Dear Rajak ,

Can you chechk if egrep is available in uour *NIX flavor ?

Code:

which egrep

I have tested the below commandline in my RHEL and DEBIAN box .

Code:

egrep -v $(cat file2.csv | tr '\n' '|' | sed 's/.$//') file1.csv

Otherwise Agama's approach is the easiest , and you can use that .