Say I have a text file with multiple lines, but I only want fgrep to list those lines which have certain words in the same line. So, for example, if I'm looking for the words "cat" and "dog", how would I supply that information to fgrep?
I understand for one argument it would simply be:
fgrep cat text.txt
but I want to look for lines that contain "dog" as well as "cat" in the same line. How would I go about doing this?
This will work:
fgrep cat text.txt | fgrep dog
You can also use one regex with grep -E, something like:
grep -E "cat.*?dog|dog.*?cat" text.txt
But it is typically too much of brainpower to spend for simple task like that, and I choose first method instead.