Operations

Common Problems 118031

Ubuntu 18.04 Audio Output Missing After Restart

🟡 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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How to Configure Virtual Hosts in Apache on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Virtual Hosts in Apache on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure virtual hosts in apache both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Virtual Hosts in Apache on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Common Problems 117908

Ubuntu 18.04 LTS – unattended-upgrades causes sustained CPU usage – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 18.04 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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Arch Linux — bchunk — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — bchunk — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201803-24 Related CVEs: CVE-2017-15955 CVE-2017-15954 CVE-2017-15953 Upstream summary: Type: denial of service. Status: Fixed. Affected: 1.2.0-4. Fixed in: 1.2.2-4. Group: AVG-475. Table of contents Symptom & Impact Environment & Reproduction […]

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

FreeBSD 12 — mupdf — multiple vulnerabilities (2 CVEs) — 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: mupdf — multiple vulnerabilities Related CVEs: CVE-2016-6265 CVE-2016-6525 Upstream summary: Tobias Kortkamp reports: Heap-based buffer overflow in the pdf_load_mesh_params function in pdf/pdf-shade.c in MuPDF allows remote attackers to cause a […]

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How to Configure an SMTP Server on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure an SMTP Server on Windows Server 2016

How to Configure Windows Server 2016 SMTP Server An SMTP (Simple Mail Transfer Protocol) server on Windows Server 2016 allows the server to send outbound email messages — for example, for application alerts, scheduled task notifications, or as a relay for internal applications. Windows Server 2016 includes an SMTP Server feature that can be configured […]

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FreeBSD 12 — popfile — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — popfile — security advisory — 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: popfile file disclosure Upstream summary: John Graham-Cumming reports that certain configurations of POPFile may allow the retrieval of any files with the extensions .gif, .png, .ico, .css, as well as […]

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Ubuntu 18.04 — ec2-hibinit-agent — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ec2-hibinit-agent — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6519-1 Related CVEs: https://launchpad.net/bugs/1941785 Upstream summary: The EC2 hibagent package has been updated to add IMDSv2 support, as IMDSv1 uses an insecure protocol and is no longer recommended. Table of […]

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How to Set Up Tripwire for File Integrity Monitoring on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up Tripwire for File Integrity Monitoring on RHEL 9

File Integrity Monitoring (FIM) detects unauthorised modifications to critical system files — a key indicator of compromise that antivirus and network monitoring tools often miss. Tripwire is a battle-tested open-source FIM tool that creates a cryptographic hash database of your filesystem and alerts you when files are added, modified, or deleted. On RHEL 9, Tripwire […]

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FreeBSD 12 — squid — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — squid — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: squid — Multiple vulnerabilities Related CVEs: CVE-1999-0710 CVE-2004-0189 CVE-2004-0541 CVE-2004-0832 CVE-2004-0918 CVE-2005-0094 CVE-2005-0095 CVE-2005-0096  +12 more Upstream summary: The squid-cache project reports: Denial of Service in FTP Request/Response smuggling in […]

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