10.5. Controlling Users' Access to Cron

The Scheduled Cron Jobs module can also be used to control access to the crontab command by UNIX users at the command line. This can be useful if you allow untrusted users to log in to your system, and want to prevent some of them from setting up Cron jobs to run commands and take up CPU time when they are not logged in. Usually by default, all users have the ability to create Cron jobs, but you can change that by following these steps:

1.
At the bottom of the module's main page, click on the Control user access to cron jobs link. This will take you to a form for entering the usernames of users who can or cannot use Cron.

2.
To grant access to all users, select the Allow all users option.

To grant access to only some users, select the Allow only listed users option and enter their usernames into the text field.

To give access to all but a few users, select the Deny only listed users option and enter the usernames of the people to whom you want to deny access into the text field.

3.
When done, click the Save button.

If a user has been denied access to Cron, you will no longer be able to use the module to create, edit, or delete jobs belonging to him. Existing jobs, however, may continue to execute!

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