Question

I have a file strings.txt containing 100 strings, each on a line

string1
string2
...
string100

For each of those strings, I want to find all the lines in file_to_look.txt that contain that string. Now, I could run grep 100 times like grep string1 file_to_look.txt, then grep string2 file_to_look.txt, etc., but that would take a lot of typing time for me.

Is there a way that I don’t have to do so much typing?

EDIT: Solutions that go through file_to_look.txt only 1 time instead of 100 times would be great, since my file_to_look.txt is quite large.

Answer 1

-f is for passing (GNU) grep a pattern file.

grep -f strings.txt file_to_look.txt