[Gllug] problems with comm

[Jackson, Harry]

> -----Original Message-----
> From: Steve Cobrin [mailto:cobrin at highbury.net]
> Sent: 18 February 2002 16:05
> To: gllug at linux.co.uk
> Subject: [Gllug] problems with comm
> 
> 
> I'm scratching my head here. Can anybody help?
> 
> I have two files containing lists of sorted numbers one per 
> line. I want to 
> find out what numbers are defined in one file rather than the 
> other. I'm 
> using "comm", but it *seems* to be giving me the wrong 
> result, in fact it 
> shouldn't return anything, but it does!
> 
> Can anybody help? 
> [I'm more interested in what I'm misinterpreting from comm, 
> as opposed to a 
> solution in Perl.]

The comm command produces three columns according to the manpage and I think
they overlap. Have you tried 

% comm -1 access.passgid access.grpgid
% comm -2 access.passgid access.grpgid
% comm -3 access.passgid access.grpgid

Harry


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