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====== Bash: get public IP ======

If you are behind a router you can't use ifconfig to find the public IP, but the problem can be solved easily beacause the IP can be obtained from remote servers such as

http://ifconfig.me/ip
http://icanhazip.com
http://ipecho.net/plain

You only have to choose that with quicker response time. You could even create your own webpage using PHP and
<code>echo $_SERVER['REMOTE_ADDR']</code>
This way you can avoid third party services.

At this point, in the linux shell or bash script you can use curl or a more common wget that's preinstalled on basically every distro of the planet.
E.g.
<code>wget -qO- icanhazip.com</code>
or
<code>curl icanhazip.com</code>

This can be useful in many ways... e.g., to make a bash script for dynamic DNS update.

<WRAP center round tip 60%>
See also [[linux:bash:dtdns-ip-update-client]]
</WRAP>