I've been told that the crontab file should not contain "commands." I believe they were referring to binaries versus batch; the implication being that batch files (i.e., scripts) are preferable. I am aware of no such restriction. I know that for some commands there are both transient (binary files) and shell built-ins (i.e., compiled into the shell). Regardless, I've never seen cron complain. What am I missing?