October 2021 - Page 47 of 69

How to Monitor System Resources with htop, top and vmstat on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Monitor System Resources with htop, top and vmstat on RHEL 8

Understanding what your RHEL 8 server is doing in real time — and historically — is essential for diagnosing performance bottlenecks, identifying runaway processes, and planning capacity. RHEL 8 includes top by default and provides htop, vmstat, iostat, and sar as complementary tools that each excel in different scenarios. This guide walks through installing and […]

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AlmaLinux 8 — subscription-manager-migration-data — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — subscription-manager-migration-data — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2020:1849 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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AlmaLinux 8 — tracker — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — tracker — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2020:4451 Related CVEs: CVE-2019-8625 CVE-2019-8710 CVE-2019-8720 CVE-2019-8743 CVE-2019-8764 CVE-2019-8766 CVE-2019-8769 CVE-2019-8771  +12 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]

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Oracle Linux 8 — patch — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — patch — security and stability fixes — required update (ELSA-2020-1852)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1852 Related CVEs: CVE-2019-13636 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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openSUSE Tumbleweed — postorius — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — postorius — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2021-31997 CVE-2021-40347 Upstream summary: A UNIX Symbolic Link (Symlink) Following vulnerability in python-postorius of openSUSE Leap 15.2, Factory allows local attackers to escalate from users […]

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Common Problems 115464

SELinux File Context Mismatch Breaks Custom App

🟡 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 Install Jaeger for Distributed Tracing on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Jaeger for Distributed Tracing on FreeBSD 13

Introduction Deploying install jaeger for distributed tracing on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the […]

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FreeBSD 13 — py39-sqlalchemy — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py39-sqlalchemy — 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: py39-sqlalchemy12 — multiple SQL Injection vulnerabilities Related CVEs: CVE-2019-7164 CVE-2019-7548 Upstream summary: 21k reports: SQLAlchemy through 1.2.17 and 1.3.x through 1.3.0b2 allows SQL Injection via the order_by parameter. nosecurity reports: […]

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