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

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

SYNOPSIS
     crontab [-u user] file
     crontab [-u user] { -l  -r  -e }
     crontab

DESCRIPTION
     Crontab 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.

     If the allow file exists, then you must be listed therein in order to be
     allowed to use this command.  If the allow file does not exist but the
     deny file does exist, then you must not be listed in the deny file in
     order to use this command.  If neither of these files exists, then
     depending on site-dependent configuration 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:

     -u      Specify 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(1)
             can confuse crontab and that if you are running inside of su(1)
             you should always use the -u option for safety's sake.

     -l      Display the current crontab on standard output.

     -r      Remove the current crontab.

     -e      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.

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

FILES
     /var/cron/allow
     /var/cron/deny

STANDARDS
     The crontab command conforms to IE Std 1003.2 (``POSIX.2'').  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 com-
     mand line.

AUTHORS
     Paul Vixie 

BSD                            December 29, 1993                           BSD