<<<<<<<<<<<<<<<<< Ruby Scripting <<<<<<<<<<<<<<<<<<
1. save to HelloWorld.rb file
#!/usr/bin/ruby
# Hello world ruby program
puts "Hello World!";
2. run command to < ruby helloworld.rb >
3. mode change < chmod u+x HelloWorld.rb >
run command to < ruby helloworld.rb >
4. command interpreting command (no backtick )
< ruby -e ' puts "Hello World" ' >
5. an interactive command-line interpreter command
< irb >