bash script to echo wan ip

Question

The following bash script is expected to echo the current ip of the wan, instead of google "what is my ip".
Error:

./ipChange.txt: line 2: +short: command not found “??

#!/bin/bash
ip=dig +short myip.opendns.com @resolver1.opendns.com
echo “$ip”

Any idea how to fix it? Thx

See: How to set a variable equal to the output from a command in Bash? — Cyrus, Oct 30 '16 at 20:36

score 2 · Answer 1 · answered Oct 30 '16 at 20:33

2

I have an easier oneliner for you:

curl ipecho.net/plain

If you want it in a variable:

myIp=$(curl ipecho.net/plain)

answered Oct 30 '16 at 20:33

3

I think it's better to keep the OP's lightweight DNS-based approach instead of using a relatively more expensive HTTP request. – Celada Oct 30 '16 at 20:37

score 1 · Accepted Answer · answered Oct 30 '16 at 20:33

1

Replace

ip=dig +short myip.opendns.com @resolver1.opendns.com

by

ip=$(dig +short myip.opendns.com @resolver1.opendns.com)

answered Oct 30 '16 at 20:33

Cyrus

Note for completeness: this seems to be IPv4-specific – Celada Oct 30 '16 at 20:38

2 Answers2