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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
Colin Law
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Jun 21, 2013, 10:49:39 AM6/21/13
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Those commands (mkdir and cd) are not supposed to be run in irb (which
is for ruby code), but in a console window. Whether they work in
Windows anyway I do not know. I strongly advise not to use Windows
for developing RoR applications, it is much easier in Linux (Ubuntu
for example) or Mac.