DNS

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

How to Install and Configure Squid Proxy on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up install and configure squid proxy on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully […]

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How to Install PostgreSQL on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install PostgreSQL on Debian 11

Introduction How to Install PostgreSQL on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 11. This tutorial […]

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How to Set Up NFS High Availability on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up NFS High Availability on CentOS Stream 9

Introduction How to Set Up NFS High Availability on CentOS Stream 9 on CentOS Stream 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting […]

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How to Set Up the Elastic Stack ELK on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up the Elastic Stack ELK on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up set up the elastic stack elk on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step […]

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Debian 11 — djbdns — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — djbdns — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 3 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-4392 CVE-2009-0858 CVE-2012-1191 Upstream summary: dnscache in Daniel J. Bernstein djbdns 1.05 does not prevent simultaneous identical outbound DNS queries, which makes it easier for remote attackers to […]

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How to Install OpenJDK 17 on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install OpenJDK 17 on Debian 11

Introduction This guide explains how to Install OpenJDK 17 on Debian 11 on Debian 11 Bullseye. Debian Bullseye 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 11 install with the standard […]

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How to Configure SSL Client Certificate Authentication on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure SSL Client Certificate Authentication on Debian 11

Introduction How to Configure SSL Client Certificate Authentication on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 Use Python Virtual Environments on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use Python Virtual Environments on RHEL 7

How to Use Python Virtual Environments on RHEL 7 When you install Python packages system-wide with pip3, every project on the server shares the same set of libraries. This creates an immediate problem: Project A requires Flask 1.1 while Project B requires Flask 2.3, and only one version can occupy the global site-packages directory at […]

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