Use awk sed command and while loop to remove entries from second file

Question

I have two output files:

1. FILE-A contains 70,000+ unique entries.
2. FILE-B contains a unique listing that I need to remove from FILE-B.

FILE-A:

 TOM
 JACK
 AILEY
 BORG
 ROSE
 ELI

FILE-B Content:

 TOM
 ELI

I want to remove anything listed in FILE-B from File-A.

FILE-C (Result file):

 JACK
 AILEY
 BORG
 ROSE

I assume I need a while r for i statement. Can someone help me with this? I need to cat and read FILE-A and for every line in FILE-B I need to remove that from FILE-A.

What command should I use?

Answer 1

You don't need either awk, sed, or a loop. You just need grep:

fgrep -vxf FILE-B FILE-A

Please note the use of -x to match entries exactly.

Output:

JACK
AILEY
BORG
ROSE

Answer 2

You can use grep -v -f:

grep -xFvf FILE-B FILE-A
ACK
AILEY
BORG
ROSE