Backup Recovery

How to Configure GEOM Mirroring on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure GEOM Mirroring on FreeBSD 13

Introduction This guide explains how to Configure GEOM Mirroring on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained privilege […]

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How to Configure AIDE File Integrity Monitoring on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure AIDE File Integrity Monitoring on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure aide file integrity monitoring on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure AIDE File Integrity Monitoring on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the […]

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How to Configure Apache Virtual Hosts on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Apache Virtual Hosts on FreeBSD 13

Introduction How to Configure Apache Virtual Hosts on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet […]

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Common Problems 121689

Debian 9 Firewall Rules Block Required Service Ports

🟠 High   ⏱ 5–30 min  Last verified: 7 January 2022 Affected versions: Debian 9 📖 ~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 Configure PostgreSQL High Availability with Patroni on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure PostgreSQL High Availability with Patroni on CentOS Stream 9

Introduction Setting up configure postgresql high availability with patroni on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure PostgreSQL High Availability with Patroni on CentOS Stream 9, with all the commands you need, the SELinux […]

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How to Install Python 3.11 on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Python 3.11 on FreeBSD 13

Introduction Deploying install python 3.11 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 standard base […]

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How to Install Jenkins on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install Jenkins on CentOS Stream 9

Introduction This tutorial demonstrates how to Install Jenkins 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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How to Configure pfsync Firewall State Synchronization on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure pfsync Firewall State Synchronization on FreeBSD 13

Introduction This guide explains how to Configure pfsync Firewall State Synchronization on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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How to Set Up a Certificate Authority on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up a Certificate Authority on CentOS Stream 9

Introduction Setting up set up a certificate authority on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up a Certificate Authority on CentOS Stream 9, with all the commands you need, the SELinux and firewalld […]

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Common Problems 114969

RHEL 8 – SELinux AVC Denial Blocks Custom Application Port

🟡 Medium   ⏱ 5–30 min  Last verified: 4 January 2022 📖 ~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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