How can I get my external IP address in bash?

curl -s http://whatismyip.org/

wget -O - -q http://whatismyip.org/

You can use ifconfig.me as alternative to whatismyip.org.

curl -s http://ifconfig.me

Also ifconfig.me has some additional functional. To find out what else information you can receive visit the website.

netcat icanhazip.com 80 <<< $'GET / HTTP/1.0\nHost: icanhazip.com\n\n' | tail -n1

If you want to use HTTPS to avoid some potential pitfalls:

_result=$(wget -qO- https://ipcheckit.com/)
_result="${_result##*Your IP address is<br><b>}"
printf '%s\n' "${_result%%</b></p>*}"

Here is another alternative that depends on hosts who's business resolves around managing dynamic IP rather that "public service" sites that may go away or change format.

1) Register your server at one of the many free dynamic dns services (e.g. no-ip.com) This will give you a DNS entry like xxx.no-ip.org.

2) Install the service's dynamic update tool (reports IP changes to service).

To get the IP address in a script, just do:

$external_ip = `dig +short xxx.no-ip.org`

Great for use in cron job to check if dynamic IP has changed and some configuration entries need to be changed.

You also may use for this:

curl -s getip.tk

or

wget -O - -q getip.tk

Also it's can print User-Agent: getip.tk/agent or force print IP (for browsers): getip.tk/ip

I prefer to use this:

curl curlmyip.com

It's short and simple to remember.

Another way to view your external IP address is as follows:

curl -s http://www.ip-details.com | grep -Eo "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+"