Change the working directory to the running file path. Just use chdir(dirname(__FILE__)); include_once ‘../your_file_name.php’; //we can use relative path after changing directory in the running file. Then you won’t need to change all the relative paths to absolute paths in every page.
* * * * * echo “hello” > /tmp/helloFile_$(date +\%Y\%m\%d\%H\%M\%S).txt You just need to escape the percent signs. Other date formats: http://www.cyberciti.biz/faq/linux-unix-formatting-dates-for-display/
The answer would be dependent on the variant/extension of cron you are using. Some variants do not handle the Daylight Saving Time, leading to missing jobs and twice run of the job. If you are using the Paul Vixie cron, then it does handle the DST changes. As per the cron man page: cron checks … Read more
You can see the date, time, user and command of previously executed cron jobs using: grep CRON /var/log/syslog This will show all cron jobs. If you only wanted to see jobs run by a certain user, you would use something like this: grep CRON.*\(root\) /var/log/syslog Note that cron logs at the start of a job … Read more
If the first command is required to be completed first, you should separate them with the && operator as you would in the shell. If the first fails, the second will not run.
I personally find it easier use MySQL event scheduler than cron. Enable it with SET GLOBAL event_scheduler = ON; and create an event like this: CREATE EVENT name_of_event ON SCHEDULE EVERY 1 DAY STARTS ‘2014-01-18 00:00:00′ DO DELETE FROM tbl_message WHERE DATEDIFF( NOW( ) , timestamp ) >=7; and that’s it. Read more about the … Read more
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) | … Read more
You can also do it without a temporary file: (crontab -l ; echo “0 4 * * * myscript”)| crontab –
According to “man 5 crontab” you can set environment variables in your crontab, by writing them before your cron lines. There is also an example of a crontab so you just have to copy/paste it : $ man 5 crontab | grep -C5 PATH | tail # and files in /etc/cron.d. These files also have … Read more
cron is the general name for the service that runs scheduled actions. crond is the name of the daemon that runs in the background and reads crontab files. A crontab is a file containing jobs in the format minute hour day-of-month month day-of-week command crontabs are normally stored by the system in /var/spool/<username>/crontab. These files … Read more