Cron jobs are timetabled tasks, which are executed on regular time intervals set by the end user and they execute scripts written in different programming languages - PHP, Perl, Bash, and so on. In accordance with what exactly a cron needs to do, it can run each and every minute, once a week or perhaps once a year. There are many effective applications to use cron jobs in your day-to-day management of a site. For example, a backup copy of the full website may be generated daily or maybe weekly or an e-mail with all of the fresh signups for the day can be delivered to a specific email address. These types of automatic options will make the management of every website faster and easier. There aren't any particular file types which are allowed or forbidden, so any script can be executed with a cron job.