[Novalug] Finding similarities in files

[Ken Kauffman]

sort + diff?

K

On Fri, Sep 5, 2008 at 15:26, Jon LaBadie <novalugml at jgcomp.com> wrote:

> On Fri, Sep 05, 2008 at 12:46:12PM -0400, James Ewing Cottrell 3rd wrote:
> > man comm
> >
> > Great command. Ancient. Learn it!
> >
> > JIM
> >
> > Jon Taimanglo wrote:
> > > I know this is probably an easy one, but I have 2 files of IP's.  I
> > > want to find which IP's are in both files and print that out to
> > > another file.  Anyone have any ideas?
> > >
>
> comm will not be a good choice here as it compares by
> collating sequence, not numeric.  So all IP octets
> would have to be the same length for comm to work
> as desired.
>
> Another alternative
>
> sort -n f1 f2 | uniq -d
>
> You may have to check if the sort works properly without
> specifying fields.  If not you may need a sort like
>
> sort -t. -k 1,1 -k 2,2 -k 3,3 -k 4,4 f1 f2 | uniq -d
>
> Jon
> --
> Jon H. LaBadie                  jon at jgcomp.com
>  JG Computing
>  12027 Creekbend Drive          (703) 787-0884
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