Re: [exim] bash or perl question

Chris Meadors wrote:
> Marc Perkel wrote:
>
>> There are probably people out there who just know how to do this in a
>> simple way.
>>
>> I have two files. Both files are text files that have IP addresses on
>> separate lines. Both are alphabetical. What I want to do is read file A
>> and file B and create file C that has all the IP addresses in file A
>> that do not match the addresses in file B.
>>
>> Trying a new spam processing trick creating a whitelist of every IP
>> address where I got 10 or more hams and no spams. That way I can just
>> have a host whitelist that I don't have to run through spamassassin.
>>
>
> Is file B a true sub-set of file A? That is it does not contain any
> addresses that are not also in A? And does each address only appear
> once in each file? If both of those are true, this will work:
>
> cat fileA fileB | sort | uniq -u > fileC
>

Unfirtunately no. file B has addresses mot in file A.