20
> bitcoin-cli listtransactions "*" 20 100

As a json rpc call
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "listtransactions", "params": ["*", 20, 100] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/


