-2024-47533 Upstream summary: Cobbler, a Linux installation server that allows for rapid setup of network installation environments, has an improper authentication vulnerability starting in […]
CentOS Stream 10 – Common Problem 232 – Diagnosis and Fix
🟠 High ⏱ 5–30 min Last verified: 10 January 2025 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 […]
How to Configure HashiCorp Vault on CentOS Stream 10
Introduction Setting up configure hashicorp vault 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 HashiCorp Vault on CentOS Stream 10, with all the commands you need, the SELinux and firewalld considerations to keep in […]
Ubuntu 24.04 LTS – fail2ban bans do not take effect with nftables backend – Fix & Prevention
🟡 Medium ⏱ 5–30 min Last verified: 10 January 2025 Affected versions: Ubuntu 24.04 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 […]
How to Set Up TimescaleDB on CentOS Stream 10
Introduction How to Set Up TimescaleDB 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 […]
Ubuntu 24.04 LTS – root filesystem full causes service failures – Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 10 January 2025 Affected versions: Ubuntu 24.04 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 […]
Ubuntu 24.04 LTS – apt fails due to dpkg lock contention – Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 10 January 2025 Affected versions: Ubuntu 24.04 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 […]
Debian 11 — rear — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 10 January 2025 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2024-23301 Upstream summary: Relax-and-Recover (aka ReaR) through 2.7 creates a world-readable initrd when using GRUB_RESCUE=y. This allows local attackers to gain access to system secrets otherwise only readable […]
