Crontab ASCII Art example.

instead of the *, you may wish to use the following shortcut strings:

       string       meaning
       ------              -------
       @reboot       Run once, at startup.
       @yearly       Run once a year, "0 0 1 1 *".
       @annually       (sames as @yearly)
       @monthly       Run once a month, "0 0 1 * *".
       @weekly       Run once a week, "0 0 * * 0".
       @daily       Run once a day, "0 0 * * *".
       @midnight       (same as @daily)
       @hourly       Run once an hour, "0 * * * *".

Also, according to my experience, if you create a script named, say "", it simply won't work because of the .sh extension, so name your crontab scripts without the .sh extension (...and don't forget to shebang and chmod+x your scripts).

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Senior Professional Network and Computer Systems Engineer during work hours and father when home. Andrea strives to deliver outstanding customer service and heaps of love towards his family. In this Ad-sponsored space, Andrea shares his quest for "ultimate" IT knowledge, meticulously brought to you in an easy to read format.