CRON(8) GENIX Programmer's Manual CRON(8)
NAME
cron - clock daemon
SYNOPSIS
/etc/cron
DESCRIPTION
Cron executes commands at specified dates and times according to the
instructions in the file /usr/lib/crontab. Since cron never exits,
it should only be executed once. This is best done by running cron
from the initialization process through the file /etc/rc; see
init(8).
Crontab consists of lines of six fields each. The fields are
separated by spaces or tabs. The first five are integer patterns to
specify the minute (0-59), hour (0-23), day of the month (1-31),
month of the year (1-12), and day of the week (1-7 with 1=Monday).
Each of these patterns may contain a number in the range above; two
numbers separated by a minus meaning a range inclusive; a list of
numbers separated by commas meaning any of the numbers; or an aster-
isk meaning all legal values. The sixth field is a string that is
executed by the Shell at the specified times. A percent character
in this field is translated to a new-line character. Only the first
line (up to a % or end of line) of the command field is executed by
the Shell. The other lines are made available to the command as
standard input.
Crontab is examined by cron every minute.
FILES
/usr/lib/crontab
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