Understand free -h

Lets explain these parameters: total: Your total (physical) RAM (excluding a small bit that the kernel permanently reserves for itself at startup); that's why it shows 15 GiB , and not...

What’s the Difference Between a CPU and a GPU?

The CPU (central processing unit) has often been called the brains of the PC. But increasingly, that brain is being enhanced by another part of the PC – the GPU (graphics...

Use Nmap to Scan for Open Ports on Your Servers

Introduction Nmap, short for Network Mapper, is a free, open-source tool for vulnerability scanning and network discovery. Network administrators use Nmap to identify what devices are running on their systems, discovering hosts...

Kafka – The important configuration

Article This article points out certain high-level points that you should think about before deploying the Kafka cluster into production. It's divided into 3 parts: Tuning Kafka Producers, Tuning Kafka Consumers, and...

Script to create statuspage.io scheduled incident

StatusPage.io is the #1 status and incident communication tool. Here is the script to create a scheduled incident page for your website. Get all components information: Create a scheduled incident:  

What Is a Cloud Architect?

The cloud architect is responsible for the entirety of cloud computing initiatives within an organization and for directing the architectural aspects of a cloud brokering team across all aspects of IT...

18 Disruptive Technology Trends For 2018

Over the coming year, what will be the most important developments in disruptive technology? When we think about technology, we often think about physical devices that are electrical or digital. In fact...

What is JSESSIONID in J2EE Web application – JSP Servlet?

What is JSESSIONID in JSP-Servlet JSESSIONID is a cookie generated by Servlet containers like Tomcat or Jetty and used for session management in J2EE web application for HTTP protocol. Since HTTP is...

[Linux For Beginners] Linux Users and Permissions

This tutorial will provide you with an explanation of how Linux users organized, what permissions are, how they work, and how to manage them. A number of examples will be provided...

How to auto disconnect inactive users after a period of time in Linux

If there are many users who access to your system, it’s dangerous and resource-consuming when users keep their ssh connection for a long time. In this post, I would like to...