I have files that collect the information from search engines and store the results in mysql. I want this file to run everyday in background so it can generate reports for each day. I need files www.domain.com/file.php, www.domain.com/file2.php?url=ab.com www.domain.com/file3.php to run once every every day at 9am, 3pm and 7pm. How to run this file in background using cron jobs, I have cpanel, but i am getting confused to set there. I am totally new using cron jobs and linux commands. So please explain me whole procedure.