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IBM AIX 7.2 — CVE-2021-29723 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2021-29723 — vulnerability — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 25 May 2026 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2021-29723, IBM Support Bulletin CVE: CVE-2021-29723 NVD summary: IBM Sterling Secure Proxy 6.0.1, 6.0.2, 2.4.3.2, and 3.4.3.2 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive […]

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How To Manage Puppet 4 Certificates — step-by-step DevOps tutorial on Progressive Robot

How To Manage Puppet 4 Certificates

Puppet is a configuration management tool that helps system administrators automate the provisioning, configuration and management of a server infrastructure. Communication between the master and agents is granted and secured with client-verified HTTPS, which requires valid identifying SSL certificates.

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How to Install Certbot and Automate Let's Encrypt Renewals on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Certbot and Automate Let’s Encrypt Renewals on RHEL 9

Let’s Encrypt provides free, automated TLS certificates that are trusted by all major browsers. Certbot is the official ACME client that handles certificate issuance and renewal against the Let’s Encrypt CA. On RHEL 9, Certbot is available through the EPEL repository, making integration with Nginx and Apache straightforward. This tutorial walks through installing Certbot, obtaining […]

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AlmaLinux 8 — po4a — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — po4a — 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-2021:4520 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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Oracle Linux 8 — container-tools:ol8 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — container-tools:ol8 — security and stability fixes — required update (ELSA-2020-1379)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1379 Related CVEs: CVE-2020-8608 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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How to Install CodeIgniter on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install CodeIgniter on CentOS Stream 9

Introduction This tutorial demonstrates how to Install CodeIgniter on CentOS Stream 9 on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the default AppStream […]

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AlmaLinux 8 — gcc-toolset-11-dyninst — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — gcc-toolset-11-dyninst — 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-2021:4259 Upstream summary: GCC Toolset is a compiler toolset that provides recent versions of development tools. GCC Toolset is an Application Stream packaged as a Software Collection. This enhancement update adds the […]

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Common Problems 118921

Ubuntu 14.04 LTS apt/dpkg lock prevents updates

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: 14.04 LTS 📖 ~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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AlmaLinux 8 — redhat-rpm-config — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — redhat-rpm-config — 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-2022:1882 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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