May 2021 - Page 17 of 69

Common Problems 114133

RPM database corruption prevents package transactions

🔴 Critical   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Problem Summary Symptoms Diagnostics Root Cause Primary Fix Verification Prevention Rollback Automation Command Reference Escalation Related Notes Problem Summary rpm/dnf transactions fail because rpmdb is inconsistent or locked. Symptoms Messages include […]

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How to Automate Oracle Linux 8 with Ansible — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Automate Oracle Linux 8 with Ansible

Introduction Setting up automate oracle linux 8 with ansible on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Automate Oracle Linux 8 with Ansible, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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FreeBSD 13 — py37-pysaml — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py37-pysaml — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pysaml2 — multiple vulnerabilities Related CVEs: CVE-2021-21238 CVE-2021-21239 Upstream summary: pysaml2 Releases: Fix processing of invalid SAML XML documents – CVE-2021-21238 Fix unspecified xmlsec1 key-type preference – CVE-2021-21239 Table of […]

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Common Problems 112610

Windows Server 2019 PerfMon Shows High Split IO per Sec on Misaligned Virtual Disks – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Windows Server 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 […]

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FreeBSD 13 — openldap-sasl-server — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — openldap-sasl-server — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: openldap — slapd acl selfwrite Security Issue Related CVEs: CVE-2006-4600 Upstream summary: Howard Chu reports: An ACL of the form 'access to dn.subtree="ou=groups, dc=example,dc=com" attr=member by * selfwrite' is intended […]

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Spring Tutorial - Spring Core Framework Tutorials — step-by-step DevOps tutorial on Progressive Robot

Spring Tutorial – Spring Core Framework Tutorials

URL: https://www.progressiverobot.com/spring-tutorial-spring-core-tutorial/ Spring is one of the most widely used Java EE frameworks. I have written a lot on Spring Tutorial and this is a summary post that will work as an index to go through with all of them in order. Spring Tutorial All of the spring tutorials come with example projects that you […]

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

Debian 10 — graphviz — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-18032 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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Ubuntu 16.04 — libapache-session-ldap-perl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libapache-session-ldap-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6596-1 Related CVEs: CVE-2020-36658 Upstream summary: It was discovered that Apache::Session::LDAP incorrectly handled invalid X.509 certificates. If a user or an automated system were tricked into opening a specially crafted […]

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