Delete lines based on patterns in another file

Question

I have two files:

input.txt:

Hi 1-12T2EDD
1-13D62L6Hello
1-15SDWAKWazzup
Wow1-18Z3QWY
         


        

Answer 1

A simple grep will do this:

$ grep -Fvf filter input
Hi 1-12T2EDD
1-13D62L6Hello
Wow1-18Z3QWY

Options:

• -F for fixed strings as we don't need regexp matching
• -v for inverse matching
• -f for specifing the file containing the strings to (inverse) match.