Operations

How to Configure Swap Space on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Swap Space on Debian 9

Introduction How to Configure Swap Space on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 9. This […]

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How to Enable AppArmor on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Enable AppArmor on Debian 9

Introduction Deploying enable apparmor on debian 9 on a Debian 9 Stretch 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 Before you begin, ensure […]

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

How to Install and Configure iptables on Debian 9

Introduction Deploying install and configure iptables on debian 9 on a Debian 9 Stretch 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 Debian […]

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How to Configure NTP Time Synchronization on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure NTP Time Synchronization on Debian 9

Introduction This guide explains how to Configure NTP Time Synchronization on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with the […]

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How to Set Up Automatic Security Updates on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Automatic Security Updates on Debian 9

Introduction Deploying set up automatic security updates on debian 9 on a Debian 9 Stretch 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 […]

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How to Configure the System Timezone on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure the System Timezone on Debian 9

Introduction Deploying configure the system timezone on debian 9 on a Debian 9 Stretch 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 […]

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How to Monitor Nginx with Prometheus nginx-exporter on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Monitor Nginx with Prometheus nginx-exporter on RHEL 7

How to Monitor Nginx with Prometheus nginx-exporter on RHEL 7 Monitoring your Nginx web server with Prometheus and Grafana gives you real-time visibility into request rates, connection states, error rates, and server performance over time. The Prometheus ecosystem works through a scrape model: an exporter process exposes metrics at an HTTP endpoint in a text […]

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How to Set the Hostname and FQDN on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set the Hostname and FQDN on Debian 9

Introduction Deploying set the hostname and fqdn on debian 9 on a Debian 9 Stretch 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 […]

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How to Configure sudo for Non-Root Users on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure sudo for Non-Root Users on Debian 9

Introduction How to Configure sudo for Non-Root Users on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 […]

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How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 A default Nginx installation exposes unnecessary information about the server software, accepts outdated and broken TLS protocol versions, and omits the HTTP security headers that modern browsers rely on for protection against cross-site scripting, clickjacking, and protocol downgrade attacks. Hardening Nginx […]

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