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I want to make many tasks(different shell script) run with crontab by clicking on a button on website to start all tasks specified in crontab. Is it possible to do this? Please provide me the recommendation.

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    You can run shell scripts by triggering them via web server. However, this has nothing to do with crontab which is a technique for running scripts triggered by time only. Commented Jan 16, 2020 at 22:59
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    you could have crontab run a script that checks if the button was clicked Commented Jan 16, 2020 at 23:03
  • @Ned64 can you then tell us please how to run such a shell script via the web browser please. Commented Aug 28, 2021 at 6:37
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    @MoisésBriseñoEstrello I would suggest somethink like the answer by Yevhen Stasiv below. One could either have php execute something server-side, or have it "drop" a flag file which would then be detected by a local script (more flexibility and security, avoiding exec). Commented Sep 14, 2021 at 11:36

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As you are looking for an 'on demand' click of the button script execution, you do not need to use crontab.

You can simply use something like PHP's shell_exec() or exec() to achieve your goal.

If you wish to execute previously set up crons on demand, something like run-parts /etc/cron.daily can be passed to the above functions.

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    This is exactly what I was looking for, the exec() function worked perfectly, thank you! Commented Aug 3, 2020 at 17:57

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