Restarting cron after changing crontab file?

Question

Do I have to restart the cron after changing the crontable file?

Answer 1

No.

From the cron man page:

cron will examine the modification time on all the crontabs and reload those which have changed. cron need not be restarted whenever the crontab file is modified

But if you just want to make sure it's done anyway,

sudo service cron reload

or

/etc/init.d/cron reload

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