How To Install jruby on Debian 9

In this tutorial we learn how to install jruby on Debian 9. jruby is 100% pure-Java implementation of Ruby

Introduction

In this tutorial we learn how to install jruby on Debian 9.

What is jruby

jruby is:

JRuby is a high performance, stable, fully threaded Java implementation of the Ruby programming language.

JRuby is tightly integrated with Java to allow the embedding of the interpreter into any Java application with full two-way access between the Java and the Ruby code (similar to Jython for the Python language).

JRuby provides a complete set of core “builtin” classes and syntax for the Ruby language, as well as most of the Ruby Standard Libraries. The standard libraries are mostly Ruby’s own complement of “.rb” files, but a few that depend on C language-based extensions have been reimplemented. Some are still missing, but JRuby hopes to implement as many as is feasible.

There are three methods to install jruby 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 jruby Using apt-get

Update apt database with apt-get using the following command.

sudo apt-get update

After updating apt database, We can install jruby using apt-get by running the following command:

sudo apt-get -y install jruby

Install jruby Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install jruby using apt by running the following command:

sudo apt -y install jruby

Install jruby 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 jruby using aptitude by running the following command:

sudo aptitude -y install jruby

How To Uninstall jruby on Debian 9

To uninstall only the jruby package we can use the following command:

sudo apt-get remove jruby

Uninstall jruby And Its Dependencies

To uninstall jruby and its dependencies that are no longer needed by Debian 9, we can use the command below:

sudo apt-get -y autoremove jruby

Remove jruby Configurations and Data

To remove jruby configuration and data from Debian 9 we can use the following command:

sudo apt-get -y purge jruby

Remove jruby configuration, data, and all of its dependencies

We can use the following command to remove jruby configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge jruby

Dependencies

jruby have the following dependencies:

References

Summary

In this tutorial we learn how to install jruby package on Debian 9 using different package management tools: apt, apt-get and aptitude.