What is up with [A-Z] meaning [A-Za-z]?

Question

I\'ve noticed for a while now that, on some of the Unix-based systems I use at least, ls [A-Z]* has been giving me the results I would anticipate from ls [A-Z

Answer 1

It depends on your locale. If you want that [A..Z] only matches capital letters, you could use C locale: set LC_COLLATE or LC_ALL to C.

LC_ALL=C
ls [A..Z]*

bash manual, pattern matching