What's New in Liberty 21.0.0.12? Features, Benefits, and Requirements
How to Download Liberty 21.0.0.12
If you are looking for a fast, lightweight, and flexible Java application server, you might want to consider Liberty 21.0.0.12, the latest version of the WebSphere Application Server Liberty profile.
In this article, we will explain what Liberty 21.0.0.12 is, what features and benefits it offers, what prerequisites and system requirements you need to install it, and how to download it for different platforms.
download liberty 21.0.0.12
What is Liberty 21.0.0.12?
Liberty 21.0.0.12 is a fix pack for WebSphere Application Server Liberty, a dynamic and modular Java application server that enables you to run only the features you need for your applications.
Liberty 21.0.0.12 was released on November 26, 2021, and it includes several bug fixes and enhancements, such as:
Jakarta EE 9.1 support, which enables you to run applications that use the latest Jakarta EE APIs and specifications
Configurable response headers, which allow you to customize the HTTP response headers sent by your applications
Improved performance and stability for various features and components
Features and benefits of Liberty 21.0.0.12
Some of the main features and benefits of Liberty 21.0.0.12 are:
It is fast to start up and has a low memory footprint, which makes it ideal for cloud-native applications and microservices
It supports a wide range of Java standards and technologies, such as Java EE, Jakarta EE, MicroProfile, Spring Boot, OSGi, and more
It allows you to dynamically add or remove features without restarting the server, which increases your productivity and flexibility
It provides a simple and intuitive configuration model based on XML files, which makes it easy to manage and customize your server
It offers various tools and integrations for development, testing, deployment, monitoring, and administration of your applications
It is compatible with Open Liberty, an open source version of Liberty that provides the same core features and functions
Prerequisites and system requirements for Liberty 21.0.0.12
Before you download and install Liberty 21.0.0.12, you need to verify that your system meets the relevant requirements listed on .
Some of the general requirements are:
A supported operating system, such as Windows, Linux, z/OS, or IBM i
A supported Java SDK, such as IBM Java SDK or Oracle Java SDK
A supported web browser, such as Chrome, Firefox, Edge, or Safari
A supported database server, such as DB2, Oracle, MySQL, or PostgreSQL
A supported web server or proxy server, such as IBM HTTP Server or Apache HTTP Server
Adequate disk space How to download Liberty 21.0.0.12 for different platforms
Once you have checked the prerequisites and system requirements, you can proceed to download Liberty 21.0.0.12 for your preferred platform.
How to download liberty 21.0.0.12 for all platforms
Download liberty 21.0.0.12 fix pack for websphere application server
Liberty 21.0.0.12 installation archives with all features
Liberty 21.0.0.12 convenience zip files for jakarta ee 9
Liberty 21.0.0.12 license upgrade archives for offline installation
Liberty 21.0.0.12 cloud packages for liberty buildpack and open liberty
Liberty 21.0.0.12 local repository files for installation manager
Liberty 21.0.0.12 java sdk packages for websphere liberty
Liberty 21.0.0.12 ibm http server and web server plug-ins
Liberty 21.0.0.12 support for jakarta ee platform version 9.1
Liberty 21.0.0.12 what is new in this release of liberty
Liberty 21.0.0.12 known side effects and regression list
Liberty 21.0.0.12 system requirements and supporting software
Liberty 21.0.0.12 update strategy and continuous fix pack delivery
Liberty 21.0.0.12 download instructions and product documentation
Liberty 21.0.0.12 websphere liberty operator for kubernetes
Liberty 21.0.0.12 microprofile programming model support
Liberty 21.0.0.12 admin center server config tool enhancements
Liberty 21.0.0.12 server stop command timeout option
Liberty 21.0.0.12 open tracing feature deprecation notice
Download liberty 21.0.0.12 for linux on power or linux on ibm z platform
Download liberty 21.0.0.12 for z/os or ibm i operating system
Download liberty 21.0.0.12 for windows or mac os x environment
Download liberty 21.0.0.12 for docker or containerized deployment
Download liberty 21.0.0.12 for eclipse or visual studio code development tools
Download liberty 21,000,012 for java se version 8,11, or 17 compatibility
Download liberty 21,000,012 for java ee version 7 or version 8 support
