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How to check if a variable is set in Bash?

Question Answers Short Approach Full explanation Question For example, how do I check if the user gave the first parameter to a function?

How to use multiple Java Development Kit

Intro Getting Started References Intro SDKMAN! is a tool for managing parallel versions of multiple Software Development Kits on most Unix based systems.

Saying Hello World with Ruby On Rails

Intro Getting Started with Ruby Installing Ruby Installing Rails Say Hello World! Using one command line Using Puts function Using object oriented version Using Sinatra and puma Use a container application Demo Intro As an SRE engineer, you have to approximate the Developer Teams talking in the same language.

Create a simple spring boot application using gradle

Overview To create a simple spring boot application, as the very famous example “Hello World!”, you don’t need to use an IDE software. Fortunately, you can use only gradle CLI, and the Gradle website explains how to do this via its simple tutorial.

Using dnsmasq with networkManager in Ubuntu 20.04

Overview Remote work has been increased since covid-19. VPN appliances turned crucial devices and employees has been using more than ever their companies internal services. VPN often need to setup your DNS configuration in order to use the internal DNS server of the company, so you can resolve hostnames or services offer by your company.

Deploy NGINX container using Terraform

Intro Terraform is a excellent tool to provide infrastructure as code in your organization. Commonly, it is use to work in cloud infrastructure environments, however it can also be used with others providers (not only cloud providers), one example is use docker service as a provider.