
anacron is a computer program that performs periodic command scheduling which is traditionally done by cron, but without assuming that the system is running continuously. Thus, it can be used to control the execution of daily, weekly, and monthly jobs (or anything with a period of n days) on systems that don`t run 24 hours a day. anacron was orig....
Found on
http://en.wikipedia.org/wiki/Anacron

Execute commands periodically, does not assume continuously running machine.
Found on
http://www.tldp.org/LDP/intro-linux/html/gloss.html
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