grep output to show only matching file

What is the option for grep开发者_如何转开发 that will allow me only to print the matching file and not the line within a file that matches the criteria?

grep -l 

(That's a lowercase L)

You can use the Unix-style -l switch – typically terse and cryptic – or the equivalent --files-with-matches – longer and more readable.

The output of grep --help is not easy to read, but it's there:

-l, --files-with-matches  print only names of FILEs containing matches

-l (that's a lower-case L).

Also remember one thing. Very important
You have to specify the command something like this to be more precise
grep -l "pattern" *