Rory Campbell-Lange wrote: > On 22/06/06, Marc Perkel ([EMAIL PROTECTED]) 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. > > join -v1 A B > C > I nominate this entire thread, best of 2006 ;)
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