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How To Use psad to Detect Network Intrusion Attempts on an Ubuntu VPS — step-by-step Linux tutorial on Progressive Robot

How To Use psad to Detect Network Intrusion Attempts on an Ubuntu VPS

A network intrusion detection application can monitor your network interfaces for suspicious traffic and attempted security breaches. In this guide, we will configure a tool called psad to monitor our firewall logs and determine if there is a problem. We will be configuring psad on an Ubuntu 12.04 machine to detect intrusion attempts on our servers.

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Ubuntu 20.04 — ntp — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — ntp — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5175-1 Related CVEs: CVE-2020-15025 CVE-2019-8936 Upstream summary: It was discovered that ntpd incorrectly handled memory when CMAC keys were used. A remote attacker could possibly use this issue to cause […]

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How To Use MongoDB in a Flask Application — step-by-step Databases tutorial on Progressive Robot

How To Use MongoDB in a Flask Application

In web applications, you usually need a database to store and maintain persistent data. Flask is a lightweight Python web framework that provides useful tools and features for creating web applications in the Python Language. MongoDB is a general-purpose, document-oriented, NoSQL database program that uses JSON-like documents to store data. In this tutorial, you’ll build a small todo list web application that demonstrates how to use the PyMongo library, a MongoDB database driver.

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How To Set Up WordPress with W3 Total Cache on Lighttpd Server — step-by-step WordPress tutorial on Progressive Robot

How To Set Up WordPress with W3 Total Cache on Lighttpd Server

This article will show you how to setup WordPress on the Lighttpd web server with the popular caching plugin W3 Total Cache. It is assumed that you already have setup a LLMP stack and have PHP functioning with Lighttpd. We’ll be doing a lot of manual configuration to make minify and page cache work with Lighttpd, as W3 Total Cache doesn’t support this web server out of the box (as it does with Apache and Nginx).

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How to Monitor MySQL with Prometheus on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Monitor MySQL with Prometheus on FreeBSD 12

Introduction This guide explains how to Monitor MySQL with Prometheus on FreeBSD 12 on FreeBSD 12. 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 […]

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How To Set Up a Help Desk System with OTRS on CentOS 7 — step-by-step Linux tutorial on Progressive Robot

How To Set Up a Help Desk System with OTRS on CentOS 7

OTRS is an Open source Ticket Request System. It provides a single point of contact for users, customers, IT personnel, IT services, and any external organizations. The program is written in Perl, supports a variety of databases (MySQL, PostgreSQL, etc), and can integrate with LDAP directories.

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How To Install the Django Web Framework on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install the Django Web Framework on Ubuntu 16.04

Django is a full-featured Python web framework for developing dynamic websites and applications. Using Django, you can quickly create Python web applications and rely on the framework to do a good deal of the heavy lifting. In this guide, we will show you how to get Django…

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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2021-9486)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9486 Related CVEs: CVE-2020-16119 CVE-2017-6074 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Hibernate Tutorial For Beginners — step-by-step DevOps tutorial on Progressive Robot

Hibernate Tutorial For Beginners

Welcome to the Hibernate tutorial for Beginners. Hibernate is one of the most widely used Java ORM tool. Most of the applications use relational databases to store application information and at the low level we use [JDBC API](/community/tutorials/jdbc-tutorial "JDBC Tutorial with Example Projects, DataSource, JNDI and Spring Integration") for connecting to databases and perform CRUD […]

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