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CRONTAB(1)                  General Commands Manual                 CRONTAB(1)

NAME
       crontab - User crontab manipulation

SYNOPSIS
       crontab -c [user] file
       crontab -l [user]
       crontab -r [user]
       crontab -p

DESCRIPTION
       The  crontab  program allows users to manipulate their personal crontab
       files.  These files are hidden in /usr/spool/crontabs/user  where  user
       is  the  login name of a given user.  The system daemon cron uses these
       crontabs, among others, to run tasks that are to be repeated at regular
       intervals.   See  crontab(5)  on  what  a good crontab file should look
       like.

       Only the superuser can specify a user name to manipulate the crontab of
       a given user.  Any other user can only touch their own crontab file.

OPTIONS
       -c [user] file
              Install file as the crontab file of user.

       -l [user]
              List the crontab file of user to standard output.

       -r [user]
              Remove the crontab file of user.

       -p     Tell   cron   to   reload   its   tables.    Useful  for  system
              administrators to signal a change to any of the  system  crontab
              files.   Changes  made  by  the  crontab  program  are signalled
              automatically.  (Mnemonic: -p = "ping".)

FILES
       /usr/spool/crontabs/user     Per user personal crontab file.

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

DIAGNOSTICS
       Crontab preparses a new crontab and only installs it if  correct.   All
       errors  are  sent  to  standard  error, messages about installing a new
       table and telling cron to reload are sent to standard output.

BUGS
       Crontab misses a -e option that other implementations of  this  command
       allow  one  to  edit the current crontab and install the result.  Seems
       quite handy until you try to install a new crontab  from  an  automated
       script.   That's  why  this  command  has  a  -c option that installs a
       prepared crontab file.  Use

              crontab -l >/tmp/tab
              ${EDITOR-vi} /tmp/tab
              crontab -c /tmp/tab

       to get the same effect as crontab -e.

AUTHOR
       Kees J. Bot (kjb@cs.vu.nl)

                                                                    CRONTAB(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | SEE ALSO | DIAGNOSTICS | BUGS | AUTHOR