Troubleshooting

How to Configure Chrony as a Time Server on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Chrony as a Time Server on RHEL 7

How to Configure Chrony as a Time Server on RHEL 7 Accurate system time is foundational to almost every enterprise workload. Kerberos authentication, TLS certificate validation, log correlation, and database replication all depend on clocks that stay in sync. While ntpd has served Linux administrators for decades, Red Hat Enterprise Linux 7 ships Chrony as […]

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Common Problems 118601

Ubuntu 16.04 Locale Warnings During Package Installation

🟡 Medium   ⏱ 5–30 min  Last verified: 4 November 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 118112

Ubuntu 18.04 LTS LVM volume extension not reflected in filesystem

🟡 Medium   ⏱ 5–30 min  Last verified: 4 November 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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FreeBSD 12 — php55-pgsql — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — php55-pgsql — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: php5 — multiple vulnerabilities Related CVEs: CVE-2015-4643 CVE-2015-4644 Upstream summary: The PHP project reports: DOM and GD: Fixed bug #69719 (Incorrect handling of paths with NULs). FTP: Improved fix for […]

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Common Problems 114941

RHEL 8 Kernel Updated but GRUB Boots Older Kernel by Default

🟡 Medium   ⏱ 5–30 min  Last verified: 4 November 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 113115

Windows Server 2016 – Password policy change blocked by domain functional level – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 4 November 2019 Affected versions: Windows Server 2016 📖 ~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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How to Set Up Windows Server Backup on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up Windows Server Backup on Windows Server 2012 R2

How to Set Up Windows Server Backup on Windows Server 2012 R2 Windows Server Backup (WSB) is the built-in backup solution included with Windows Server 2012 R2. It provides a straightforward mechanism for protecting your server data through full server backups, system state backups, and individual volume or folder backups. While not as feature-rich as […]

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

SLES 15 — sysconfig — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 4 November 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2012:0096-1 (see also SUSE bugzilla) Related CVEs: CVE-2011-4182 Upstream summary: Missing escaping of ESSID values in sysconfig of SUSE Linux Enterprise allows attackers controlling an access point to cause execute arbitrary code. […]

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Oracle Linux 8 — python-psutil — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — python-psutil — vulnerability — patch and remediation guide (ELSA-2021-4324)

🟡 Medium   ⏱ 10–30 min  Last verified: 4 November 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4324 Related CVEs: CVE-2019-18874 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Debian 10 — mosquitto — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — mosquitto — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 November 2019 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-11779 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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