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crontab guru

14/04/2026 • cron, Linux, sysadmin

How to Run Bash Script as Root During Startup on Linux

13/12/2021 • cron, crontab, sysadmin

…start off by writing “@reboot.” The reboot command is key here as it tells the cron on reboot this command to run every single time. Directly after reboot, add the full file path to the bash script.

@reboot /home/derrik/startupscript.sh

crontab guru. The quick and simple editor for cron schedule expressions

21/06/2021 • cron, Linux, sysadmin

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Scheduling WP Cron Events

09/10/2018 • cron, wordpress, wp-cron

Running WP Cron on multisite the right way

24/05/2018 • cron, desarrollo web, wordpress, Wordpress Multisite, WP-CLI, wp-cron

I think the best way is to use WP-CLI but you’d need to write a bash script to do this.

How to fix all of your crontab related woes/problems (Linux)

19/02/2018 • cron, crontab, Linux

Every user on a system may have their own crontab file. The location of the root and user crontab files are system dependant but they are generally below /var/spool/cron.

There is a system-wide /etc/crontab file, the /etc/cron.d directory may contain crontab fragments which are also read and actioned by cron. Some Linux distributions (eg, Red Hat) also have /etc/cron.{hourly,daily,weekly,monthly} which are directories, scripts inside which will be executed every hour/day/week/month, with root privilege.