Monday, 26 August 2013

Is the '-f' option of Linux shell sort useful?

Is the '-f' option of Linux shell sort useful?

The man specification says the meaning of '-f' is " fold lower case to
upper case characters",but isn't the lower case less than upper case? So,
if I want to sort 'a' and 'A',is it necessary to add '-f'?
Could someone can give me a example which uses '-f'?

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