Crontab guru: When in doubt

When in doubt, use crontab . guru to check your cron syntax and don't forget to monitor your scheduled tasks for failures! Simple Test Here's a simple test to determine if your implementation of cron is affected by this issue. Add the following line to your crontab . " " "," " SUN touch /tmp/cron-does-not-have-this-bug Get started with 68 popular crontab expressionsThe quick and simple editor for cron schedule expressions by Cronitor. NAME crond - daemon to execute scheduled commands SYNOPSIS crond [-c | -h | -i | -n | -p | -P | -s | -m] crond -x [ext,sch,proc,pars,load,misc,test,bit ... NAME crontab - files used to schedule the execution of programs DESCRIPTION A crontab file contains instructions for the cron (8) daemon in the following simplified manner: "run this command at this time on this date". Each user can define their own crontab . Commands defined in any given crontab are executed under the user who owns that particular crontab . Uucp and News usually have their own crontabs, eliminating the need for explicitly running su (1) as part of a cron command. Blank lines ...