System Code Geeks Operating System Developers Resource Center

Here at System Code Geeks we know how much you love books about system administration; we are geeks ourselves. After all, a geek that respects himself should always have his face in a book, he has to keep up with the latest technologies and developments. For this reason, we have decided to distribute 6 of our books for free. You ...

Hello readers, in this tutorial, we will learn how to rename a file in the Linux operating system. For this tutorial, we will rename a file either: By using the mv command to rename the file Using rename command 1. Introduction Renaming files in Linux is not an advanced option, but it’s surely the interesting one. Developers know that Linux ...

This installation needs to have the Red Hat Middleware product streams installed (pre-configured container options) and all the extras like source to image and .Net Core containers.Since the release of the OpenShift Container Platform  it has been my desire to provide a simple, fully configured and easy to use installation. Since I last updated this project, OpenShift Container Platform 3.9 ...

Hello readers, in this tutorial, we will learn how to shut down a Linux system using the shutdown command. 1. Introduction The shutdown command in the Linux system powers down the system in a safe and secure manner. During the system power down process, all logged-in users are notified about the system shutdown and the login operations are blocked. This ...

My relationship with the terminal—especially Windows PowerShell—has been a bit of a roller coaster. I first discovered the terminal when I heard about Python and didn’t know anything about anything. Like the average person who uses computers for games and applications like Excel and PowerPoint, I went to the site, downloaded the installer, installed it, and clicked the icon. Imagine ...

Kubernetes config maps and secrets allow use to inject configuration files into containers. If we want multiple config entries that originate from different config maps or secrets to be injected into the same location, we are required to specify a sub path: kind: Deployment apiVersion: apps/v1 metadata: name: hello-world spec: replicas: 1 template: metadata: labels: app: hello-world spec: containers: - ...

Hello readers! A process on a Linux system is defined as an occurrence of a running application or task. In this tutorial, we will learn how to terminate a suspended or hung up process or an entire process group using the kill command in Linux. 1. Introduction A process on a Linux system is defined as an occurrence of a ...

Unix-like operating systems decouple the user name from the user identity, so you may safely change the name without affecting the ID. All permissions, files, etc are tied to your identity (uid), not your username. To manage every aspect of the user database, you use the usermod tool. 1- To change username (it is probably best to do this without ...

Java With the Best Virtual Conference is your guide to Microservices, Java 9, Kubernetes and everything else Java! Tune in April 17th-18th to access 50+ live Java tech talks by industry-leaders from companies like Pivotal, RedHat, Microsoft, Oracle and Netflix. Our featured speakers include:   Reza Rahman (CapTech) – Java EE 8 and the Open Future of Java EE – ...

Linux is all about simplicity. Simple and time-tested tools like iptables, netstat and rsync can be called for help for basic tasks instead of untrusted third-party tools as happens in case of Windows. If you are a desktop user, then taking frequent backups of your data to a pen-drive or external disk is a typical problem to solve. In this ...