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How to Configure Server Blocks in Nginx on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Server Blocks in Nginx on RHEL 10

Introduction How to Configure Server Blocks in Nginx on RHEL 10 on RHEL 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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Ubuntu 22.04 — pam — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — pam — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 12 March 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7580-1 Related CVEs: CVE-2025-6020 CVE-2024-22365 CVE-2022-28321 https://launchpad.net/bugs/2006073 Upstream summary: Olivier BAL-PETRE discovered that the PAM pam_namespace module incorrectly handled user-controlled paths. In environments where pam_namespace is used, a local attacker […]

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How to Install Podman on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Podman on Oracle Linux 10

Introduction How to Install Podman on Oracle Linux 10 on Oracle Linux 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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How to Configure Btrfs Subvolumes on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Btrfs Subvolumes on RHEL 10

Introduction This tutorial demonstrates how to Configure Btrfs Subvolumes on RHEL 10 on RHEL 10. 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 RHEL 10 system with the default AppStream repositories enabled. […]

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Ubuntu 18.04 — pam-pkcs11 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — pam-pkcs11 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 March 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7363-1 Related CVEs: CVE-2025-24032 CVE-2025-24531 Upstream summary: Marcus Rückert and Matthias Gerstner discovered that PAM-PKCS#11 did not properly handle certain return codes when authentication was not possible. An attacker could […]

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How to Configure Dovecot IMAP Server on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Dovecot IMAP Server on RHEL 10

Introduction How to Configure Dovecot IMAP Server on RHEL 10 on RHEL 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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Oracle Linux 10 — mod_auth_openidc — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — mod_auth_openidc — vulnerability — patch and remediation guide (ELSA-2025-7490)

🟠 High   ⏱ 15–60 min  Last verified: 9 March 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-7490 Related CVEs: CVE-2025-31492 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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Debian 11 — opam — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — opam — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 March 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2026-41082 Upstream summary: In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory. Table of contents Symptom & […]

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Ubuntu 14.04 — krb5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — krb5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 March 2026 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7542-1 Related CVEs: CVE-2025-3576 CVE-2024-3596 CVE-2024-37370 CVE-2024-37371 CVE-2023-36054 CVE-2018-20217 CVE-2022-42898 CVE-2020-28196  +12 more Upstream summary: It was discovered that Kerberos allowed the usage of weak cryptographic standards. An attacker could […]

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How to Join RHEL 10 to Active Directory with realmd — step-by-step RHEL 10 tutorial on Progressive Robot

How to Join RHEL 10 to Active Directory with realmd

Introduction Setting up join rhel 10 to active directory with realmd on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Join RHEL 10 to Active Directory with realmd, with all the commands you need, the SELinux and firewalld considerations to keep […]

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