Unix Cron & WordPress

Creëer voor elke WordPress-site een cron job for user 'www-data

Syntaxis

Timefields:

Minute   Hour   Day of month   Month   Day of week        Opmerkingen
0-59     0-23   1-31           1-12    0-6 (0 = Sunday)   Mogelijke waardes
------   ----   ------------   -----   ----------------   -----------
0          16           1,15       *                  *   Do something on day 1 & 15 at 16:00
*/10        *              *       *                  *   Do something every 10 minutes

Voorbeelden:

0 16 1,15 * * echo Timesheets Due > /dev/console   # 
*/10 * * * *

Basics

$ crontab -l
no crontab for jeroen

$ crontab -l -u www-data
must be privileged to use -u

$ sudo crontab -l -u www-data
no crontab for www-data

Bronnen

• https://docs.wp-rocket.me/article/1279-cron-and-wp-rocket
• https://stackoverflow.com/questions/46442933/create-cronjob-ubuntu-for-user-www-data-using-bash#46443063
• https://docs.oracle.com/cd/E19455-01/805-7229/sysrescron-62861/index.html
• https://crontab.guru/every-10-minutes
• https://www.cyberciti.biz/faq/crontab-every-10-min/