dig: single line
Mike -- EMAIL IGNORED
m_d_berger_1900 at yahoo.com
Thu Mar 12 00:35:03 UTC 2009
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.
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