RHCSA v8 Practice Session: Schedule tasks using at and cron – Part 1

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RHCSA practice session the objective "schedule tasks using at and cron." This part will focus on at and cron, and the second part will focus on anacron.

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  1. Eddie Jennings
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  3. linux admin
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if both 'day of month' and 'day of week' are specified, only one of those has to be true for the job to run, not both. From the crontab(5) man page:

Note: The day of a command's execution can be specified in the following two fields — 'day of month', and 'day of week'. If both fields are restricted (i.e., do not contain the
"*" character), the command will be run when either field matches the current time. For example,
"30 4 1, 15 * 5" would cause a command to be run at 4:30 am on the 1st and 15th of each month, plus every Friday.

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