CRONTAB(1) BSD General Commands Manual CRONTAB(1)

NAME
     ccrroonnttaabb - maintain crontab files for individual users (V3)

SYNOPSIS
     ccrroonnttaabb [-uu user] file
     ccrroonnttaabb [-uu user] { -ll | -rr | -ee }

DESCRIPTION
     The ccrroonnttaabb utility is the program used to install, deinstall or list the
     tables used to drive the cron(8) daemon in Vixie Cron.  Each user can
     have their own crontab, and though these are files in /var, they are not
     intended to be edited directly.

     (Darwin note: Although cron(8) and crontab(5) are officially supported
     under Darwin, their functionality has been absorbed into launchd(8),
     which provides a more flexible way of automatically executing commands.
     See launchctl(1) for more information.)

     If the /usr/lib/cron/cron.allow file exists, then you must be listed
     therein in order to be allowed to use this command.  If the
     /usr/lib/cron/cron.allow file does not exist but the
     /usr/lib/cron/cron.deny file does exist, then you must not be listed in
     the /usr/lib/cron/cron.deny file in order to use this command.  If nei-
     ther of these files exists, then depending on site-dependent configura-
     tion parameters, only the super user will be allowed to use this command,
     or all users will be able to use this command.

     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
     third form will process standard input as a new crontab.

     The following options are available:

     -uu      Specify the name of the user whose crontab is to be tweaked.  If
             this option is not given, ccrroonnttaabb examines ``your'' crontab,
             i.e., the crontab of the person executing the command.  Note that
             su(1) can confuse ccrroonnttaabb and that if you are running inside of
             su(1) you should always use the -uu option for safety's sake.

     -ll      Display the current crontab on standard output.

     -rr      Remove the current crontab.

     -ee      Edit the current crontab using the editor specified by the VISUAL
             or EDITOR environment variables.  The specified editor must edit
             the file in place; any editor that unlinks the file and recreates
             it cannot be used.  After you exit from the editor, the modified
             crontab will be installed automatically.

FILES     /usr/lib/cron/cron.allow
     /usr/lib/cron/cron.deny

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

SEE ALSO
     crontab(5), compat(5), cron(8), launchctl(1)

STANDARDS     The ccrroonnttaabb command conforms to IEEE Std 1003.2 (``POSIX.2'').  The new
     command syntax differs from previous versions of Vixie Cron, as well as
     from the classic SVR3 syntax.

AUTHORS     Paul Vixie 

BSD                            December 29, 1993                           BSD