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Common Problems 115615

RHEL 7 NFS Access Denied By firewalld Missing Ports

🟠 High   ⏱ 5–30 min  Last verified: 6 January 2021 Affected versions: RHEL 7 📖 ~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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How to Set Up Datadog Agent on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Datadog Agent on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up datadog agent on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Datadog Agent on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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How to Set Up FreeBSD Jails with iocage on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up FreeBSD Jails with iocage on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up freebsd jails with iocage on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from […]

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Ubuntu 18.04 — libpam-krb5 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libpam-krb5 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 January 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4314-1 Related CVEs: CVE-2020-10595 Upstream summary: Russ Allbery discovered that pam-krb5 incorrectly handled some responses. An attacker could possibly use this issue to execute arbitrary code. Table of contents Symptom […]

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How to Set Up a VPN with SSTP on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up a VPN with SSTP on Windows Server 2012 R2

How to Set Up a VPN with SSTP on Windows Server 2012 R2 Secure Socket Tunneling Protocol (SSTP) is a Microsoft VPN protocol that encapsulates Point-to-Point Protocol (PPP) traffic over an HTTPS connection using SSL/TLS on port 443. SSTP VPNs are highly firewall-friendly because they use the same port as HTTPS web traffic, making them […]

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How to Set Up MySQL with SSL on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up MySQL with SSL on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up mysql with ssl on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up MySQL with SSL on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the […]

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How to Enable the EPEL Repository on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Enable the EPEL Repository on Oracle Linux 8

Introduction How to Enable the EPEL Repository on Oracle Linux 8 on Oracle Linux 8 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 […]

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How to Use iptrace for Network Tracing on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use iptrace for Network Tracing on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use iptrace for network tracing on ibm aix 7.2 […]

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How to Install MariaDB on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install MariaDB on Debian 9 (DEBIAN-9-2)

Introduction How to Install MariaDB on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. This tutorial […]

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How to Configure MySQL InnoDB Cluster on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure MySQL InnoDB Cluster on Oracle Linux 8

Introduction How to Configure MySQL InnoDB Cluster on Oracle Linux 8 on Oracle Linux 8 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 […]

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