Linux

How to Perform a System Security Audit with auditd on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Perform a System Security Audit with auditd on RHEL 9

Security auditing is the practice of recording and reviewing system calls, file accesses, user actions, and configuration changes to detect policy violations, investigate incidents, and demonstrate compliance with standards like PCI DSS, HIPAA, and SOC 2. On RHEL 9, the Linux Audit Framework — provided by the auditd daemon — captures events at the kernel […]

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Debian 13 — dvipng — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — dvipng — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-0829 Upstream summary: Multiple array index errors in set.c in dvipng 1.11 and 1.12, and teTeX, allow remote attackers to cause a denial of service (application crash) or […]

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Alpine Linux 3.20 — libass — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — libass — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 0.13.4-r0 📖 ~4 min read  •  Source: Alpine secdb entry — libass 0.13.4-r0 Related CVEs: CVE-2016-7969 CVE-2016-7970 CVE-2016-7971 CVE-2016-7972 Upstream summary: Alpine community repository for vv3.20 ships libass 0.13.4-r0 which addresses CVE-2016-7969. Table of contents Symptom […]

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Debian 13 — node-log4js — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — node-log4js — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-21704 Upstream summary: log4js-node is a port of log4js to node.js. In affected versions default file permissions for log files created by the file, fileSync and dateFile appenders are […]

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How to Install and Configure vim and nano on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Configure vim and nano on RHEL 9

Every Linux administrator needs at least one terminal text editor in their toolkit. When a remote server is accessible only via SSH with no GUI, when a configuration file needs editing before a service can start, or when you are recovering a broken system from a rescue shell, your text editor is your primary interface. […]

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Debian 13 — hamlib — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — hamlib — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3736 Upstream summary: ltdl.c in libltdl in GNU Libtool 1.5.x, and 2.2.6 before 2.2.6b, as used in Ham Radio Control Libraries, Q, and possibly other products, attempts to […]

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Debian 13 — e2guardian — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — e2guardian — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-44273 Upstream summary: e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a […]

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How to Install CouchDB on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install CouchDB on RHEL 10

Introduction How to Install CouchDB on RHEL 10 on RHEL 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible and production-safe. […]

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openSUSE Leap 15.6 — python311-python-sql — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — python311-python-sql — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2024:0412-1 (see also SUSE bugzilla) Related CVEs: CVE-2024-9774 Upstream summary: A vulnerability was found in python-sql where unary operators do not escape non-Expression. Table of contents Symptom & Impact Environment & […]

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How to Use journalctl for Systemd Log Analysis on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Use journalctl for Systemd Log Analysis on RHEL 9

The Linux kernel’s systemd journal is a structured binary log that stores the output of every service, kernel message, boot sequence, and user session. Unlike traditional text-based syslog, the journal stores metadata alongside each log entry — the unit name, PID, UID, executable path, systemd unit state, and priority level — enabling far more precise […]

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