Digging to the final IP

Sam Wilson Sam.Wilson at ed.ac.uk
Thu Oct 23 14:17:49 UTC 2014

In article <mailman.1128.1414072988.26362.bind-users at lists.isc.org>,
 Bob Harold <rharolde at umich.edu> wrote:

> Anytime you see 'grep' and 'cut' used together, they can usually be
> shortened to just 'awk', which requires starting one less process.  And if
> this case it splits fields the way a users sees them, so the same code
> works in both cases:
> $ dig +noall +answer home.kreme.com in a | awk '/[\t ]A[\t ]/ {print $NF}'
> $ dig +noall +answer  dave.knig.ht in a | awk '/[\t ]A[\t ]/ {print $NF}'

$ dig +noall +answer cancer.ucs.ed.ac.uk | perl -ne ' /\sA\s/ && do { 
@_=split; print "$_[$#_]\n" }'


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