Firewall

How to Use alt_disk_install for Upgrades on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use alt_disk_install for Upgrades 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 use alt_disk_install for upgrades on ibm aix 7.1 on […]

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How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Harden SSH on Ubuntu 24.04

SSH is the primary remote access method for Linux servers and is a common target for brute-force attacks. This guide walks through SSH hardening best practices on Ubuntu 24.04 LTS to significantly reduce your attack surface. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server SSH key-based authentication already configured A user […]

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How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up WireGuard VPN on Ubuntu 24.04

WireGuard is a modern, fast, and secure VPN protocol built into the Linux kernel. It is simpler to configure than OpenVPN and IPsec while offering superior performance. This guide sets up a WireGuard VPN server on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server with a public IP […]

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How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Configure iptables Firewall Rules on Ubuntu 24.04

iptables is the classic Linux firewall utility that provides fine-grained packet filtering and NAT. While Ubuntu uses UFW as a front-end by default, understanding iptables rules is essential for advanced network control on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Basic understanding […]

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How to Perform an Alternate Disk Migration on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Perform an Alternate Disk Migration 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 perform an alternate disk migration on ibm aix 7.1 […]

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How to Install Vagrant and VirtualBox on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Install Jenkins on Ubuntu 24.04

Jenkins is the leading open-source automation server for CI/CD pipelines. This guide installs the latest LTS Jenkins on Ubuntu 24.04 LTS with Java 21 and configures it behind Nginx. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Minimum 1 GB RAM (2 GB recommended) A user with sudo privileges Step 1 […]

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How to Migrate from AIX 7.1 to AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Migrate from AIX 7.1 to 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 migrate from aix 7.1 to aix 7.1 on IBM […]

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How to Set Up a DNS Server with Bind9 on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up a DNS Server with Bind9 on Ubuntu 26.04

BIND9 (Berkeley Internet Name Domain) is the most widely deployed DNS server software. It handles both authoritative DNS (serving zone records for your domains) and recursive DNS (resolving queries for clients). This guide installs BIND9 on Ubuntu 26.04 LTS as a caching/forwarding resolver. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS A […]

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How to Set Up a DNS Server with Bind9 on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install and Configure Postfix Mail Server on Ubuntu 26.04

Postfix is a high-performance, secure, and widely used Mail Transfer Agent (MTA). It handles the SMTP protocol for sending and relaying email. This guide installs and configures Postfix as an internet-facing SMTP server on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS with a fully qualified domain name (FQDN) […]

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How to Configure RACF Integration on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure RACF Integration 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 racf integration on ibm aix 7.1 on IBM […]

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