## SYNOPSIS

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

## 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.

           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.

## SEE ALSO

           crontab(5), cron(8)

## FILES

           /var/spool/cron/allow
           /var/spool/cron/deny

## STANDARDS

           The   crontab  command  conforms  to  IEEE  Std1003.2-1992
           (``POSIX'').  This new command syntax differs from  previ