Logging Monitoring

Common Problems 118470

Ubuntu 16.04 disk space fills up unexpectedly

🟡 Medium   ⏱ 5–30 min  Last verified: 9 December 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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Common Problems 113411

Windows Server 2012 R2 — Password change rejected with policy mismatch even though it meets stated requirements — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 December 2019 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

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How to Configure iptables Packet Filtering on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure iptables Packet Filtering on Debian 9

Introduction This guide explains how to Configure iptables Packet Filtering 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 […]

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FreeBSD 12 — pure-ftpd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — pure-ftpd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 December 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pureftpd — multiple vulnerabilities Related CVEs: CVE-2011-0418 CVE-2011-1575 Upstream summary: Pure-FTPd development team reports: Support for braces expansion in directory listings has been disabled — Cf. CVE-2011-0418. Fix a STARTTLS […]

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FreeBSD 12 — miniupnpc — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — miniupnpc — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 December 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: miniupnpc — integer signedness error Related CVEs: CVE-2015-6031 CVE-2017-8798 Upstream summary: Tintinweb reports: An integer signedness error was found in miniupnp's miniwget allowing an unauthenticated remote entity typically located on […]

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How to Automate Backups with rsync and cron on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Automate Backups with rsync and cron on RHEL 7

How to Automate Backups with rsync and cron on RHEL 7 Reliable backups are the foundation of any serious system administration strategy. On RHEL 7, rsync combined with cron provides a powerful, scriptable, and highly efficient backup solution that requires no commercial software or complex infrastructure. rsync transfers only changed file blocks over the network, […]

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Initial Server Setup with RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

Initial Server Setup with RHEL 7

Initial Server Setup with RHEL 7 Setting up a fresh Red Hat Enterprise Linux 7 server correctly from the start is one of the most important steps you can take to ensure long-term security and stability. Whether you have just provisioned a bare-metal machine or a cloud instance, this guide walks you through every essential […]

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openSUSE Tumbleweed — ruby2.2-rubygem-jquery-rails — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — ruby2.2-rubygem-jquery-rails — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2025:15117-1 (see also SUSE bugzilla) Related CVEs: CVE-2015-1840 Upstream summary: jquery_ujs.js in jquery-rails before 3.1.3 and 4.x before 4.0.4 and rails.js in jquery-ujs before 1.0.4, as used with Ruby on Rails 3.x […]

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SLES 15 — libct4 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libct4 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 9 December 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:1417-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-13508 Upstream summary: FreeTDS through 1.1.11 has a Buffer Overflow. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]

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