crontab(1)						      General Commands Manual							crontab(1)

NAME

       crontab - user job file scheduler

SYNOPSIS

       [file]

       [username]

       [username]

       [username]

DESCRIPTION

       The  command  manages  a  crontab  file	for the user.  You can use a crontab file to schedule jobs that are executed automatically by (see
       cron(1M)) on a regular basis.  The command has four forms:

	      Create or replace your crontab file
				     by copying the specified file, or standard input if file is omitted or is specified as file, into the crontab
				     directory,  The  name  of your crontab file in the crontab directory is the same as your effective user name.
				     If the compartmentalization feature is enabled, the crontab file is your effective user name  followed  by  a
				     colon followed by the compartment id from which the crontab file is created.

	      Edit a copy of the user's crontab file, or create an empty file to
				     edit  if the crontab file does not exist.	When editing is complete, the file will be copied into the crontab
				     directory as the user's crontab file.  If the compartmentalization feature is enabled, it only edits  a  copy
				     of the user's crontab file from the compartment that the crontab files were created from.

	      Lists the user's crontab file.
				     If the compartmentalization feature is enabled, it only lists the crontab files from the compartment that the
				     crontab files were created from.

	      Remove the user's crontab file from the crontab directory.
				     If the compartmentalization feature is enabled, it only removes the crontab files from the  compartment  that
				     the crontab files were created from.

       Only a privileged user can use username following the or options, to edit, list, or remove the crontab file of the specified user.

       The entries in a crontab file are lines of six fields each.  The fields are separated by spaces or tabs.  The lines have the following for-
       mat:

	      minute  hour  monthday  month  weekday  command

       The first five are integer patterns that specify when the sixth field, command, should be executed.  They can have the following ranges	of
       values:

	      minute	     The minute of the hour,

	      hour	     The hour of the day,

	      monthday	     The day of the month,

	      month	     The month of the year,

	      weekday	     The day of the week,

       Each  pattern can be either an asterisk meaning all legal values, or a list of elements separated by commas.  An element is either a number
       in the ranges shown above, or two numbers in the range separated by a hyphen (meaning an inclusive range).  Note that the specification	of
       days can be made in two fields: monthday and weekday.  If both are specified in an entry, they are cumulative.  For example,

       runs  command  at  midnight  on the first and fifteenth of each month, as well as every Monday.	To specify days in only one field, set the
       other field to asterisk For example,

       runs command only on Mondays.

       The sixth field, command (the balance of a line including blanks in a crontab file), is a string that is executed by the shell at the spec-
       ified  times.   A  percent  character in this field (unless escaped by a backslash is translated to a newline character, dividing the field
       into "lines".  Only the first "line" (up to a or end-of-line) of the command field is executed by the shell.  Any other	"lines"  are  made
       available to the command as standard input.

       Blank lines and those whose first non-blank character is will be ignored.

       invokes the command from the user's directory with the POSIX shell, It runs in the queue (see queuedefs(4)).

       supplies a default environment for every shell, defining:

       Users who desire to have their executed must explicitly do so in the crontab entry or in a script called by the entry.

       You  can execute if your name appears in the file If that file does not exist, you can use if your name does not appear in the file If only
       exists and is empty, all users can use If neither file exists, only the user can use The files consist of one user name per line.

   Security Restrictions
       If the compartmentalization feature is enabled, and invoke the jobs from the compartment that the jobs were created from.  Note	that  cre-
       ates  the  job files in Hence, if the command is invoked from a compartment which has no write access to this directory and which disallows
       the privilege, fails to schedule the jobs.  See compartments(5) and privileges(5) for more information.

EXTERNAL INFLUENCES

   Environment Variables
       determines the interpretation of text within file as single and/or multibyte characters.

       determines the language in which messages are displayed.

       If or is not specified in the environment or is set to the empty string, the value of is used as a default for each  unspecified  or  empty
       variable.  If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of

       If  any	internationalization  variable	contains an invalid setting, behaves as if all internationalization variables are set to "C".  See
       environ(5).  determines the editor to be invoked when option is specified.  The default editor is vi.

   International Code Set Support
       Single-byte and multibyte character code sets are supported.

WARNINGS

       Be sure to redirect the standard output and standard error from commands.  If this is not done, any generated standard output  or  standard
       error is mailed to the user.

FILES

       Main cron directory
       List of allowed users
       List of denied users
       Accounting information
       Directory containing the crontab files

SEE ALSO

       sh(1), cron(1M), queuedefs(4), compartments(5), privileges(5).

STANDARDS CONFORMANCE

																	crontab(1)