Find all files matching 'name' on linux system, and search with them for 'text'

Question

I need to find all instances of \'filename.ext\' on a linux system and see which ones contain the text \'lookingfor\'.

Is there a set of linux command line operation

Answer 1

A more simple one would be,

find / -type f -name filename.ext -print0 | xargs -0 grep  'lookingfor'

-print0 to find & 0 to xargs would mitigate the issue of large number of files in a single directory.