A cron program is one which runs unattended jobs (not necessarily involving dynamite) on a computer at regular pre-set times.
The GNU package mcron (Mellor's cron) is a 100% compatible replacement for Vixie cron. It is written in pure Guile, and allows configuration files to be written in scheme (as well as Vixie's original format) for infinite flexibility in specifying when jobs should be run.
The package was originally conceived, developed and produced by DMBCS, and the copyright was assigned to GNU in the very early days, as it should form a key part of the GNU system performing regular house-keeping tasks. These days it is officially in the custodianship of the maintainers of the excellent GUIX distribution, in which it plays that key role. The GNU maintenance page is over here.
A historical white paper, reproduced here, describes the motivation and initial design concepts of mcron.
The current sources which we maintain at DMBCS can be downloaded by typing
Documentation is an integral part of the mcron package. Once
installed, the user can type
mcron, or, in a pinch,
mcron --help at the
command-line to get information in various amounts and
The full manual can be read online here.
Please click here if you wish to send us a message, for help or support, or even just to let us know that you are successfully using this software!
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We will happily consider contributions to the source code if you provide the address of a GIT repository we can pull from, and will consider all bug reports and feature requests made to the above contact form.
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This page was last modified March, 2020
This page is http://rdmp.org/dmbcs/mcron.