Debug cron job in minimal environment

script.sh

# Sometimes cron jobs don't execute properly. It's hard to debug because
# the job may execute just fine if you run it manually in your shell. 
# That's because cron jobs run in a minimal shell by default.

# This will run the script in a minimal environment:
env - /path/to/script.sh

# Spoiler alert: Usually, the solution is to define the shell in the script,
# by prepending #!/bin/bash.