crontab man page on HP-UX

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crontab(1)							    crontab(1)

       crontab - user job file scheduler





       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 stan‐
				     dard input if file is omitted or is spec‐
				     ified  as	file,  into the crontab direc‐
				     tory, The name of your  crontab  file  in
				     the crontab directory is the same as your
				     effective user name.  If the  compartmen‐
				     talization	 feature  is  enabled, crontab
				     file may contain compartment information.

	      Edit a copy of the user's crontab file, or create an empty  file
				     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 compart‐
				     mentalization 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 format:

	      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

	      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	speci‐
       fied  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

       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 compart‐
       ment 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.

   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	speci‐
       fied.  The default editor is vi.

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

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

       The  behavior  of cron(1M) is undefined if a non existent monthday of a
       month is specified in the crontab entry.	 For example,  the  dates  29,
       30,  and 31 do not occur in all months of a year, so jobs should not be
       scheduled for these days for the months in which they do not occur.

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

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


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