All pad-specific settings are loaded from a file called "padinfo.json" -- by default etherdump looks in the current directory. Make a copy of padinfo.sample.json to start one. Make sure to check that the URL and port settings are correct, and to paste the correct apikey here!
Example
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mkdir mydump
cd myddump
etherdump init
The program then interactively asks some questions:
cp padinfo.sample.json ~/yourfolder/padinfo.json
nano padinfo.json
Please type the URL of the etherpad:
http://automatist.local:9001/
The APIKEY is the contents of the file APIKEY.txt in the etherpad folder