September 2019 - Page 25 of 66

How to Configure Huge Pages for Database Performance on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Huge Pages for Database Performance on RHEL 9

Standard Linux memory pages are 4 KB, and the kernel must maintain a Translation Lookaside Buffer (TLB) entry for each mapped page. Database systems that manage large shared memory segments — such as PostgreSQL’s shared_buffers, Oracle’s SGA, or MySQL’s InnoDB buffer pool — can create millions of TLB entries, causing frequent TLB misses that significantly […]

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

openSUSE Tumbleweed — unshield — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2015-1386 Upstream summary: Directory traversal vulnerability in unshield 1.0-1. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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Common Problems 117997

Ubuntu 18.04 ext4 Filesystem Mounts Read-Only After I/O Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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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Arch Linux — libdwarf — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libdwarf — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201612-4 Related CVEs: CVE-2016-9558 CVE-2016-9480 CVE-2016-9276 CVE-2016-9275 CVE-2016-8681 CVE-2016-8680 CVE-2016-8679 CVE-2016-7511  +12 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 20161021-1. Fixed in: 20161124-1. Group: AVG-89. Table of contents […]

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Common Problems 117933

Ubuntu 18.04 LTS system runs out of disk space in /var

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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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Arch Linux — mediawiki — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — mediawiki — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201711-20 Related CVEs: CVE-2017-8815 CVE-2017-8814 CVE-2017-8812 CVE-2017-8811 CVE-2017-8810 CVE-2017-8809 CVE-2017-8808 CVE-2017-0361  +12 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 1.29.1-1. Fixed in: 1.29.2-1. Group: AVG-490. Table of contents […]

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How to Set Up FTP Server with vsftpd on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up FTP Server with vsftpd on FreeBSD 12

Introduction How to Set Up FTP Server with vsftpd on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf […]

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Common Problems 113487

Windows Server 2012 R2 — MSIX package install blocked by AppLocker or GPO publisher policy — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 04 June 2027 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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FreeBSD 12 — ap24-mod_jk — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — ap24-mod_jk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mod_jk — information disclosure Related CVEs: CVE-2014-8111 Upstream summary: NIST reports: Apache Tomcat Connectors (mod_jk) before 1.2.41 ignores JkUnmount rules for subtrees of previous JkMount rules, which allows remote attackers […]

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