Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (HP-UX-11.11)
Apropos / Subsearch:
optional field

 crontab(1)							  crontab(1)

      crontab - user job file scheduler

      crontab [file]

      crontab -e [username]

      crontab -l [username]

      crontab -r [username]

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

	   crontab [file]	   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, /var/spool/cron/crontabs.	 The
				   name of your crontab file in the crontab
				   directory is the same as your effective
				   user name.

	   crontab -e [username]   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.

	   crontab -l [username]   Lists the user's crontab file.

	   crontab -r [username]   Remove the user's crontab file from the
				   crontab directory.

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

      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

	   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

 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000

 crontab(1)							  crontab(1)

	   minute	  The minute of the hour, 0-59

	   hour		  The hour of the day, 0-23

	   monthday	  The day of the month, 1-31

	   month	  The month of the year, 1-12

	   weekday	  The day of the week, 0-6, 0=Sunday

      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,

	   0   0   1,15	  *   1	  command

      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,

	   0   0   *   *   1   command

      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
      specified 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

      cron invokes the command from the user's HOME directory with the POSIX
      shell, (/usr/bin/sh).  It runs in the c queue (see queuedefs(4)).

      cron supplies a default environment for every shell, defining:


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

 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000

 crontab(1)							  crontab(1)

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

    Environment Variables
      LC_CTYPE determines the interpretation of text within file as single-
      and/or multi-byte characters.

      LC_MESSAGES determines the language in which messages are displayed.

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

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

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

      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.

      /var/adm/cron		    Main cron directory
      /var/adm/cron/cron.allow	    List of allowed users
      /var/adm/cron/cron.deny	    List of denied users
      /var/adm/cron/log		    Accounting information
      /var/spool/cron/crontabs	    Directory containing the crontab files

      sh(1), cron(1M), queuedefs(4).

      crontab: SVID2, SVID3, XPG2, XPG3, XPG4

 Hewlett-Packard Company	    - 3 -   HP-UX Release 11i: November 2000