Introduction
In this tutorial we learn how to install libfreemarker-java on Ubuntu 22.04.
What is libfreemarker-java
libfreemarker-java is:
FreeMarker is a “template engineâ€; a generic tool to generate text output
(anything from HTML to autogenerated source code) based on templates. It’s a
Java package, a class library for Java programmers. It’s not an application
for end-users in itself, but something that programmers can embed into their
products.
FreeMarker is designed to be practical for the generation of HTML Web pages,
particularly by servlet-based applications following the MVC (Model View
Controller) pattern. The idea behind using the MVC pattern for dynamic Web
pages is that you separate the designers (HTML authors) from the programmers.
Everybody works on what they are good at. Designers can change the appearance
of a page without programmers having to change or recompile code, because the
application logic (Java programs) and page design (FreeMarker templates) are
separated. Templates do not become polluted with complex program fragments.
This separation is useful even for projects where the programmer and the HMTL
page author is the same person, since it helps to keep the application clear
and easily maintainable.
There are three methods to install libfreemarker-java on Ubuntu 22.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install libfreemarker-java Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install libfreemarker-java using apt-get by running the following command:
sudo apt-get -y install libfreemarker-java
Install libfreemarker-java Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install libfreemarker-java using apt by running the following command:
sudo apt -y install libfreemarker-java
Install libfreemarker-java Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install libfreemarker-java using aptitude by running the following command:
sudo aptitude -y install libfreemarker-java
How To Uninstall libfreemarker-java on Ubuntu 22.04
To uninstall only the libfreemarker-java package we can use the following command:
sudo apt-get remove libfreemarker-java
Uninstall libfreemarker-java And Its Dependencies
To uninstall libfreemarker-java and its dependencies that are no longer needed by Ubuntu 22.04, we can use the command below:
sudo apt-get -y autoremove libfreemarker-java
Remove libfreemarker-java Configurations and Data
To remove libfreemarker-java configuration and data from Ubuntu 22.04 we can use the following command:
sudo apt-get -y purge libfreemarker-java
Remove libfreemarker-java configuration, data, and all of its dependencies
We can use the following command to remove libfreemarker-java configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge libfreemarker-java
References
Summary
In this tutorial we learn how to install libfreemarker-java package on Ubuntu 22.04 using different package management tools: apt, apt-get and aptitude.
