Assign output to variable in Bash

Question

I\'m trying to assign the output of cURL into a variable like so:

#!/bin/sh
$IP=`curl automation.whatismyip.com/n09230945.asp`
echo $IP
sed s/IP/$IP/ nsupdat         


        

Answer 1

Same with something more complex...getting the ec2 instance region from within the instance.

INSTANCE_REGION=$(curl -s 'http://169.254.169.254/latest/dynamic/instance-identity/document' | python -c "import sys, json; print json.load(sys.stdin)['region']")

echo $INSTANCE_REGION

Answer 2

In shell, you don't put a $ in front of a variable you're assigning. You only use $IP when you're referring to the variable.

#!/bin/bash

IP=$(curl automation.whatismyip.com/n09230945.asp)

echo "$IP"

sed "s/IP/$IP/" nsupdate.txt | nsupdate