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Re: dig: single line



On Thu, 12 Mar 2009 00:35:03 +0000, Mike -- EMAIL IGNORED wrote:

> On Wed, 11 Mar 2009 19:46:53 -0430, Patrick O'Callaghan wrote:
> 
>> On Thu, 2009-03-12 at 00:13 +0000, Mike -- EMAIL IGNORED wrote:
>>> On Wed, 11 Mar 2009 19:31:34 -0430, Patrick O'Callaghan wrote:
>>> 
>>> > On Wed, 2009-03-11 at 23:32 +0000, Mike -- EMAIL IGNORED wrote:
>>> >> The head suggestion won't work, because in the above example, it is
>>> >> the second line I want.
>>> > 
>>> > A trivial excercise for old Shell hands, e.g.
>>> > 
>>> >         program | head -n 2 | tail -n 1
>>> > 
>>> > or
>>> > 
>>> >         program | sed -n 2p
>>> > 
>>> > poc
>>> 
>>> Yes, but the dig command sometimes returns the result on the first
>>> line, and sometimes on the second, so it is necessary to test what you
>>> get.
>> 
>> You haven't so far said which of the lines you are interested in.
>> Perhaps you can use grep on a pattern.
>> 
>> poc
> 
> How about:
> 
>    grep "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]"
> 
> ?
> Can it be done more concisely?  Still, one of the numbers might exceed
> 255 ... unlikely.
> 
> Mike.

I forgot the final + .

Mike.


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