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]

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, they are not intended to be edited directly.

       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.

       If the -u option is given, 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.

       The -l option causes the current crontab to be displayed on standard output.

       The -r option causes the current crontab to be removed.

       The -e 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.

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

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 <>



4th Berkeley Distribution                29 December 1993                              CRONTAB(1)