How To Install velocity on Debian 9
Introduction
In this tutorial we learn how to install velocity on Debian 9.
What is velocity
velocity is:
Velocity is a Java-based template engine. It permits anyone to use the simple yet powerful template language to reference objects defined in Java code. When Velocity is used for web development, Web designers can work in parallel with Java programmers to develop web sites according to the Model-View-Controller (MVC) model, meaning that web page designers can focus solely on creating a site that looks good, and programmers can focus solely on writing top-notch code. Velocity separates Java code from the web pages, making the web site more maintainable over the long run and providing a viable alternative to Java Server Pages (JSPs) or PHP.
There are three methods to install velocity on Debian 9. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install velocity Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install velocity using apt-get by running the following command:
sudo apt-get -y install velocity
Install velocity Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install velocity using apt by running the following command:
sudo apt -y install velocity
Install velocity 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 Debian. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install velocity using aptitude by running the following command:
sudo aptitude -y install velocity
How To Uninstall velocity on Debian 9
To uninstall only the velocity package we can use the following command:
sudo apt-get remove velocity
Uninstall velocity And Its Dependencies
To uninstall velocity and its dependencies that are no longer needed by Debian 9, we can use the command below:
sudo apt-get -y autoremove velocity
Remove velocity Configurations and Data
To remove velocity configuration and data from Debian 9 we can use the following command:
sudo apt-get -y purge velocity
Remove velocity configuration, data, and all of its dependencies
We can use the following command to remove velocity configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge velocity
Dependencies
velocity have the following dependencies:
References
Summary
In this tutorial we learn how to install velocity package on Debian 9 using different package management tools: apt, apt-get and aptitude.