FaJo.de

This module implements a CRON daemon for use by administrators and other modules to periodically run jobs on the NAS. To simplify job management and to be more flexible this module uses a combination of CRON and Anacron to provide different ways to inject jobs.

Cron is a time-based job scheduler in Unix-like computer operating systems. Cron enables users to schedule jobs (commands or shell scripts) to run periodically at certain times or dates. It is commonly used to automate system maintenance or administration, though its general-purpose nature means that it can be used for other purposes

Supported Models

This module should work for the following models:

Installation

Extract the module binary package (.mod) from the archive and install it.

Binary releases

cronie : 1.4.8 (from the Fedora Project)

Configuration

After enabling the module the module status and configuration page can be accessed. This page allows to manage cron jobs and restart the cron daemon (crond) and to reset the configuration and jobs to their defaults.

Through the modules web interface administrators can create cron jobs using the usual crontab file format. Each line consists of 7 fields separated by spaces:

1. minute
2. hour
3. day of month
4. month
5. day of week
6. username
7. command and arguments

The modules cron daemon supports the extended crontab format. A detailed documentation on the format is available on the module configuration page.

Module developers can maintain their own per module crontab files that follow the same syntax. These crontab file should be placed into the directory

/raid/data/module/FaJoCron/system/etc/cron.d

by the modules start script. To make sure unique file names are used I would suggest to use a file name that starts with "module.MODULENAME" with MODULENAME replaced by the actual name of the module the cron job belongs to.

If no specific execution time is required a moduloe developer can simply place a script to be executed in either a hourly, daily, weekly or mothly basis into the appropriate directory of:

/raid/data/module/FaJoCron/system/etc/cron.hourly
/raid/data/module/FaJoCron/system/etc/cron.daily
/raid/data/module/FaJoCron/system/etc/cron.weekly
/raid/data/module/FaJoCron/system/etc/cron.monthly

Changes to the crontab or script files are automatically determined. There is no need to restart the daemon.

Known issues

(none)

Further informationen

• FaJoCron / Changelog