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The file /etc/anacrontab describes the jobs controlled by anacron(8).
Its lines can be of three kinds: job-description lines, environment
assignments, or empty lines.
Job-description lines are of one of these two forms:
period delay job-identifier command
@period_name delay job-identify command
The period is specified in days, the delay in minutes. If the RAN-
DOM_DELAY environment variable is set, then a random value between 0
and RANDOM_DELAY minutes will be added to the start up delay of the
jobs. For example a RANDOM_DELAY set to 12 would therefore add, ran-
domly, between 0 and 12 minutes to the user defined delay. The job-
identifier can contain any non-blank character, except slashes. It is
used to identify the job in Anacron messages, and as the name for the
job's timestamp file. The command can be any shell command. The fields
can be seperated by blank spaces or tabs. The period_name can be set
to daily, weekly, monthly, yearly or annualy. This will ensure jobs are
run once a week, month or year no matter the number of days in this
Environment assignment lines are of the form:
VAR = VALUE
Spaces around VAR are removed. No spaces around VALUE are allowed
(unless you want them to be part of the value). The assignment takes
effect from the next line to the end of the file, or to the next
assignment of the same variable. The enviroment variable
START_HOURS_RANGE sets the time frame, when the job could started.
Empty lines are either blank lines, line containing white-space only,
or lines with white-space followed by a '#' followed by an arbitrary
You can continue a line onto the next line by ending it with a '\'.
In case there is need for having anacron off, then it can be done by
adding cron job 0anacron into /etc/cron.hourly/jobs.deny which is part
This example shows how to set up the behaviour similar to previous set-
ting in /etc/crontab which will start all regular jobs only between
6:00 and 8:00. There is added RANDOM_DELAY which will be maximally 30
minutes. Jobs will be running in queue. After one finish, then next
The Anacron README file.
Itai Tzur <email@example.com>
Currently maintained by Pascal Hakim <pasc@(debian.org|redel-
For Fedora maintained by Marcela Maslanova <firstname.lastname@example.org>.
Marcela Maslanova 2009-08-17 ANACRONTAB(5)