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Annotation of 43BSDReno/usr.sbin/cron/cron.8, revision 1.1

1.1     ! root        1: .\"    @(#)cron.8      6.6 (Berkeley) 6/24/90
        !             2: .\"
        !             3: .TH CRON 8 "June 24, 1990"
        !             4: .AT 3
        !             5: .SH NAME
        !             6: cron \- clock daemon
        !             7: .SH SYNOPSIS
        !             8: .B cron
        !             9: .SH DESCRIPTION
        !            10: .I Cron
        !            11: executes commands at specified dates and times
        !            12: according to the instructions in the files
        !            13: /etc/crontab and /etc/crontab.local.
        !            14: None, either one, or both of these files may be present.
        !            15: Since
        !            16: .I cron
        !            17: never exits,
        !            18: it should only be executed once.
        !            19: This is best done by running
        !            20: .I cron
        !            21: from the initialization
        !            22: process through the file
        !            23: /etc/rc;
        !            24: see
        !            25: .IR init (8).
        !            26: .PP
        !            27: The
        !            28: crontab files
        !            29: consist of lines of seven fields each.
        !            30: The fields are separated by spaces or tabs.
        !            31: The first five are integer patterns to specify:
        !            32: .in +2m
        !            33: .TP 2m
        !            34: \(bu
        !            35: minute (0-59)
        !            36: .nr .0 \n()Pu
        !            37: .nr )P 0
        !            38: .TP 2m
        !            39: \(bu
        !            40: hour (0-23)
        !            41: .TP 2m
        !            42: \(bu
        !            43: day of the month (1-31)
        !            44: .TP 2m
        !            45: \(bu
        !            46: month of the year (1-12)
        !            47: .TP 2m
        !            48: \(bu
        !            49: day of the week (1-7 with 1 = Monday)
        !            50: .nr )P \n(.0u
        !            51: .in -2m
        !            52: .LP
        !            53: Each of these patterns may contain:
        !            54: .in +2m
        !            55: .TP 2m
        !            56: \(bu
        !            57: a number in the range above
        !            58: .nr .0 \n()Pu
        !            59: .nr )P 0
        !            60: .TP 2m
        !            61: \(bu
        !            62: two numbers separated by a minus
        !            63: meaning a range inclusive
        !            64: .TP 2m
        !            65: \(bu
        !            66: a list of numbers separated by
        !            67: commas meaning any of the numbers
        !            68: .TP 2m
        !            69: \(bu
        !            70: an asterisk meaning all legal values
        !            71: .nr )P \n(.0u
        !            72: .in -2m
        !            73: .LP
        !            74: The sixth field is a user name: the
        !            75: command will be run with that user's uid and permissions.
        !            76: The seventh field consists of all the text
        !            77: on a line following the sixth field,
        !            78: including spaces and tabs;
        !            79: this text is treated as a command
        !            80: which is executed by the Shell at the
        !            81: specified times.
        !            82: A percent character (``%'')
        !            83: in this field is translated to a new-line
        !            84: character.
        !            85: .PP
        !            86: Both
        !            87: crontab files are checked by
        !            88: .I cron
        !            89: every minute, on the minute.
        !            90: .SH FILES
        !            91: /etc/crontab
        !            92: .br
        !            93: /etc/crontab.local

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