Debian 9

Common Problems 121523

Debian 9: DNS resolution breaks after resolv.conf overwrite

🟠 High   ⏱ 5–30 min  Last verified: 2 April 2021 Affected versions: Debian 9 📖 ~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 & […]

Read more
Debian 9 — network-manager-ssh — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — network-manager-ssh — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 March 2021 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-9355 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
Debian 9 — libpam-krb5 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — libpam-krb5 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 March 2021 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-10595 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
How to Set Up Snapshots with LVM on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Snapshots with LVM on Debian 9

Introduction Deploying set up snapshots with lvm on debian 9 on a Debian 9 Stretch 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 You […]

Read more
Como Instalar o Servidor Web Apache no Debian 9 — step-by-step Linux tutorial on Progressive Robot

Como Instalar o Servidor Web Apache no Debian 9

O servidor HTTP Apache é o servidor Web mais amplamente usado no mundo. Ele fornece muitas características poderosas, incluindo módulos carregáveis dinamicamente, suporte robusto de mídia e uma integração extensa com outros softwares populares. Neste guia, vamos explicar como…

Read more
How to Install Ruby on Rails on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Ruby on Rails on Debian 9

Introduction How to Install Ruby on Rails on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. […]

Read more
Common Problems 121604

Debian 9 – time synchronization fails causing TLS and auth errors

🟠 High   ⏱ 5–30 min  Last verified: 27 March 2021 Affected versions: Debian 9 📖 ~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 & […]

Read more
How to Install Prometheus on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Prometheus on Debian 9

Introduction This guide explains how to Install Prometheus 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 standard repositories […]

Read more
Debian 9 — proftpd-dfsg — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — proftpd-dfsg — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 19 March 2021 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-12815 CVE-2019-18217 CVE-2020-9273 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

Read more
How to Configure rsyslog on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure rsyslog on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure rsyslog on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully and the resulting […]

Read more
CHAT