Package Management

How to Enable HTTP/2 with Nginx on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Enable HTTP/2 with Nginx on RHEL 8

HTTP/2 delivers significant performance improvements over HTTP/1.1 through features such as header compression, request multiplexing, and server push — all over a single TCP connection. Nginx has supported HTTP/2 since version 1.9.5, and on RHEL 8 the AppStream version of Nginx is compiled with the necessary OpenSSL support to enable it. Because browsers only implement […]

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Common Problems 118453

Ubuntu 16.04 LTS – root filesystem reaches 100% usage unexpectedly – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 July 2019 Affected versions: Ubuntu 16.04 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 […]

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How to Write Ansible Playbooks for Debian 9 Systems — step-by-step Debian 9 tutorial on Progressive Robot

How to Write Ansible Playbooks for Debian 9 Systems

Introduction How to Write Ansible Playbooks for Debian 9 Systems 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. […]

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 3.00-r0 📖 ~4 min read  •  Source: Alpine secdb entry — transmission 3.00-r0 Related CVEs: CVE-2018-10756 Upstream summary: Alpine community repository for vedge ships transmission 3.00-r0 which addresses CVE-2018-10756. Table of contents Symptom & Impact Environment […]

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FreeBSD 12 — zsync — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — zsync — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 July 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: zlib — buffer overflow vulnerability Related CVEs: CVE-2005-2096 Upstream summary: Problem Description An error in the handling of corrupt compressed data streams can result in a buffer being overflowed. Impact […]

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FreeBSD 12 — kibana — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — kibana — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 July 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: kibana4 — XSS vulnerability Related CVEs: CVE-2015-8131 Upstream summary: Elastic reports: Fixes XSS vulnerability (CVE pending) – Thanks to Vladimir Ivanov for responsibly reporting. Table of contents Symptom & Impact […]

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Arch Linux — samba — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — samba — multiple vulnerabilities (19 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201803-10 Related CVEs: CVE-2018-1057 CVE-2018-1050 CVE-2016-2126 CVE-2016-2125 CVE-2016-2123 CVE-2018-16857 CVE-2018-16853 CVE-2018-16852  +11 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 4.7.5-1. Fixed in: 4.7.6-1. Group: AVG-651. Table of contents […]

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Debian 9 — util-linux — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — util-linux — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 July 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-7738 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Ubuntu 18.04 — ntp — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ntp — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 July 2019 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4229-2 Related CVEs: CVE-2018-12327 CVE-2019-8936 CVE-2018-7182 CVE-2018-7183 CVE-2018-7184 CVE-2018-7185 Upstream summary: USN-4229-1 fixed a vulnerability in NTP. This update provides the corresponding update for Ubuntu 18.04 ESM. Original advisory details: […]

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Common Problems 118977

DNS Resolution Fails Due to resolvconf Issues on Ubuntu 14.04

🟡 Medium   ⏱ 5–30 min  Last verified: 8 July 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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