Arjun  Goodwin

Arjun Goodwin


Cómo instalar Java con Apt en Ubuntu 20.04

Se necesitan Java y JVM (la máquina virtual de Java) para muchos tipos de software, como Tomcat, Jetty, Glassfish, Cassandra y Jenkins.

A través de esta guía, instalará varias versiones de Java Runtime (JRE) y el kit de desarrollo de Java (JDK) utilizando apt. Instalará OpenJDK y la versión oficial de JDK de Oracle. Luego, seleccionará la versión que desee utilizar para sus proyectos. Cuando termine, podrá utilizar el JDK para desarrollar software o emplear Java Runtime para ejecutar software.


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Cómo instalar Java con Apt en Ubuntu 20.04
Shawn  Pieterse

Shawn Pieterse


How to Install Java on Ubuntu 20.04 Using Apt

Java  is one of the most popular programming languages and the JVM  (Java’s virtual machine ) is the run-time environment to run Java applications. These two platforms are required for much popular software that includes TomcatJettyCassandraGlassfish,  and Jenkins .

Installing the Default JRE in Ubuntu

The painless way for installing Java is to use the version that comes with Ubuntu repositories. By default, Ubuntu packages with OpenJDK 11, which is an open-source alternative of the JRE and JDK.

Installing the Default JDK in Ubuntu

Once JRE installed, you might also need the JDK (Java Development Kit) in order to compile and run a Java-based application.

#java #ubuntu #ubuntu tips #apt #ubuntu 20.04

Tyrique  Littel

Tyrique Littel


How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment

Shawn  Pieterse

Shawn Pieterse


Upgrade Ubuntu 20.04/20.10 to 21.04 in 2 Ways (GUI & Terminal)

Ubuntu 21.04, codenamed Hirsute Hippo, is released on April 22, 2021. This tutorial is going to you 2 ways to upgrade Ubuntu 20.04/Ubuntu 20.10 to 21.04. The first method uses the graphical update manager and the second method uses command line. Usually, you use the graphical update manager to upgrade Ubuntu desktop and use the command line to upgrade Ubuntu server, but the command-line method works for desktops too.

Ubuntu 20.04 is a long-term support (LTS) release, which will be supported for 5 years. Ubuntu 21.04 is a non-LTS release, which means it will be supported for 9 months only, until January 2022. If you prefer stability over bleeding edge, then stick with Ubuntu 20.04. But if you are the other way around, you can follow this tutorial to upgrade from Ubuntu 20.04 to 21.04.

#ubuntu #ubuntu desktop #ubuntu server #upgrade #ubuntu 20.04

Alycia  Klein

Alycia Klein


How To Install Jenkins on Ubuntu 20.04 / Ubuntu 18.04

Jenkins is an open-source automation server that helps to automate the repetitive tasks involved in the software development process, which includes building, testing, and deployments.

Jenkins was forked from the Oracle Hudson project and written in Java.

Here, we will see how to install Jenkins on Ubuntu 20.04 / Ubuntu 18.04.

Install Jenkins On Ubuntu 20.04

Install Java

Since Jenkins is written in Java, it requires Java 8 or Java 11 to run. Here, I will install the OpenJDK 11 for Jenkins installation.

sudo apt update

sudo apt install -y default-jre apt-transport-https wget

If you want to use the Oracle Java in place of OpenJDK, then use any one of the links to install it.

READ: How To Install Oracle Java on Ubuntu 20.04

READ: How To Install Oracle Java on Ubuntu 18.04

Verify the Java version after the installation.

java -version


openjdk version "11.0.8" 2020-07-14
OpenJDK Runtime Environment (build 11.0.8+10-post-Ubuntu-0ubuntu120.04)
OpenJDK 64-Bit Server VM (build 11.0.8+10-post-Ubuntu-0ubuntu120.04, mixed mode, sharing)

Add Jenkins Repository

Jenkins provides an official repository for its packages. To use the Jenkins repository, first, we will need to add the Jenkins public key to the system.

wget -q -O - | sudo apt-key add -

Then, add the Jenkins repository to your system.

echo "deb binary/" | sudo tee /etc/apt/sources.list.d/jenkins.list

Install Jenkins

Install Jenkins package using the apt command.

sudo apt update

sudo apt install -y jenkins

The Jenkins service should now be up and running. You can check the status of the Jenkins service using the below command.

sudo systemctl status jenkins

#ubuntu #jenkins #ubuntu 18.04 #ubuntu 20.04

Cómo instalar y proteger Redis en Ubuntu 20.04

Redis es un sistema de almacenamiento claves-valores en memoria conocido por su flexibilidad, su rendimiento y su soporte amplio en varios idiomas. En este tutorial, se muestra cómo instalar, configurar y proteger Redis en un servidor de Ubuntu 20.04.

Requisitos previos
Para completar esta guía, necesitará acceso a un servidor de Ubuntu 20.04 que tenga un non-root user con privilegios sudo y un firewall configurado con ufw. Puede establecerlos siguiendo nuestra Guía de configuración inicial del servidor para Ubuntu 20.04.

#ubuntu #redis en ubuntu 20.04