sorry about that:

@command=`aws ec2 describe-instances --filters "Name=instance-state-na
+me,Values=running" | grep  PrivateDnsName | cut -d ":" -f2| cut -d '"
+' -f2 | sort -u `;
[download]

Sample Results in @command:

ip-10-1-129-212.us-west-2.compute.internal
ip-10-1-129-168.us-west-2.compute.internal
ip-10-1-129-212.us-west-2.compute.internal
ip-10-1-129-158.us-west-2.compute.internal
ip-10-1-129-78.us-west-2.compute.internal
ip-10-1-1-145.us-west-2.compute.internal
ip-10-1-65-215.us-west-2.compute.internal
ip-10-1-129-194.us-west-2.compute.internal
ip-10-1-1-252.us-west-2.compute.internal
ip-10-1-67-133.us-west-2.compute.internal
[download]

My issue is that it keeps on printing "not found" even when the ip address is in the file