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This self-study course written as a book is your first step towards making money by coding and programming from home, and having fun doing it. You will understand how the Ruby language works, and establish a foundation for being a successful freelance developer. This course gives you not only technical detail, but presents knowledge in a friendly format, understandable by all ages, providing a thorough explanation of modern concepts for absolute beginners.

In this course you will find 78 easy to follow tasks, so even people without any programming skill can solve them. Beginners will learn how to create, debug, and understand programs in Ruby. Those who are already familiar with the language will rediscover object-oriented concepts, memory organization, find career advice, and save the planet from a nuclear apocalypse.

Ready to dive into one of the most influential and demanding third generation programming languages? Let's tune in!

The Handbook for Ruby Developers

## What is Ruby Version Manager (RVM)

This chapter is essential for Ruby beginners. Now that we know how Ruby works and have done many exercises, we can practice by setting up some valuable tools.

RVM is a thin layer for our shell or IDE. Every programmer often runs the Ruby application with `ruby app.rb`, but where does the actual `ruby` come from? Let’s look at the `which` command output when RVM isn’t installed:


```shell
$ which ruby
/usr/bin/ruby
```

So, the Ruby programming language is just a binary executable file located at `/usr/bin/ruby`. Here is what it looks like when we open it with Far Manager:

# What is Ruby Version Manager (RVM)

This chapter is essential for Ruby beginners. Now that we know how Ruby works and have done many exercises, we can practice by setting up some valuable tools.

RVM is a thin layer for our shell or IDE. Every programmer often runs the Ruby application with `ruby app.rb`, but where does the actual `ruby` come from? Let’s look at the `which` command output when RVM isn’t installed:


```shell
$ which ruby
/usr/bin/ruby
```

So, the Ruby programming language is just a binary executable file located at `/usr/bin/ruby`. Here is what it looks like when we open it with Far Manager:

# What is Ruby Version Manager (RVM)

This chapter is essential for Ruby beginners. Now that we know how Ruby works and have done many exercises, we can practice by setting up some valuable tools.

RVM is a thin layer for our shell or IDE. Every programmer often runs the Ruby application with `ruby app.rb`, but where does the actual `ruby` come from? Let’s look at the `which` command output when RVM isn’t installed:


```shell
＄ which ruby
/usr/bin/ruby
```

So, the Ruby programming language is just a binary executable file located at `/usr/bin/ruby`. Here is what it looks like when we open it with Far Manager:

Learn what is RVM and how to use it in your shell.

Before We Begin

First Steps

Fundamentals of Ruby

Conditional Statements

Operators and Methods

Arrays

Hash

Fun with Object Oriented Programming

Debugging in Ruby

Ruby Version Manager

Testing Ruby Programs

Wrap Up!

Appendix

Introduction to the Version Management

What is Ruby Version Manager (RVM)