print a line when NOT in a file

[ghostdog74]

Originally Posted by TonyLawrence

And yet another way which, depending upon what you are doing next, may or may not be more convenient:

for i in `cat list1.txt`; do grep -q $i paragraph.txt || echo $i; done

or

for i in `cat list1.txt`; do grep -iq $i paragraphs.txt || echo $i; done

that's expensive operation, calling grep for each line in list1.txt. use grep's -f option when possible