Thank You for Your time and answer and a tip, Tzafrir:

> You can grep for the exact info. but better first just grep-out
> comments and empty lines.
> 
> $ wc /etc/postfix/main.cf
>   40  143 1312 /etc/postfix/main.cf
> $ egrep -v '^(#|$)' /etc/postfix/main.cf | wc
>      20      63     786

But I already simply did:

grep -v '#' /etc/postfix/main.cf


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