Generate the crontab you need to schedule cron jobs on your server with the Coveloping Crontab Generator.
Cron is a process running on unix-based systems to check crontab (cron table) files and execute the commands they contain at specific dates and times or intervals. You can set up a cron job to execute a command from every minute to a specific date and time each year. Commonly it is used for web application background tasks, such as periodic database updates or taking a database backup.
Within a crontab file, each line represents a job to be executed at the scheduled time. A job line is made up of five parts to indicate when it should run, and then a command. Here's an example of a crontab job to execute a script every minute:
* * * * * /home/script.sh
The stars in order represent the minute, hour, day, month and weekday that a task should run, the stars can also be represented by numbers and a series of special characters. For example you can make a job run at exactly 5 minutes past every hour by just stating the number like so:
5 * * * * /home/script.sh
Alternatively intervals can be represented with a slash, so */5 would indicate the job should run every five minutes in the following example:
5/ * * * * /home/script.sh
Ranges can be indicated using a dash (-), and you can also use commas to separate a list.
To use the the crontab generator simply:
To add the crontab job to your server, connect via SSH to your server and use the command:
Paste the generated crontab onto a new line (make sure you press enter after the job to create a new line). Save and exit the file and your crontab job will run at the next allocated time. You do not need to restart the server for this to take affect.
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