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tech:linux:dns_validate [2015/04/09 06:46] (current)
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 +====== Validate DNS with nslookup ======
 +To validate that the correct DNS entries are in the DNS
 +
 +**Validate script** (nsvalidate)
 +<code bash>
 +#!/bin/bash
 +HOSTN=$1
 +HOSTI=$2
 +RHOST=`nslookup -type=A $HOSTN|grep Address|grep -v "#​53$"​|cut -d" " -f2`
 +if [ $HOSTI != $RHOST ]; then
 +  echo "​Mismatch:​ $HOSTN expected $HOSTI but returned $RHOST"​
 +fi
 +</​code>​
 +
 +**Run script**
 +<code bash>
 +#!/bin/bash
 +./​nsvalidate someserver1 111.111.111.111
 +./​nsvalidate someserver2 222.222.222.222
 +</​code>​
  

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