regex - How to make "grep" read patterns from a file?

Question

Suppose there is a large text file and I would like to print only the lines that do not match some patterns. Obviously, I can use egrep -v 'patter1|pattern2|pattern3. Now what if all those patterns are in a text file ? What is the best way to make egrep read patterns from the file ?

Answer 1

grep -v -f pattern_file