I come up with a solution to this problem,write a piece of script call readme who internal call the less with the current directory readme-alike txt file.
Is there any software to do so?
I do not want to reinvent the wheel.
Do you mean you want to not have to know the filename specifically to open any given, case-insensitive 'readme' files?
Something like this perhaps (but it will fail on filenames with spaces):
From @~Quack's comment, if you want to handle spaces, too: