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Master Ruby Version Management on Ubuntu with RVM: A Comprehensive Guide

Installing Ruby on Ubuntu 20.04: Everything You Need to Know

Ruby is a dynamic programming language that is popular among web application developers and programmers. It is often used for building web applications, data analysis, and automation.

In this article, we will explore the different ways you can install Ruby on Ubuntu 20.04, as well as the libraries and compilers needed to run it.

Installing Ruby from Ubuntu Repositories

The easiest way to install Ruby on Ubuntu 20.04 is through the apt package manager, which simplifies the installation process by managing dependencies and updates. To install the Ruby package, open a terminal and type the following command:

“`

sudo apt install ruby

“`

This command installs the latest version of Ruby available in the Ubuntu repositories. However, if you need a specific version of Ruby, you can install it by specifying the version number with the command.

For example:

“`

sudo apt install ruby2.7

“`

Installing Ruby using Rbenv

Rbenv is a lightweight Ruby version manager that allows you to install and manage multiple Ruby versions on the same machine. Rbenv provides a more flexible and customizable approach to managing Ruby versions compared to the system-wide Ruby installation.

To install Rbenv, type the following commands in the terminal:

“`

sudo apt update

sudo apt install git curl autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm6 libgdbm-dev

git clone https://github.com/rbenv/rbenv.git ~/.rbenv

echo ‘export PATH=”$HOME/.rbenv/bin:$PATH”‘ >> ~/.bashrc

echo ‘eval “$(rbenv init -)”‘ >> ~/.bashrc

source ~/.bashrc

“`

Once Rbenv is installed, you can install Ruby by running the following command:

“`

rbenv install {version}

“`

Replace ‘{version}’ with the version of Ruby you want to install. For example, to install Ruby 2.7.2, type:

“`

rbenv install 2.7.2

“`

Installing Ruby using RVM

RVM (Ruby Version Manager) is another popular option for managing multiple Ruby environments. RVM is a command-line tool that allows you to install and manage different versions of Ruby and Ruby on Rails on the same machine effortlessly.

Installing RVM involves several steps. First, you need to install the dependencies required by RVM and Ruby.

Run the following command in the terminal:

“`

sudo apt update

sudo apt install git curl autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm6 libgdbm-dev libdb-dev

“`

Next, install RVM by entering the following command:

“`

curl -sSL https://get.rvm.io | bash -s stable –ruby

“`

This command installs the latest stable version of RVM with Ruby. Once the installation completes, run the following command to reload RVM and verify the installation:

“`

source ~/.rvm/scripts/rvm

rvm -v

“`

Finally, install the desired version of Ruby using the following command:

“`

rvm install {version}

“`

Replace ‘{version}’ with the version of Ruby you want to install. For example, to install Ruby 2.7.2, type:

“`

rvm install 2.7.2

“`

Libraries and Compilers for Ruby

Before you can install Ruby using the above methods, you need to make sure that your Ubuntu 20.04 machine has the necessary libraries and compilers installed. These libraries and compilers are essential for building Ruby from source.

The required libraries and compilers include:

– git: Source control management tool

– curl: Command-line tool for transferring data over the internet

– autoconf: A tool for generating configure scripts

– bison: A parser generator that is used to generate lexical analyzers

– build-essential: A package that contains essential development tools

– libssl-dev: Development files for OpenSSL

– libyaml-dev: YAML 1.1 parser and emitter

– libreadline6-dev: Development files for GNU readline

– zlib1g-dev: Compression library

– libncurses5-dev: Library for terminal handling

– libffi-dev: Development files for libffi

– libgdbm6: GNU dbm database routines

– libgdbm-dev: Development files for GNU dbm database routines

– libdb-dev: Berkeley v4.8|v5.3|v6.2 compatible db library [development files]

To install these libraries and compilers, run the following command in your terminal:

“`

sudo apt install git curl autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm6 libgdbm-dev libdb-dev

“`

Conclusion

In this article, we have explored the different methods of installing Ruby on Ubuntu 20.04. We have also covered the libraries and compilers required to run Ruby on your system.

Whether you choose to install Ruby from the Ubuntu repositories or through a version manager like Rbenv or RVM, having the necessary libraries and compilers is crucial. By following the steps outlined in this article, you should be able to install and run Ruby on your Ubuntu 20.04 machine with confidence.

Installing Ruby on Ubuntu 20.04: A Comprehensive Guide

Ruby is a versatile programming language that is well-suited for developing web applications, data analysis, and automation. If you’re using Ubuntu 20.04, you have several options for installing Ruby, including the apt package manager and the Rbenv version manager.

