Linux

Arch Linux — libvirt — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libvirt — multiple vulnerabilities (2 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-202101-42 Related CVEs: CVE-2020-25637 CVE-2020-14339 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 1:6.5.0-3. Fixed in: 1:7.0.0-1. Group: AVG-1240. Table of contents Symptom & Impact Environment & Reproduction Root […]

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How to Manage Docker Images and Containers on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Manage Docker Images and Containers on RHEL 7

How to Manage Docker Images and Containers on RHEL 7 Effective day-to-day use of Docker requires a solid command of image and container management. Images are the read-only blueprints from which containers are created; containers are the running (or stopped) instances of those images. Over time, a Docker host accumulates pulled images, stopped containers, dangling […]

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Common Problems 118616

Ubuntu 16.04 LTS locale warnings: Perl locale not supported

🟡 Medium   ⏱ 5–30 min  Last verified: 17 March 2020 📖 ~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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Common Problems 115559

RHEL 7 rsyslog not forwarding logs to remote collector

🟡 Medium   ⏱ 5–30 min  Last verified: 17 March 2020 Affected versions: RHEL 7 📖 ~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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Alpine Linux edge — cairo — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — cairo — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.17.4-r1 📖 ~4 min read  •  Source: Alpine secdb entry — cairo 1.17.4-r1 Related CVEs: CVE-2019-6462 CVE-2020-35492 CVE-2018-19876 Upstream summary: Alpine main repository for vedge ships cairo 1.17.4-r1 which addresses CVE-2019-6462. Table of contents Symptom & […]

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How to Set Up FTP Server with vsftpd on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up FTP Server with vsftpd on Debian 10

Introduction How to Set Up FTP Server with vsftpd on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster 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 […]

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openSUSE Tumbleweed — python36-python3-saml — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-python3-saml — vulnerability — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:0048-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-11427 Upstream summary: OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that […]

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How To Install WordPress with LEMP (Nginx, MariaDB and PHP) on Debian 10 — step-by-step Linux tutorial on Progressive Robot

How To Install WordPress with LEMP (Nginx, MariaDB and PHP) on Debian 10

WordPress is the most popular CMS (content management system) on the internet. It allows you to easily set up flexible blogs and websites on top of a MySQL-based backend with PHP processing. In this guide, we’ll focus on getting a WordPress instance set up on a LEMP stack (Linux, Nginx, MariaDB, and PHP) on a Debian 10 server.

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Ubuntu 18.04 — libpodofo — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libpodofo — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 March 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7217-1 Related CVEs: CVE-2017-5886 CVE-2018-11255 CVE-2018-12983 CVE-2018-20797 CVE-2018-5308 CVE-2018-8002 CVE-2019-10723 CVE-2020-18971  +2 more Upstream summary: It was discovered that the PoDoFo library could dereference a NULL pointer when getting the […]

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