crontab
Start a program after reboot using cronjob
Running wp-cron with cronjob
Cronjob for Magento 1.9
set vi as default cronjob editor
Cron Job fails with Error Message “(getpwnam() failed): No such file or directory”
Cronjob Timing
* * * * * = every minute */5 * * * * = every 5 minute 0 * * * * = every hour 0 * * * * = every day at 00:00 hour. 0 0 * * 0 = every Sunday at 0 minutes, 0 hour.
Here is how it works.
# Example of job definition: # .---------------- minute (0 - 59) # | .------------- hour (0 - 23) # | | .---------- day of month (1 - 31) # | | | .------- month (1 - 12) OR jan,feb,mar,apr ... # | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat # | | | | | # * * * * * user-name command to be executed
Disable cronjob output
To disable cronjob output, add the following to the end of the script
> /dev/null 2>&1
or
1> /dev/null 2> /dev/null
Save cronjob result to file
To save the result of a cronjob to a file, use
20 5 * * * /bin/bash /usr/serverok/mysqldb-backup.sh > /var/log/mysqldb-backup.log 2>&1
List all cronjobs
To list all cronjob, run
crontab -l
To edit all cronjobs, run
crontab -e