Regular Expression Case Sensitivity

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Author: Simper, Brian D
Date:  
Subject: Regular Expression Case Sensitivity
Try this in an empty directory and let me know if this is a bug or a feature
or an error on my part.

Create several files of upper and lower case names:

    touch aaaa
    touch AAAA
    touch bbbb
    touch BBBB
    touch 1234
    touch .abcd


Now use a regular expression to delete all files starting with a lower case
letter:

    rm [a-z]*


When I was experimenting with this all of the files starting with *any*
alphabetic character were deleted. This was unexpected and I'm not sure if
I am misinterpreting the regular expression or if I am delusional. Let me
know what you get. FYI, I am using Red Hat Linux 7.2 so I would be
interested if it's just me.

Brian