Linux

GNS3 is an open source Network Simulator that is used to emulate, configure, test and troubleshoot virtual and real networks. GNS3 can run on Windows, Linux and MacOS. It can also run on a virtualized environment such as VMware, Docker and Virtualbox. Below are some of the features of GNS3: …

Python is a very powerful high-level programming language that has seen extensive adoption in modern applications development. Python programs are remarkably easy to write when compared to other programming languages. There are lots of resources that can help you start your Python programming journey. In this article you’ll learn to …

Since October 2020, Github made change about naming master branch to main branch as default when you create a repository. So how about the existing repository and you want to change to main branch as default. Here is how to do it in three steps. # Step 1 # create …

PHP 8.0 is a major release of the PHP programming Language mostly used in the Development of Web Applications. It is the stable release and you can plan to migrate your applications but being aware that some could break especially where old features are deprecated. In this article we will cover …

Hello good people. In today’s blog post we will be showing you how to create a Droplet in DigitalOcean using Terraform. Terraform is an IaC and automation software tool created to enable Developers and SysAdmins to define and provision data center infrastructure using a declarative configuration language known as HashiCorp …

PHP 8 was released on November 26, 2020 and is ready for download and use in your Applications development journey. PHP 8.0 is a major update of the PHP language with many new features, optimizations which includes named arguments, union types, attributes, constructor property promotion, match expression, nullsafe operator, JIT, …

Rsync (Remote Sync) is a fast and versatile command-line tool for synchronizing files and folders between two locations via a remote shell, or to a remote rsync daemon. Rsync allows incremental file transfers by only transferring the differences between source and destination locations. Rsync can be used to mirror data, …

Rancher is an open source container management platform. This allows you to easily run and manage Docker and Kubernetes. Rancher provides infrastructure services such as multi-host networking, load balancing, and volume snapshots. In this tutorial, I’ll walk you through installing and configuring a Rancher and Proxy server step-by-step on a …

In the GNU Coreutils package> = 7.5, command sort Provides the -h parameter which allows easy reading of numbers of this size (eg 10K 15M 1G etc.). Helps compare and shorten “du -h” results. du -h * | sort -h The above results will appear in descending order. You can …

A properly configured firewall is one of the most important aspects of system security overall. FirewallD is a complete firewall solution for managing iptables rule system and provides D-Bus interface to run. Starting with CentOS 7, FirewallD has replaced iptables as the default firewall management tool. In this tutorial, we’ll …