Re: How to filter the contents of two text files.

2006-08-08 Thread David Robillard

Some little help is needed here ...

I have two text files, each has just a single column of data

FileA has 2798 entries, while FileB has 4242 entries; There are
entries in FileA that are also in FileB...

I'd like to filter against the two files, so I only get those entries
in FileB that don't occur only in FileA 


There are a couple of commands to do exactly what you want.

comm(1) -- select or reject lines common to two files
http://www.freebsd.org/cgi/man.cgi?query=comm&apropos=0&sektion=0&manpath=FreeBSD+6.1-RELEASE&format=html

diff(1) -- find differences between two files
http://www.freebsd.org/cgi/man.cgi?query=diff&apropos=0&sektion=0&manpath=FreeBSD+6.1-RELEASE&format=html

sort(1) -- sort lines of text files
http://www.freebsd.org/cgi/man.cgi?query=sort&apropos=0&sektion=0&manpath=FreeBSD+6.1-RELEASE&format=html

Enjoy!

DA+
--
David Robillard
UNIX systems administrator & Oracle DBA
CISSP, RHCE & Sun Certified Security Administrator
Montreal: +1 514 966 0122
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Re: How to filter the contents of two text files ..

2006-08-07 Thread Charles Swiger

On Aug 7, 2006, at 3:40 PM, Odhiambo Washington wrote:

I have two text files, each has just a single column of data

FileA has 2798 entries, while FileB has 4242 entries;
There are entries in FileA that are also in FileB...

I'd like to filter against the two files, so I only get those  
entries in FileB

that don't occur only in FileA 


See "man comm"; also note that you will have to sort the contents of  
files first.


--
-Chuck

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Re: How to filter the contents of two text files ..

2006-08-07 Thread Dan Nelson
In the last episode (Aug 07), Odhiambo Washington said:
> Some little help is needed here ...
> 
> I have two text files, each has just a single column of data
> 
> FileA has 2798 entries, while FileB has 4242 entries; There are
> entries in FileA that are also in FileB...
> 
> I'd like to filter against the two files, so I only get those entries
> in FileB that don't occur only in FileA 

If your files are sorted, you can use the 'comm' command.

-- 
Dan Nelson
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