Shell script to fetch public ip address and update Amazon Rout53 DNS. Used on my Raspberry pi. Requires dnsutils and [cli53](https://github.com/barnybug/cli53). If run from crontab you might need to include the full path to cli53 in line 30. Just type `which cli53` to get full path.
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Based on the script by  [Tim Montague](http://timmontague.com/blog/2012/07/10/dynamic-dns-on-route-53/)