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 :: Mailing Lists

[ILUG] tip of the day, piping data.

[ILUG] tip of the day, piping data.

Lars Hecking lhecking at nmrc.ucc.ie
Wed Nov 24 15:16:39 GMT 1999


Donncha O Caoimh writes:
> Last week I had to sort a list of several thousand email addresses in a
> file, and then break  the file into manageable chunks.
> To do it I decided to rely on some basic Unix commands present in Linux:
> cat, sort and split.
> 
> Anyway, here's the little bit of code. It demonstrates the power of the
> Unix command line by piping one command into another into another again:
> 
> cat list.txt | sort -f -t @ -k 2 | split -l 500 - list

 Today's winner of the "Useless Use of cat" award ...

> It's possible to shorten the above commands but I prefer to have it
> slightly more human readable!

 Yeah, that's what they all say :)





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