Index for Section 8

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cron(8)
NAME
  cron - The system clock daemon

SYNOPSIS
  /usr/sbin/cron

DESCRIPTION
  The cron daemon runs shell commands at specified dates and times.  Commands
  that are to run according to a regular or periodic schedule are found
  within the crontab files.  Commands that are to run once only are found
  within the at files.	You submit crontab and at file entries by using the
  crontab and at commands.  Because the cron process exits only when killed
  or when the system stops, only one cron daemon should exist on the system
  at any given time.  Normally, you start the cron daemon from within a run
  command file.

  During process initialization and when cron detects a change, it examines
  the crontab and at files.  This strategy reduces the overhead of checking
  for new or changed files at regularly scheduled intervals.  The cron
  command creates a log of its activities.  The cron daemon must be started
  from the system startup scripts because it must begin execution without a
  login user ID set.  The cron daemon starts each job with the following
  process attributes stored with the job by the invoking process:

    ·  Login user ID

    ·  Effective and real user IDs

    ·  Effective and real group IDs

    ·  Supplementary groups

  It also establishes the following attributes from the authentication
  profile of the account associated with the login user ID of the invoking
  process:

    ·  Audit control and disposition masks

    ·  Kernel authorizations

DIAGNOSTICS
  The at and batch programs will refuse to accept jobs submitted from
  processes whose login user ID is different from the real user ID.

FILES
  /usr/sbin/cron
	    Specifies the command path.

  /var/adm/cron
	    Main cron directory

  /var/spool/cron/crontabs
	    Directory containing the crontab files.

  /var/adm/cron/cron.allow
	    List of allowed users.

  /var/adm/cron/cron.deny
	    List of denied users

  /var/adm/cron/log
	    History information for cron

  /var/adm/cron/queuedefs
	    Queue description file for at, batch, and cron

RELATED INFORMATION
  Commands:  at(1), crontab(1), rc0(8), rc2(8), rc3(8)

  Files: queuedefs(4)

Index for Section 8

Alphabetical listing for C

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