Download liberty 21,000,012 for osgi applications or kernel features
Download liberty 21,000,012 for network deployment or base edition products
Download liberty 21,000,012 for core edition or express edition products
How to install liberty 21,000,012 by using installation manager or command line tools
How to install liberty 21,000,012 by using online product repositories or passport advantage online
How to install liberty 21,000,012 by using directory-based repository or archive packages
How to install liberty 21,000,012 by using cloud foundry cli or helm charts tools
How to install liberty 21,000,012 by using maven plugin or gradle plugin tools
How to update liberty from previous versions to version 21,000,012 by using installation manager or command line tools
How to update liberty from previous versions to version 21,000,012 by using online product repositories or passport advantage online
How to update liberty from previous versions to version 21,000,012 by using directory-based repository or archive packages
How to update liberty from previous versions to version 21,000,012 by using cloud foundry cli or helm charts tools
How to update liberty from previous versions to version 21,000,012 by using maven plugin or gradle plugin tools
How to uninstall liberty version 21,000,012 by using installation manager or command line tools
How to uninstall liberty version 21,000,012 by using online product repositories or passport advantage online
How to uninstall liberty version 21,000,012 by using directory-based repository or archive packages
How to uninstall liberty version 21,000,012 by using cloud foundry cli or helm charts tools
How to uninstall liberty version 21,000,012 by using maven plugin or gradle plugin tools
How to configure liberty version 21,000,012 by using server.xml file or environment variables
How to configure liberty version 21,000,012 by using admin center tool or rest api
How to configure liberty version 21,000,012 by using bootstrap.properties file or jvm.options file
How to configure liberty version 21,000,012 by using server.env file or shared.config.dir
There are two main ways to download Liberty 21.0.0.12: using IBM Installation Manager or using ZIP files.
IBM Installation Manager is a tool that helps you install, update, and manage Liberty and other IBM software products. It also provides a graphical user interface and a command-line interface for your convenience.
ZIP files are compressed files that contain the Liberty binaries and configuration files. You can extract them to any location on your system and run Liberty from there.
The following sections will explain how to download Liberty 21.0.0.12 for Windows, Linux, z/OS, and IBM i using both methods.
Download Liberty 21.0.0.12 for Windows
If you want to download Liberty 21.0.0.12 for Windows, you can choose either of the following options:
Using IBM Installation Manager
Download the IBM Installation Manager installer from .
Run the installer and follow the instructions to install IBM Installation Manager on your system.
Launch IBM Installation Manager and click File > Preferences > Repositories.
Add the following repository URL: .
Click OK and then click Install on the main window.
Select WebSphere Application Server Liberty Core V21.0 from the list of available packages and click Next.
Accept the license agreement and click Next.
Select the installation directory and click Next.
Review the summary and click Install to start the installation process.
Wait for the installation to complete and click Finish.
Using ZIP files
Download the ZIP file for Liberty 21.0.0.12 from .
Extract the ZIP file to any location on your system.
Navigate to the bin folder inside the extracted folder and run server.bat create defaultServer to create a default server instance.
Run server.bat start defaultServer to start the server.
Download Liberty 21.0.0.12 for Linux
If you want to download Liberty 21.0.0.12 for Linux, you can choose either of the following options:
Using IBM Installation Manager
Download the IBM Installation Manager installer from .
Extract the installer to any location on your system and run ./install to launch it.
Follow the instructions to install IBM Installation Manager on your system.
Launch IBM Installation Manager and click File > Preferences > Repositories.
Add the following repository URL: .
Click OK and then click Install on the main window.
Select WebSphere Application Server Liberty Core V21.0 from the list of available packages and click Next.
Accept the license agreement and click Next.
Select the instal