On Sun, 6 May 2001 at 12:55am (-0600), Remo Mattei wrote:
> Hi guys it's late and my mind is not working I guess. I have 2 files one
> which is static (firewall ipdeny) the other is dynamic portsentry
> therefore I will have ips that I want to copy to the ipdeny but I do
> not want the ip if already there, any suggestions.
>
If you do..
cat list1 list2 | sort | uniq > newlist
... then newlist will contain a merge of both lists with each ip address
listed only once. Alternativly...
comm -1 -3 list1 list2 > newips
... will give you newips that contains only the ips from list2 that did not
appear in list2. This assumes that list1 and list2 have both already been
sorted - comm and uniq both only function properly on sorted lists.
M.
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