Task Scheduler Usage Examples

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CRON - it is also a task scheduler - allows you to perform various actions at the right interval: run scripts on the site, execute standard commands in Linux, and run bash scripts.

To run a regular command in the scheduler, you need to add a line like this:

mv /var/www/USERNAME/data/today.php /var/www/USERNAME/data/yesterday.php

This command will rename the today.php file to yesterday.php

To run a bash / sh script, we prescribe the interpreter and the path to the script itself:

sh /var/www/USERNAME/data/mv.sh

The contents of the script can be almost anything - it can be a database backup, cleaning up temporary directories, moving files, etc. To make sure that the script works, you can limit yourself to a banal renaming, as in the first example:

mv /var/www/USERNAME/data/yesterday.php /var/www/USERNAME/data/tomorrow.php

PHP scripts can be run either by writing the path to the interpreter or via wget. Let's look at both examples.

  • To run via wget, specify the following:
    /usr/bin/wget -O - -q -t 1 http://site.domain/script.php
    The first part is the path to wget and the necessary parameters, the second is the url of the script being executed.
  • To run using the interpreter, use:
    /usr/bin/php -f /var/www/USERNAME/data/www/site.domain/script.php

In other words, in the first option, the path to the interpreter is used, and in the second, the path to the script, only in this case not as a URL, but as a full path.

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