speedtest_cli.py is just a Python script. Executing it doesn't require submitting any args and it doesn't provide a curses UI or something like that to get in the way of logging. So basically you could set up a cron job like this to log output to /var/log/messages or equivalent:
Code:
@daily /usr/bin/python /path/to/speedtest_cli.py 2>&1 | /usr/bin/logger -t "speedtest"
or if you want to log to a file of choice use 'logger -f /path/to filename' or replace '2>&1 | /usr/bin/logger -t "speedtest" ' with '2>&1>>/path/to filename' (do check log rotation).
