Below are more details regarding the Wget approach.
In the SugarOpenSource_AdminGuide_4.5.pdf I found the following:
2. No PHP binary found or it is broken.
Change the mechanism by which your cronjob calls Sugar's cron.php.
Determine if this is an option at this time by finding either “curl” or “wget” on your system. This is done with the commands “which curl” and “which wget”.
If you use cURL, your crontab entry should look as follows:
* * * * * curl --silent
http://yourdomain/yoursugarcrminstance/cron.php
If you use wget, your crontab entry should look like:
* * * * * wget -q
http://yourdomain/yoursugarcrminstance/cron.php
Note: Both curl and wget have numerous switches that do not always map to
different versions on different platforms. Experiment in the terminal until
you find the “perfect” line, and add it as the line for your crontab entry.
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