Crontab
– Configure CronJob
# crontab -e
A crontab file has five fields for specifying day , date and time followed by the command to be run at that interval.
* * * * * command to be executed - - - - - | | | | | | | | | +----- day of week (0 - 6) (Sunday=0) | | | +------- month (1 - 12) | | +--------- day of month (1 - 31) | +----------- hour (0 - 23) +------------- min (0 - 59)
- in the value field above means all legal values as in braces for that column.
You could use '0 1,13 * * * ?
‘which means for every 1AM and 1PM
0 1,13 * * * rm /var/www/*/somedir/index.php > /home/someuser/cronlogs/some.log 2> &1 where * can be replaced by different domain names.