CRON(8) - System Manager’s Manual # CRON(8) - System Manager’s Manual
NAME # cron - clock daemon
SYNOPSIS # cron [-n] [-l load_avg]
DESCRIPTION # The cron daemon schedules commands to be run at specified dates and times. Commands that are to be run periodically are specified within crontab(5) files. Commands that are only to be run once are scheduled via the at(1) and batch(1) commands. Normally, the cron daemon is started from the /etc/rc command script.
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CRONTAB(1) - General Commands Manual # CRONTAB(1) - General Commands Manual
NAME # crontab - maintain crontab files for individual users
SYNOPSIS # crontab [-u user] file
crontab [-e | -l | -r] [-u user]
DESCRIPTION # crontab is the program used to install, deinstall, or list the tables used to drive the cron(8) daemon. Each user can have their own crontab(5), and though these are files in /var/cron/tabs, they are not intended to be edited directly.
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CRONTAB(5) - File Formats Manual # CRONTAB(5) - File Formats Manual
NAME # crontab - tables for driving cron
DESCRIPTION # A crontab file contains instructions to the cron(8) daemon of the general form: “at these times on these dates run this command”. There may be a system crontab and each user may have their own crontab. Commands in any given crontab will be executed either as the user who owns the crontab or, in the case of the system crontab, as the user specified on the command line.
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Accton,
Fsck,
Makewhatis,
Calendar,
Locate,
Crontab,
Sa,
Security,
Whatis,
Dump,
Yp,
Cron,
Ac,
Rdist,
Daily DAILY(8) - System Manager’s Manual # DAILY(8) - System Manager’s Manual
NAME # daily, weekly, monthly - periodic system maintenance
DESCRIPTION # The three files /etc/daily, /etc/weekly, and /etc/monthly are shell scripts run on a periodic basis by the clock daemon, cron(8). They take care of some basic administrative tasks. Their output, if any, is mailed to root.
Note: The scripts are all run as part of root’s crontab(5). However, it is strongly suggested that the root mail account be an alias that forwards messages to a real user or set of users.
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