Systemd Services

How to Set a Hostname and FQDN on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set a Hostname and FQDN on RHEL 7

How to Set a Hostname and FQDN on RHEL 7 A properly configured hostname is one of the most fundamental aspects of Linux system administration. On Red Hat Enterprise Linux 7, the hostname identifies your machine on the network and appears in log files, shell prompts, and monitoring tools. Getting it right — including the […]

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

How to Install Terraform on Debian 10

Introduction Deploying install terraform 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 You will need a […]

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How to Configure Fail2Ban to Protect SSH on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Fail2Ban to Protect SSH on RHEL 7

How to Configure Fail2Ban to Protect SSH on RHEL 7 Even with SSH key-based authentication enabled, your server’s port 22 (or whatever port SSH is listening on) is constantly targeted by automated bots scanning the internet for open SSH services. These bots attempt thousands of login combinations per hour. While they cannot succeed against key-only […]

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How to Write Ansible Playbooks for Debian 10 Systems — step-by-step Debian 10 tutorial on Progressive Robot

How to Write Ansible Playbooks for Debian 10 Systems

Introduction This guide explains how to Write Ansible Playbooks for Debian 10 Systems 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 […]

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How to Set Up SSH Key-Based Authentication on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up SSH Key-Based Authentication on RHEL 7

How to Set Up SSH Key-Based Authentication on RHEL 7 SSH key-based authentication replaces password logins with a cryptographic key pair: a private key that stays on your local machine and a public key that you install on the remote server. When you connect, the server challenges your SSH client to prove it holds the […]

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How to Set Up Ansible on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Ansible on Debian 10

Introduction This guide explains how to Set Up Ansible 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 […]

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

How to Install GitLab Runner on Debian 10

Introduction This guide explains how to Install GitLab Runner 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 […]

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How to Configure Jenkins Pipelines on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Jenkins Pipelines on Debian 10

Introduction How to Configure Jenkins Pipelines 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. This […]

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

How to Install Jenkins on Debian 10

Introduction How to Install Jenkins 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. This tutorial […]

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Initial Server Setup with RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

Initial Server Setup with RHEL 7

Initial Server Setup with RHEL 7 Setting up a fresh Red Hat Enterprise Linux 7 server correctly from the start is one of the most important steps you can take to ensure long-term security and stability. Whether you have just provisioned a bare-metal machine or a cloud instance, this guide walks you through every essential […]

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