Using
crontab is the way to go. There isn't anything
deep voodoo about cron. The crontab information is indeed
stored in a file, but that doesn't mean adding something
to the file is going to work. On many OSses, nothing will
happen. You would usually have to use the
crontab
command, either interactively (using an editor), or by
passing it a complete file. The
crontab command checks
the file for syntax errors, and then tells the
cron
daemon there's a new configuration file.
You can automate that process, but details of how to do that
differ between OSses. Personally, I think setup scripts that
modify configuration information (like crontab entries) are
a big no-no. If people cannot figure how to add a line
(you can give them the line they need to add) to their crontab,
they shouldn't run automated processes.
Abigail
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