How to Install Ruby on Ubuntu 22.10 for Amazing App Development

Have you heard about the Ruby programming language and wanted to learn it for yourself? Well, you came to the right place!

In this epic 4,000 word guide, I‘ll be showing you step-by-step how to install Ruby on an Ubuntu 22.10 system. You‘ll learn:

  • Why Ruby is so popular with developers
  • 3 different installation methods – apt, RVM, and rbenv
  • Troubleshooting configuration issues
  • Optimizing performance after setting up Ruby
  • Building your first real Ruby application

…and tons more!

Let‘s get started, friend!

A Brief History of Ruby (And Why It‘s So Loved)

Before we install Ruby, let me give you some background on why this programming language is so revered…

Ruby was created in 1995 by a guy named Yukihiro "Matz" Matsumoto in Japan. Legend says Matz decided to develop Ruby because he wanted to create a language he himself would enjoy using!

The key principles behind Ruby are:

  • Productivity – Ruby uses an elegant syntax that reads like English to help developers write code faster
  • Fun – The language aims to make programming enjoyable for coders
  • Simplicity – Ruby avoids complex features, keeping things clean and intuitive

Since its release, Ruby has become one of the world‘s most popular languages due to its simplicity and developer happiness!

Some amazing web apps built with Ruby include:

  • Twitter
  • GitHub
  • Shopify
  • Airbnb
  • Hulu
  • Basecamp
    …and thousands more!

Ruby‘s main application is web development. The popular Ruby on Rails web framework lets you quickly build complex database-backed applications.

Other uses for Ruby include scripting, data analysis, artificial intelligence, machine learning projects and automation.

Now over to why we‘ll be installing it on Ubuntu…

Why Use Ruby on Ubuntu?

Ubuntu is one of the most popular Linux distributions available. Providing a user-friendly desktop experience, Ubuntu aims to make open-source software accessible for newcomers.

The latest Ubuntu 22.10 release comes with tons of handy tools for developers out of the box, including the Bash terminal, Git, Python, C/C++ compilers and much more.

Pairing Ruby with Ubuntu 22.10 gives us a feature-rich development environment.

Here are some key benefits:

  • Simple installation via apt, allowing managing of Ruby versions
  • Great terminal access for running Ruby code and scripts
  • Automatic updates for Ruby and other dev tools
  • Access to latest Gems for Ruby libraries/frameworks like Rails
  • Tight integration with cutting-edge Linux technologies

Let‘s get Ruby set up!

Prerequisites

Before starting, make sure your Ubuntu 22.10 desktop has the following:

Hardware

Component Recommended Minimum
RAM ≥ 8 GB ≥ 4 GB
Storage ≥ 25 GB free space ≥ 15 GB
CPU Dual-core, ≥2GHz Any

Also required:

  • Internet access

Software

  • Ubuntu 22.10 Desktop installed and updated
  • Terminal/command-line access
  • Some beginner Linux skills

If you‘re new to Linux, learn the basics of using Ubuntu here before proceeding.

Installation Method #1: Apt

The standard way to install Ruby on Ubuntu is by using the apt package manager.

apt comes pre-installed on Ubuntu for managing applications and libraries. Let‘s use it to set up Ruby:

First, update apt‘s package index by running:

sudo apt update

This fetches metadata on the latest available software.

Next, install Ruby through apt with this command:

sudo apt install ruby-full

The full bundle includes the docs, compilers and binaries.

The download and installation process may take a few minutes to complete depending on your internet speed.

Finally, verify Ruby installed properly with:

ruby -v

If set up correctly, you should see the Ruby version printed, e.g:

ruby 3.0.2p107

Boom! Ruby is now ready to roll on Ubuntu!

apt makes setup clean and simple. However, there are some notable downsides:

  • Only installs one Ruby version at a time
  • Can cause compatibility issues with other tools
  • Not the latest Ruby release often

For greater config control, we recommend…

Installation Method #2: RVM

RVM (Ruby Version Manager) is a powerful tool for managing multiple Ruby environments.

