Firewall

How to Install Oracle JDK 8 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Oracle JDK 8 on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up install oracle jdk 8 on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully and […]

Read more
How to Profile CPU with tprof on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Profile CPU with tprof 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 profile cpu with tprof on ibm aix 7.2 on […]

Read more
How to Audit Security with Lynis on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Audit Security with Lynis on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up audit security with lynis on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux […]

Read more
Common Problems 119062

Ubuntu 14.04 LTS UFW rule change accidentally blocks SSH

🔴 Critical   ⏱ 5–30 min  Last verified: 2 June 2021 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 & […]

Read more
How to Enable Automatic Security Updates on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Enable Automatic Security Updates on FreeBSD 13

Introduction This guide explains how to Enable Automatic Security Updates 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 […]

Read more
How to Configure NIM Master Server on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure NIM Master Server 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 configure nim master server on ibm aix 7.2 on […]

Read more
How to Configure Kubernetes Persistent Volumes on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Kubernetes Persistent Volumes on FreeBSD 13

Introduction How to Configure Kubernetes Persistent Volumes 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 […]

Read more
How to Configure Shared Memory Segments on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure Shared Memory Segments 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 configure shared memory segments on ibm aix 7.2 on […]

Read more
How to Install pgAdmin 4 on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install pgAdmin 4 on FreeBSD 13

Introduction This guide explains how to Install pgAdmin 4 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 […]

Read more
How to Set Up Windows Server 2019 with Chef — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up Windows Server 2019 with Chef

How to Set Up Windows Server 2019 with Chef Chef is an open-source configuration management platform that automates the provisioning, configuration, and management of infrastructure. Chef uses Ruby-based DSL “recipes” and “cookbooks” to describe how servers should be configured. For Windows Server 2019, Chef provides full support through the Chef Infra Client agent, enabling the […]

Read more
CHAT