Use run rb runner bee to experiment with quickly prototype or just explore the ruby programming language.
Run ruby program online.
This tells the shell what type of file this is.
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To mark the file as executable run the command chmod x test rb.
Now to run the program simply enter the command test rb.
This will set a file permission bit indicating that the file is a program and that it can be run.
You can run your programs on the fly online and you can save and share them with others.