In this guide, we’ll explore how to install Ruby using each of these methods, as well as how to manage different versions of Ruby on your system.

Installing Ruby Using Ubuntu Repositories

If you simply want to install the most recent stable version of Ruby available for Ubuntu 20.04, the easiest approach is to use the apt package manager. Here’s how to do it:

1.

Open a terminal window and run the following command to update your package list:

“`

sudo apt update

“`

2. Next, run the following command to install Ruby:

“`

sudo apt install ruby

“`

If you want to install a specific version of Ruby, you can modify the command to specify the version number. For example, to install Ruby 3.0.2, you can use the following command:

“`

sudo apt install ruby3.0

“`

Once the installation is complete, you can check the version of Ruby that was installed using the following command:

“`

ruby -v

“`

This should display the version of Ruby that you installed.

Installing Ruby Using Rbenv

Rbenv is a popular Ruby version manager that allows you to install and manage multiple versions of Ruby on your system. Using Rbenv can be useful when you need to work on projects that require different Ruby versions, or if you want to test your code against different versions of Ruby.

Here’s how to install Ruby using Rbenv:

1. Install Required Libraries and Compilers: First, you need to make sure that your system has the required libraries and compilers.

Run the following command in your terminal:

“`

sudo apt-get install autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm-dev

“`

2. Install Rbenv: Next, you’ll need to install Rbenv itself.

You can do this using a script that automates the process. Run the following commands in your terminal:

“`

curl -fsSL https://github.com/rbenv/rbenv-installer/raw/main/bin/rbenv-installer | bash

“`

This will install Rbenv and any necessary dependencies.

Once the installation is complete, restart your terminal or open a new terminal window to ensure that your changes take effect. To check that Rbenv is installed correctly, run the following command in your terminal:

“`

rbenv -v

“`

This should display the version of Rbenv that you installed. 3.

Install Ruby using Rbenv: Now that Rbenv is installed, you can use it to install a specific version of Ruby. For example, to install Ruby 3.0.2, you can use the following command:

“`

rbenv install 3.0.2

“`

This will download and install Ruby 3.0.2. Once the installation is complete, you can set this version of Ruby as the default for your system by running the following commands:

“`

rbenv global 3.0.2

rbenv rehash

“`

These commands will tell Rbenv to use Ruby 3.0.2 by default whenever you run Ruby-related commands. You can verify that Ruby is working correctly using the following command:

“`

ruby -v

“`

Managing Ruby Versions with Rbenv

One of the key benefits of using Rbenv is the ability to manage multiple versions of Ruby on your system. Here are some tips for managing different versions of Ruby using Rbenv:

1.

Setting Up Rbenv: Once you’ve installed Rbenv, you’ll need to add some configuration to your shell to activate Rbenv whenever you launch a new terminal. You can do this by adding the following lines to your shell configuration file (e.g. .bashrc or .zshrc):

“`

export PATH=”$HOME/.rbenv/bin:$PATH”

eval “$(rbenv init -)”

“`

These lines add the Rbenv bin directory to your PATH, which allows your shell to find the Rbenv executable.

It also initializes Rbenv in your shell session. 2.

Shims: Rbenv uses a mechanism called shims to ensure that the correct version of Ruby is used when you run a Ruby-related command. Shims are lightweight executables that intercept calls to a system Ruby and redirect them to the appropriate version of Ruby for your project.

You don’t need to do anything special to use shims Rbenv handles it automatically. 3.

Shell Version: You can set a version of Ruby to be used only by the current shell session by running the following command:

“`

rbenv shell 3.0.2

“`

This tells Rbenv to use Ruby 3.0.2 only for the current shell session. Any subsequent shell sessions will use the default version of Ruby unless you specify a different version.

4. Local Version: You can set a version of Ruby to be used for a specific project directory by creating a file named .ruby-version in the project directory and entering the desired version number.

For example:

“`

echo “3.0.2” > .ruby-version

“`

This tells Rbenv to use Ruby 3.0.2 for any Ruby-related commands executed within the project directory. 5.

Global Version: You can set a default version of Ruby to be used for all projects by running the following command:

“`

rbenv global 3.0.2

“`

This tells Rbenv to use Ruby 3.0.2 by default. Any projects that don’t have a local .ruby-version file will use this version of Ruby.

6. Sudo: If you need to run a Ruby-related command with elevated privileges using sudo, you’ll need to use the rbenv sudo command to ensure that the correct version of Ruby is used.

For example:

“`

rbenv sudo gem install some_gem

“`

This tells Rbenv to use the correct version of Ruby when running the gem command with sudo.

