Ruby is a dynamic, open-source programming language focused on simplicity and productivity. It has an elegant syntax that is easy to read and write. Ruby supports multiple programming paradigms, including object-oriented, functional, and procedural programming. With its vast ecosystem of gems (libraries), Ruby is widely used for web development, automation, and scripting.

Features of Ruby:

• Dynamic and flexible object-oriented language.
• Simple and readable syntax for ease of development.
• Support for multiple programming paradigms.
• Large collection of gems for extended functionality.
• Built-in support for automation, scripting, and DevOps tasks.
• Popular for web development with the Ruby on Rails framework.

To check the installed Ruby version, run:
# ruby -v

Disclaimer: Ruby is an open-source programming language released under the BSD and MIT licenses. It is provided "as is" without any warranty. Users are responsible for understanding and complying with licensing terms while using Ruby.