Download the script from Github and edit the settings at the top of the file
$ python route53_to_linode.py
By default the script will import all DNS zones it finds in Route53 for the given API key, the target domains will be created in the Linode account associated with the API key given. The domains must not exist already or the script will fail.
It is possible to import only selected Route53 zones into Linode by changing the IMPORT_ZONES setting, see the script for further details.
You need to have a working python installation.
The script uses only standard libraries and a basic installation of any recent python version should work.