It does not seem to be executing my scripts every interval they're supposed to execute. What's more is that they seem to rarely be executing. Each script accesses my database, does some manipulation of the data, then stores it in a json file somewhere else on the server. I can tell that the scripts aren't executing nearly as often as they should be because my json file modify dates/times don't update nearly enough. More importantly though, my sql database backup command is simply not executing at all. What's interesting, however, is that if i run the command via SSH it works just fine, ie.:
The ones that say "php php" probably wouldn't work for that reason.
Try also editing the crontab with "crontab -e" from the command line. When you exit and save, it should perform superficial checks on the schedule definitions.
Okay, it looks like replacing the relative paths to my json files in all of my scripts with an absolute path fixed the issue. the only remaining issue is the command to backup my sql db for which i receive the following error via mail (thanks to Spray):