Linux

Common Problems 117517

Ubuntu 20.04 LTS – LVM volume reaches 100 percent causing service failures – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 4 May 2020 Affected versions: Ubuntu 20.04 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 Upgrade to PHP 7 on CentOS 7 — step-by-step Linux tutorial on Progressive Robot

How To Upgrade to PHP 7 on CentOS 7

PHP 7.0 was released on December 3, 2015. It promises substantial speed improvements over previous versions of the language, along with new features like scalar type hinting. This guide explains how to quickly upgrade a PHP 5.x installation on a CentOS 7 system with Apache or Nginx, using community-provided packages.

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openSUSE Tumbleweed — gstreamer — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — gstreamer — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2015:0921-1 (see also SUSE bugzilla) Related CVEs: CVE-2015-0797 Upstream summary: GStreamer before 1.4.5, as used in Mozilla Firefox before 38.0, Firefox ESR 31.x before 31.7, and Thunderbird before 31.7 on Linux, allows […]

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How to Configure a Python Gunicorn Application Server on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure a Python Gunicorn Application Server on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up configure a python gunicorn application server on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step […]

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Ubuntu 20.04 — libvncserver — multiple vulnerabilities (18 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libvncserver — multiple vulnerabilities (18 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 May 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4636-1 Related CVEs: CVE-2020-25708 CVE-2019-20839 CVE-2019-20840 CVE-2020-14396 CVE-2020-14397 CVE-2020-14398 CVE-2020-14399 CVE-2020-14400  +10 more Upstream summary: It was discovered that LibVNCServer incorrectly handled certain internals. An attacker could possibly use this […]

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Arch Linux — subversion — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — subversion — multiple vulnerabilities (4 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-201708-14 Related CVEs: CVE-2017-9800 CVE-2019-0203 CVE-2018-11782 CVE-2018-11803 Upstream summary: Type: arbitrary command execution. Status: Fixed. Affected: 1.9.6-1. Fixed in: 1.9.7-1. Group: AVG-379. Table of contents Symptom & Impact Environment & […]

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How to Install, Run, and Connect to Jupyter Notebook on a Remote Server — step-by-step Linux tutorial on Progressive Robot

How to Install, Run, and Connect to Jupyter Notebook on a Remote Server

Jupyter Notebook is an open-source, interactive web application that allows you to write and run computer code in more than 40 programming languages, including Python, R, Julia, and Scala. This article will walk you through how to install and configure the Jupyter Notebook application on a web server and how to connect to it from your local computer.

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Debian 9 — libgd2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — libgd2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 4 May 2020 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-6362 CVE-2017-7890 CVE-2019-6977 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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Arch Linux — dnsmasq — multiple vulnerabilities (14 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — dnsmasq — multiple vulnerabilities (14 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-201710-1 Related CVEs: CVE-2017-14496 CVE-2017-14495 CVE-2017-14494 CVE-2017-14493 CVE-2017-14492 CVE-2017-14491 CVE-2020-25687 CVE-2020-25686  +6 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 2.77-1. Fixed in: 2.78-1. Group: AVG-421. Table of contents […]

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