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CRONTAB(1)							    CRONTAB(1)



NAME
       crontab - maintain crontab files for individual users (ISC Cron V4.1)

SYNOPSIS
       crontab [-u user] file
       crontab [-u user] [-l | -r | -e] [-i] [-s]

DESCRIPTION
       Crontab	is  the	 program used to install, deinstall or list the tables
       used to drive the cron(8) daemon in ISC Cron.  Each user can have their
       own  crontab,  and though these are files in /var/spool/ , they are not
       intended to be edited directly. For SELinux in mls  mode	 can  be  even
       more crontabs - for each range. For more see selinux(8).

       If the cron.allow file exists, then you must be listed therein in order
       to be allowed to use this command.  If the  cron.allow  file  does  not
       exist but the cron.deny file does exist, then you must not be listed in
       the cron.deny file in order to use this command.	 If neither  of	 these
       files  exists, only the super user will be allowed to use this command.


OPTIONS
       -u     It specifies the name  of	 the  user  whose  crontab  is	to  be
	      tweaked.	 If  this option is not given, crontab examines "your"
	      crontab, i.e., the crontab of the person executing the  command.
	      Note  that su(8) can confuse crontab and that if you are running
	      inside of su(8) you should always use the -u option for safety's
	      sake.   The  first form of this command is used to install a new
	      crontab from some named file or standard input  if  the  pseudo-
	      filename "-" is given.

       -l     The current crontab will be displayed on standard output.

       -r     The current crontab will be removed.

       -e     This option is used to edit the current crontab using the editor
	      specified by the VISUAL or EDITOR environment variables.	 After
	      you exit from the editor, the modified crontab will be installed
	      automatically.

       -i     This option modifies the -r option to  prompt  the  user	for  a
	      'y/Y' response before actually removing the crontab.

       -s     It will append the current SELinux security context string as an
	      MLS_LEVEL setting to the crontab file before editing /  replace-
	      ment  occurs - see the documentation of MLS_LEVEL in crontab(5).

SEE ALSO
       crontab(5), cron(8)

FILES
       /etc/cron.allow
       /etc/cron.deny

STANDARDS
       The crontab command conforms to IEEE Std1003.2-1992 (''POSIX'').	  This
       new  command  syntax  differs  from previous versions of Vixie Cron, as
       well as from the classic SVR3 syntax.

DIAGNOSTICS
       A fairly informative usage message appears if you run  it  with	a  bad
       command line.

AUTHOR
       Paul Vixie <vixie@isc.org>



4th Berkeley Distribution      15 September 2011		    CRONTAB(1)
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