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AdministrativeTasks
600716 Rev A Operating Tasks 2-37
Operaitng Tasks
Each line in a .crontab file must consist of six positional
fields, separated by spaces or tabs, and formatted as follows:
Any of the first five fields can be a list of values separated by
commas. A value is either a number, or a pair of numbers that
are separated by a hyphen. This value indicates that the job is
performed for all the times in the specified range. If a field is an
asterisk character (*), the job is performed for all possible
values of the field.
minutes hours day-of-month month day-of-week command
Field Description
minutes Minutes field. Values range from 0
through 59.
hours Hours field. Values range from 0 through
23.
day-of-month Day of the month. Values range from 1
through 31.
month Month of the year. Values range from 1
through 12.
day-of-week Day of the week. Values range from 0
through 6. Sunday is day 0. For backward
compatibility with older systems, Sunday
can also be specified as day 7.
command Command to be run. A percent character
in this field is translated to a NEWLINE
character. Only the first line (up to a per
cent 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.