Linux

How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 8

SSL/TLS certificates are the foundation of encrypted communications on the internet, authenticating servers and encrypting data in transit. On RHEL 8, OpenSSL provides a full-featured toolkit for creating your own Certificate Authority, generating server certificates, and managing the entire certificate lifecycle. Understanding this process is essential for securing internal services without relying on external providers. […]

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Oracle Linux 8 — Messages Referring to tmpfiles.d Files Appear During Upgrade — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Messages Referring to tmpfiles.d Files Appear During Upgrade

🟠 High   ⏱ 5–30 min  Last verified: 2 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: Oracle Bug 32852433 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 […]

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AlmaLinux 8 — spacewalk-koan — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — spacewalk-koan — 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-2019:3355 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 — cmocka — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — cmocka — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2019:3557 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 — valgrind — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — valgrind — 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-2022:1817 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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How to Install Netdata on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Netdata on RHEL 7

How to Install Netdata on RHEL 7 Netdata is a real-time performance monitoring agent that delivers per-second metrics with zero configuration on most Linux systems. Unlike heavier monitoring solutions that scrape on 15-second or 1-minute intervals, Netdata collects and stores data every second, making it ideal for diagnosing transient performance problems that would be invisible […]

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AlmaLinux 8 — log4j — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — log4j — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2022:1963 Upstream summary: This enhancement update adds the log4j:2 module to AlmaLinux (BZ#1937468) For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table […]

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Alpine Linux edge — polkit — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — polkit — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.120-r2 📖 ~4 min read  •  Source: Alpine secdb entry — polkit 0.120-r2 Related CVEs: CVE-2021-4034 CVE-2021-3560 Upstream summary: Alpine community repository for vedge ships polkit 0.120-r2 which addresses CVE-2021-4034. Table of contents Symptom & Impact […]

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