Description:

Fcron is a periodical command scheduler which aims at replacing Vixie
Cron, so it implements most of its functionalities. But fcron does not
assume that your system is running neither all the time nor regularly:
you can, for instance, tell fcron to execute tasks every x hours y
minutes of system up time or to do a job only once in a specified
interval of time. You can also set a nice value to a job, run it
depending on the system load average and much more !