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Prevent duplicate cron jobs running
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PHP function that receive a cron string and return the next run timestamp
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How to set a cron job to run a shell script?
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Why does cron silently fail to run sudo stuff in my script?
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Running only one Perl script instance by cron
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Is there a best way to avoid execution of process more than once in Oracle?
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How can I set cron to run certain commands every one and a half hours?
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Unauthorized access to cron
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How to set cron job for every 5 hours
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PHP and concurrent file access
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Cannot run a GUI app from cron
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Stop crontab from filling syslog Ubuntu 15.04
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Create cron jobs to repeat every X units of time starting on an arbitary unit
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how can I make cron run a job right now, for testing/debugging? without changing the schedule!
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Java Quartz scheduled Job - disallow concurrent execution of Job
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Timed Tasks (cron-like) in PHP