While apt ties you to your distro‘s packages, RVM allows installing cutting edge Ruby releases from official sources instead.

Let‘s set up the latest Ruby through RVM:

First import RVM‘s public keys and add the repo:

gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB 

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

Then activate RVM in your shell session:

source ~/.rvm/scripts/rvm

Now let‘s use RVM to actually install the latest Ruby version:

rvm install ruby 

This downloads, compiles and installs the newest Ruby release automatically. Pretty convenient!

Confirm Ruby is ready by printing the version:

ruby -v 

With RVM properly set up, you can now:

  • Install & manage multiple Ruby versions in parallel
  • Create isolated groups of gems called gemsets
  • Set Ruby versions on a per-project basis
  • Easily wipe Ruby and start over if needed!

RVM is a game changer for advanced Ruby development workflows.

However, hand-picking specific Ruby versions can be tricky…

Installation Method #3: rbenv

If RVM seems overly complex, perhaps rbenv is a better fit!

rbenv takes a lightweight approach to:

  • Compiling and installing Ruby versions
  • Integrating tightly with your shell
  • Managing the Ruby environment

Installation takes just a few terminal commands:

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

echo ‘eval "$(rbenv init -)"‘ >> ~/.bashrc
source ~/.bashrc

The installer clones rbenv‘s Git repo to ~/.rbenv, runs the init script, and sets up your PATH accordingly.

After running through installation, use these commands for managing Ruby versions:

# List all available versions
rbenv install -l

# Install a Ruby version 
rbenv install 3.0.2

# Set the global version
rbenv global 3.0.2

Upgrading rbenv itself is also a cinch:

cd ~/.rbenv && git pull

While similar to RVM, rbenv wins points for its simplicity. Pick your fighter!

Now whether you chose apt, RVM or rbenv, you likely want to know…

Troubleshooting Ruby Installation

I‘ll be straight with you friend – issues can pop up when installing Ruby:

  • Encountering weird permission errors
  • Ruby not found on your shell‘s PATH
  • Gems fail installation with OpenSSL crashes
  • RVM or rbenv conflicts with other tools

Not to worry! Here are some handy tips for gettingsorted:

Symptom: bash: ruby: command not found

Fix: Add Ruby‘s install directory to PATH

  • For apt: echo ‘export PATH="/usr/local/bin:$PATH"‘ >> ~/.bashrc
  • For RVM/rbenv: Follow install steps exactly

Symptom: Ruby install fails with permission denied

Fix: Use sudo when running the install commands

Symptom: Test script throws cannot load such file

Fix: Make sure you have #!/usr/bin/env ruby shebang line

Symptom: Gem install fails – OpenSSL SSL_connect...

Fix: Update openssl – sudo apt update openssl

Monitoring your terminal output closely makes diagnosing issues much easier.

Google any specific errors not covered here – odds are someone has solved it already!

Now let‘s look at optimizing performance…

Squeezing Maximum Performance From Ruby

Once Ruby is up and running, there are some handy optimizations we can make:

1. Update Environment Variables

Ruby loads config from shell ENV vars. Useful ones:

export RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR=0.9  

export RUBY_GC_MALLOC_LIMIT_MAX=16000000

export RUBY_GC_MALLOC_LIMIT_GROWTH_FACTOR=1.1

2. Use JIT Compilers

Just-in-time compilers like MJIT boost runtime performance:

ruby --jit -S my_script.rb

3. Analyze Bottlenecks

Gems like derailed_benchmarks help identify slow code:

derailed bench:memory

4. Set up a Ruby Server

A dedicated Ruby server avoids app restarts. Try Puma:

gem install puma 

puma

There are plenty more tuning tips worth checking out!

Now let‘s step through building an app…

Building Your First Ruby Application

To apply your new Ruby skills, let‘s build a simple Twitter bot!

Our bot will:

  • Generate random inspirational quotes
  • Post tweets on a defined schedule
  • Reply to user mentions and hashtags

This combines Ruby‘s strengths for scripting, APIs and automation.

