write a command whose modification time is changed in min
 

find . -cmin 15
itis not working
find the name of the file that is changed brfore 15 mins

Options like -cmin take a numeric arg, together with an optional + or -
Simply specifying a number, like

-cmin 15

means find files exactly 15 minutes old.
To find files more than 15 minutes old, use

-cmin +15

and less than 15,

-cmin -15