Linux

Common Problems 117975

Ubuntu 18.04 LTS – cloud-init keeps overwriting network config

🟡 Medium   ⏱ 5–30 min  Last verified: 12 December 2019 Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6 📖 ~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 […]

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Alpine Linux edge — gdnsd — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — gdnsd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.4.3-r0 📖 ~4 min read  •  Source: Alpine secdb entry — gdnsd 2.4.3-r0 Related CVEs: CVE-2019-13952 Upstream summary: Alpine community repository for vedge ships gdnsd 2.4.3-r0 which addresses CVE-2019-13952. Table of contents Symptom & Impact Environment […]

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SLES 15 — zoo — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — zoo — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 12 December 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SR:2006:005 (see also SUSE bugzilla) Related CVEs: CVE-2006-0855 CVE-2007-1669 Upstream summary: Stack-based buffer overflow in the fullpath function in misc.c for zoo 2.10 and earlier, as used in products such as Barracuda […]

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How to Set Up a CI/CD Pipeline with Tekton on Kubernetes on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up a CI/CD Pipeline with Tekton on Kubernetes on RHEL 8

Tekton is a Kubernetes-native CI/CD framework that models each stage of a pipeline as a custom resource, making pipelines portable, reproducible, and version-controlled alongside application code. On RHEL 8 with a running Kubernetes cluster, Tekton integrates directly with kubectl and requires no separate CI server to manage. This tutorial covers installing the Tekton Pipelines CRDs, […]

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Como Instalar o Nginx no Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

Como Instalar o Nginx no Ubuntu 18.04

Uma versão anterior desse tutorial foi escrita por Justin Ellingwood O Nginx é um dos servidores web mais populares no mundo e é responsável por hospedar alguns dos maiores e mais acessados sites na internet. Ele…

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Common Problems 118082

Ubuntu 18.04 LTS UFW rules block application despite allow entry

🟡 Medium   ⏱ 5–30 min  Last verified: 11 December 2019 📖 ~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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Arch Linux — openfire — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — openfire — multiple vulnerabilities (3 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-201612-21 Related CVEs: CVE-2015-7707 CVE-2015-6973 CVE-2015-6972 Upstream summary: Type: multiple issues. Status: Fixed. Affected: 4.0.4-1. Fixed in: 4.1.0-1. Group: AVG-15. Table of contents Symptom & Impact Environment & Reproduction Root […]

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How to Configure NTP Time Synchronization on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure NTP Time Synchronization on Debian 9

Introduction This guide explains how to Configure NTP Time Synchronization on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with the […]

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Использование SSH для подключения к удаленному серверу — step-by-step Linux tutorial on Progressive Robot

Использование SSH для подключения к удаленному серверу

SSH — это важный инструмент, используемый для администрирования удаленных серверов Linux. В этом руководстве мы опишем основы использования этого инструмента и способы настройки вашего окружения SSH.

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