December 2019 - Page 6 of 69

Common Problems 115443

RHEL 7 – Legacy service Command Reports Running but Port Is Closed

🟡 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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Common Problems 114624

Sudo Access Broken By PAM faillock Misconfiguration

🟡 Medium   ⏱ 5–30 min  Last verified: 20 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 Monitor Hyper-V Performance on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Monitor Hyper-V Performance on Windows Server 2012 R2

How to Monitor Hyper-V Performance on Windows Server 2012 R2 Monitoring Hyper-V performance is essential for identifying resource bottlenecks, planning capacity expansions, and ensuring that virtual machines are receiving adequate CPU, memory, storage, and network resources. Windows Server 2012 R2 provides multiple tools for Hyper-V performance monitoring: Performance Monitor with Hyper-V-specific counters, Task Manager, Resource […]

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How to Configure Mandatory Access Control with SELinux Policies on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Mandatory Access Control with SELinux Policies on RHEL 7

How to Configure Mandatory Access Control with SELinux Policies on RHEL 7 SELinux (Security-Enhanced Linux) is a mandatory access control (MAC) framework built into the Linux kernel and deeply integrated into RHEL 7. Unlike discretionary access control (DAC), which is based on user and group ownership, SELinux enforces fine-grained access rules based on security contexts […]

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Spring Bean Scopes — step-by-step DevOps tutorial on Progressive Robot

Spring Bean Scopes

URL: https://www.progressiverobot.com/spring-bean-scopes/ Spring Bean Scopes allows us to have more granular control of the bean instances creation. Sometimes we want to create bean instance as singleton but in some other cases we might want it to be created on every request or once in a session. Spring Bean Scopes There are five types of [spring […]

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FreeBSD 12 — linux-c7-libsamplerate — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — linux-c7-libsamplerate — 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: libsamplerate — multiple vulnerabilities Related CVEs: CVE-2017-7697 Upstream summary: NVD reports: In libsamplerate before 0.1.9, a buffer over-read occurs in the calc_output_single function in src_sinc.c via a crafted audio file. […]

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How to Set Up Software RAID with mdadm on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up Software RAID with mdadm on RHEL 9

Software RAID (Redundant Array of Independent Disks) allows you to combine multiple physical disks into a single logical device that provides redundancy, performance, or both — entirely in software without dedicated hardware. On RHEL 9, mdadm is the standard tool for creating and managing software RAID arrays and is included in the default repositories. Unlike […]

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