Conclusion

In this guide, we’ve explored how to install and manage Ruby on Ubuntu 20.04 using both the apt package manager and the Rbenv version manager. By following these instructions, you should be able to install and work with different versions of Ruby on your system with confidence and ease.

Whether you’re a seasoned Ruby developer or just getting started with the language, you’ll find these tools indispensable for managing your Ruby projects. Installing Ruby Using RVM: Take Control of Your Ruby Versions

If you’re a developer who needs to manage multiple Ruby environments or work with different versions of Ruby, RVM (Ruby Version Manager) is an excellent tool.

RVM provides a way to install and manage multiple Ruby versions on a per-user basis, giving you more flexibility and control over your Ruby installations. In this guide, we’ll walk you through the process of installing RVM and using it to manage your Ruby versions.

Installing RVM

Before you can start using RVM, you need to install it on your Ubuntu 20.04 system. Here are the steps to get started:

1.

Importing GPG Keys: RVM uses GPG keys to verify the integrity of its packages. Open a terminal and run the following command to import the RVM GPG keys:

“`

gpg –keyserver hkp://keys.gnupg.net –recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

“`

2.

Installing RVM: Once the GPG keys are imported, you can install RVM using the following command:

“`

curl -sSL https://get.rvm.io | bash -s stable

“`

This will download and install RVM along with its dependencies. After the installation is complete, close and reopen your terminal to start using RVM.

Setting up RVM

Now that RVM is installed on your system, you need to set it up to start managing your Ruby versions. Follow these steps:

1.

Source the RVM Setup Script: Open a new terminal window and run the following command to source the RVM setup script:

“`

source ~/.rvm/scripts/rvm

“`

This command loads the RVM environment into your current shell session so that you can use RVM commands. 2.

Listing Known Ruby Versions: You can view a list of known Ruby versions that RVM can install by running the following command:

“`

rvm list known

“`

This will display a list of available Ruby versions, including the latest stable versions and any other versions that RVM supports.

Managing Ruby Versions with RVM

One of the major advantages of RVM is its ability to manage multiple Ruby versions on your system. Here are some common tasks you can perform with RVM:

1.

Installing the Latest Stable Version: To install the latest stable version of Ruby, run the following command:

“`

rvm install ruby

“`

This command will download and install the most recent stable version of Ruby available. 2.

Setting the Default Version: You can set a default Ruby version to be used across all projects by running the following command:

“`

rvm use ruby –default

“`

This will make the specified Ruby version the default version for new terminal sessions. 3.

Installing a Specific Version: If you want to install a specific version of Ruby, you can specify it using the rvm install command. For example, to install Ruby 3.0.2, run the following command:

“`

rvm install 3.0.2

“`

This will download and install Ruby 3.0.2.

4.

Switching to Another Version: To switch to a different Ruby version that you have installed, use the rvm use command followed by the version number. For example, to switch to Ruby 3.0.2, run the following command:

“`

rvm use 3.0.2

“`

This will switch to Ruby 3.0.2 for the current terminal session.

5. Using Gemsets: RVM allows you to create and manage gemsets, which are isolated sets of gems that can be associated with a specific Ruby version.

This can be useful when you need to work on projects that require different gem dependencies. To create a gemset for a specific Ruby version, use the following command:

“`

rvm gemset create

“`

Replace with the desired name for your gemset.

Then, to use the gemset, use the following command:

“`

rvm use @

“`

Replace with the desired Ruby version and with the gemset you created. This will activate the specified Ruby version and gemset for your current terminal session.

Conclusion

In this guide, we have explored how to install and use RVM to manage Ruby versions on your Ubuntu 20.04 system. We have covered the installation process, setting up RVM, and managing Ruby versions using RVM commands.

By using RVM, you can easily switch between different Ruby versions, create isolated gemsets, and have more control over your Ruby development environment. Whether you’re working on multiple projects with different Ruby requirements or simply want to experiment with different Ruby versions, RVM is a powerful tool that can simplify and enhance your Ruby development experience.

In conclusion, installing Ruby on Ubuntu 20.04 can be done using various methods, including the apt package manager, Rbenv, and RVM. Each method offers its own benefits, such as simplicity with apt, flexibility and multiple versions with Rbenv, and per-user management with RVM.

By following the installation and management steps outlined in this guide, developers can take control over their Ruby versions, easily switch between versions, and create isolated gemsets for different projects. Whether you’re a seasoned Ruby developer or just starting, having the ability to manage Ruby versions empowers you to work efficiently and adapt to different project requirements.

Embrace the flexibility and control that these tools offer to elevate your Ruby development experience.

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