Tutorials

How to Configure PAM on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure PAM on RHEL 7

How to Configure PAM on RHEL 7 Pluggable Authentication Modules (PAM) is the authentication framework that underlies almost every login mechanism on Red Hat Enterprise Linux 7. When a user runs su, logs in over SSH, unlocks a screensaver, or authenticates to any PAM-aware application, the PAM stack determines whether that authentication succeeds, what restrictions […]

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How to Configure Docker with a Non-Root User on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure Docker with a Non-Root User on FreeBSD 15

Introduction FreeBSD 15 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up configure docker with a non-root user on FreeBSD 15 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 distribution. […]

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How to Install and Configure AIDE on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install and Configure AIDE on RHEL 7

How to Install and Configure AIDE on RHEL 7 AIDE (Advanced Intrusion Detection Environment) is a host-based intrusion detection system (HIDS) that works by taking a cryptographic snapshot of your filesystem at a known-good point in time and then comparing the current state of the filesystem against that baseline to identify any files that have […]

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How to Install Docker Engine on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install Docker Engine on FreeBSD 15

Introduction How to Install Docker Engine on FreeBSD 15 is a core administration task for any FreeBSD 15 server operator. FreeBSD 15 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 filtering, […]

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How to Install Lua on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install Lua on FreeBSD 15

Introduction Deploying install lua on a FreeBSD 15 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 + ports approach so […]

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How to Set Up Automatic SSH Login Banners on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up Automatic SSH Login Banners on RHEL 7

How to Set Up Automatic SSH Login Banners on RHEL 7 Displaying a clear, legally appropriate banner when users connect to a Linux server over SSH is both a security best practice and a compliance requirement in many regulated environments such as PCI-DSS, HIPAA, and government frameworks. On Red Hat Enterprise Linux 7, there are […]

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How to Install GraalVM on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install GraalVM on FreeBSD 15

Introduction How to Install GraalVM on FreeBSD 15 is a core administration task for any FreeBSD 15 server operator. FreeBSD 15 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 filtering, and […]

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How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 7

How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 7 OpenSSL is the standard open-source toolkit for implementing the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, and it is used on almost every Linux server in production. On Red Hat Enterprise Linux 7, OpenSSL is installed by default […]

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How to Install Scala and sbt on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install Scala and sbt on FreeBSD 15

Introduction How to Install Scala and sbt on FreeBSD 15 is a core administration task for any FreeBSD 15 server operator. FreeBSD 15 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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How to Install Kotlin on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install Kotlin on FreeBSD 15

Introduction This guide explains how to Install Kotlin on FreeBSD 15 on FreeBSD 15. 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 separation. […]

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