Kernel Drivers

How to Install and Configure Tomcat 9 on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Configure Tomcat 9 on Debian 10

Introduction This guide explains how to Install and Configure Tomcat 9 on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with […]

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Common Problems 121162

Debian 10 – Docker or containerd fails after cgroup v2 migration

🟠 High   ⏱ 5–30 min  Last verified: 4 April 2020 Affected versions: Debian 10 📖 ~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 Install containerd as a Container Runtime on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install containerd as a Container Runtime on RHEL 7

How to Install containerd as a Container Runtime on RHEL 7 containerd is a high-performance, industry-standard container runtime that serves as the foundation beneath both Docker and Kubernetes. When Kubernetes deprecated the Dockershim in version 1.20 and removed it in version 1.24, containerd became the most widely adopted direct container runtime for Kubernetes clusters. Installing […]

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How to Install Portainer on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Portainer on Debian 10

Introduction This guide explains how to Install Portainer on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard repositories […]

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How to Configure OpenLDAP Server on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure OpenLDAP Server on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure openldap server on ibm aix 7.1 on IBM […]

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How to Set Up MariaDB Galera Cluster on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up MariaDB Galera Cluster on Debian 10

Introduction Deploying set up mariadb galera cluster on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure […]

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How to Configure Nginx with PageSpeed Module on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Configure Nginx with PageSpeed Module on SLES 15

Introduction This tutorial covers How to Configure Nginx with PageSpeed Module on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to date: […]

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How to Configure the System Timezone on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure the System Timezone on Debian 10

Introduction How to Configure the System Timezone on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster 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 10. […]

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How to Implement Just-In-Time (JIT) Administration on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Implement Just-In-Time (JIT) Administration on Windows Server 2019

Introduction to Just-In-Time Administration Just-In-Time (JIT) Administration is a privileged access management practice where elevated permissions are granted only for the duration required to complete a specific task—typically minutes or hours—after which they are automatically revoked. This eliminates standing privileges: administrators no longer have persistent Domain Admin or local admin rights that an attacker can […]

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Common Problems 121125

Debian 10 GRUB Update Fails After Package Changes

🟠 High   ⏱ 5–30 min  Last verified: 31 March 2020 Affected versions: Debian 10 📖 ~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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