micrond executes commands periodically as directed by one or
more crontabs. See Crontabs, for a discussion of crontab
locations and format.
Normally, a cron job is not run if its previous instance is still
running. For instance, if a cron job scheduled to run each minute
takes three minutes to finish, it will be actually run once in three
minutes. This behavior can be altered by setting the
_MICRON_MAXINSTANCES variable to the desired number of cron job
instances that can be run simultaneously (use
to change the setting for one job only, see _MICRON_MAXINSTANCES).
Depending on the cronjob settings, any data the running job produces on its standard output and standard error can be logged via syslog in real time, or captured and, upon termination of the job, mailed to the job owner or appended to a file (see Cronjob Output).
On GNU/Linux systems,
micrond monitors each opened crontab
for modifications and re-reads it as soon as it is written to disk.
On other systems, it checks crontab modification times each minute and
re-reads those crontabs for which this value has changed.
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