# ruby > Ruby programming language interpreter. > See also: `gem`, `bundler`, `rake`, `irb`. > More information: . - Execute a Ruby script: `ruby {{script.rb}}` - Execute a single Ruby command in the command-line: `ruby -e {{command}}` - Check for syntax errors on a given Ruby script: `ruby -c {{script.rb}}` - Start the built-in HTTP server on port 8080 in the current directory: `ruby -run -e httpd` - Show the version of Ruby you are using: `ruby -v`