Seperating STDOUT and STDERR

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Consider the follwing situation: 

ls * i-am-not-here-for-sure

* indicates all the files in the current folder. Let's assume that you don't have a file named i-am-not-here-for-sure (that is unless you are crazy!), then the first argument of ls function generates a list of files and directories as output. Second one generates an error: 

good



bad
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