I have a PHPBU job scheduled in my root crontab:

6 * * * * /etc/phpbu/phpbu.phar --configuration=/var/www/vhosts/example.com/backups/example.com-phpbu-config-hourly.xml

If I sudo the command (minus the 6 * * * * as a sudo-able user, the task runs, performs a backup, and exits as expected, no errors. The config is valid, the phpbu.phar file is root:root with 775.

When the crontab fires (6 minutes past the hour), nothing happens. If I update the crontab entry to append to a text file…:

6 * * * * /etc/phpbu/phpbu.phar --configuration=/var/www/vhosts/example.com/backups/example.com-phpbu-config-hourly.xml >>/tmp/phpbu-crontab.txt

…a zero byte file is created. If I top and tail with something to test if root crontab is running, and make the .phar run more often…:

* * * * * touch /tmp/hello
* * * * * /etc/phpbu/phpbu.phar --configuration=/var/www/vhosts/example.com/backups/example.com-phpbu-config-hourly.xml >>/tmp/phpbu-crontab.txt
* * * * * touch /tmp/goodbye

…I get /tmp/hello, /tmp/goodbye with an updated timestamp every minute (expected) and nothing in /tmp/phpbu-crontab.txt at all. No errors.

I am stumped. I would be very grateful for some pointers or additional things to check.

Thank you in advance for any advice or feedback.


OK, solved. I needed to prepend the PHP-CLI:

* * * * * /path/to/php-cli /etc/phpbu/phpbu.phar --configuration=/var/www/vhosts/example.com/backups/example.com-phpbu-config-hourly.xml

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