I'm new to Ruby. I installed Rails on Windows 8.
When I type mkdir in IRB, I'm getting this. I tried running the IRB as
administrator too, and still get the same result
irb(main):001:0> mkdir lesson2
NameError: undefined local variable or method `lesson2' for main:Object
from (irb):1
from C:/RailsInstaller/Ruby1.9.3/bin/irb:12:in `<main>'
irb(main):002:0> cd lesson
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