How can I enable a CRON job on my server that does not have Plesk?

Article taken from


The crontab (cron derives from chronos, Greek for time; tab stands for table) command, found in Unix and Unix-like operating systems, is used to schedule commands to be executed periodically. To see what crontabs are currently running on your system, you can open a terminal and run:

sudo crontab -l
To edit the list of cronjobs you can run:
sudo crontab -e
This wil open a the default editor. Cronjobs are written in the following format:
* * * * * /bin/execute/this/

Scheduling explained

As you can see there are 5 stars. The stars represent different date parts in the following order:

  1. minute (from 0 to 59)

  2. hour (from 0 to 23)

  3. day of month (from 1 to 31)

  4. month (from 1 to 12)

  5. day of week (from 0 to 6) (0=Sunday)

Execute every minute

If you leave the star, or asterisk, it means every. Maybe that's a bit unclear. Let's use the the previous example again:

* * * * * /bin/execute/this/

They are all still asterisks! So this means execute /bin/execute/this/

  1. every minute

  2. of every hour

  3. of every day of the month

  4. of every month

  5. and every day in the week.

In short: This script is being executed every minute. Without exception. Execute every Friday 1AM So if we want to schedule the script to run at 1AM every Friday, we would need the following cronjob:
0 1 * * 5 /bin/execute/this/

Get it? The script is now being executed when the system clock hits:

  1. minute: 0

  2. of hour: 1

  3. of day of month: * (every day of month)

  4. of month: * (every month)

  5. and weekday: 5 (=Friday)

Execute 10 minutes past every hour on the 1st of every month

Here's another one, just for practice:

10 * 1 * * /bin/execute/this/

It takes some getting used to, but it offers great flexibility.

This article has been provided by Codero Hosting, the leading provider of reliable dedicated, managed and cloud hosting services. Need more information on this topic or to learn more about Codero’s hosting services please visit www.codero.comchat with us online or give us a call at 866-2-CODERO. 



Posted in
Last update:
2015-12-03 20:39
Average rating:0 (0 Votes)