1. Install Packages

First, use gem to install packages:

gem install twitter boto3 ice_cube figaro

This grabs the:

  • Twitter API wrapper
  • AWS credential helper
  • Scheduling library
  • Environment variable loader

Next, generate a barebones project:

bundle init

And install the gems into a isolated bundle:

bundle install

This produces a Gemfile.lock for pinning gem versions.

2. Generate Credentials

Next, we need API credentials for twitter and AWS.

For Twitter, create a developer account. Register a new app and grab:

  • Consumer key
  • Consumer secret
  • Access token
  • Access secret

For AWS, head to the IAM console and generate a new access key ID and secret access key.

Store these securely in environment variables using Figaro:

bundle exec figaro install

This generates an application.yml file. Populate it with your credentials.

3. Coding the Bot Logic

With credentials set up, our bot:

  1. Loads quotes from a database
  2. Tweets a random one
  3. Waits
  4. Repeats

And will favorite/reply to tweets when mentioned.

I‘ll leave actually coding out the tweet logic to you as an exercise!

Study up on:

  • The Twitter gem for the API wrapper
  • How Bot frameworks like Roby work
  • Using IceCube schedules
  • Querying data from Postgres

Learning by doing is Ruby‘s greatest strength.

Once finished, run your bot:

ruby twitter_bot.rb

Setup automated deployment on Ubuntu using a process manager like Foreman for reliability.

Share Your Work!

With your first real-world Ruby app ready, I‘d love to see what you build!

Post your bots, frameworks, gems and other projects to Reddit or Hacker News to share what you learned.

See you there!

Frequently Asked Questions

Got burning questions about Ruby or Ubuntu? I‘ll tackle some common ones:

Q: What‘s better – RVM or rbenv?

A: As seen earlier, RVM and rbenv take different approaches but achieve similar version management goals. Some key contrasts:

Feature RVM rbenv
Installation Complex – compiler dependencies Simple – uses Git
Ruby Building Compiles Ruby from source Leverages your OS‘s compiler
Gemsets Full featured with isolates Basic built-in support
Config .rvmrc files Shell environment variables
Support Great documentation Less hand-holding

There‘s plenty of religious wars on which is better!

I‘d recommend RVM for advanced use cases with team development or debugging complex gems.

For learning and solo projects, rbenv is a faster path to productivity.

Q: Help! Ruby isn‘t recognized in my terminal session

A: Ah yes, the classic ruby: command not found issue bites many new developers!

First, double check that installation fully completed each step without errors.

Provided it did, the likely culprit is Ruby‘s install directory isn‘t on your shell‘s PATH:

  • For apt, run:
echo ‘export PATH="/usr/local/bin:$PATH"‘ >> ~/.bashrc
  • For RVM/rbenv, follow the init steps or re-source your shell profile

This appends the paths to find Ruby correctly.

Q: What are your top tips for mastering Ruby?

A: Here are my best hacks for leveling up your Ruby skills:

  • Always use a Rubocop linter in your editor for catching style issues early
  • Master Ruby idioms like map, inject, metaprogramming
  • Read Poignant Guide to Ruby for understanding the Ruby way
  • Contribute to open-source Ruby gems for better coding insight
  • Experiment with unusual techniques like method_missing and dynamic eval
  • Build lots of mini-apps to sharpen your debugging senses

And never be afraid to play!Ruby rewards creativity.

Still have questions? Ask them below!

Conclusion

We just went on quite a journey!

You now know:

  • How the amazing Ruby language took the world by storm
  • 3 methods for installing Ruby on Ubuntu 22.10 desktop
  • Common pitfalls and error fixes while setting up
  • Config tricks for better performance
  • Steps to develop your own Twitter bot app

Put your new skills to work and build the next viral Ruby web app!

If you found this guide helpful, share it with fellow developers who want to master Ruby on Linux.

Thanks so much for reading, and happy coding my friend!