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       fcrontab - manipulate per-user fcrontab     files


       fcrontab [ -c file ] [ -n ] file [ user | -u user ]

       fcrontab [ -c file ] [ -n ] { -l | -r | -e | -z } [ user | -u user ]

       fcrontab [ -h ]


       Fcrontab  is the program intended to install, edit, list and remove the
       tables used by fcron(8) daemon. As fcron internally  uses  a  non-human
       readable  format  (this is needed because fcron saves more informations
       than the user gives, for example the time and date of next  execution),
       the user cannot edit directly his fcrontab (the one used by fcron).

       When  a user installs a fcrontab, the source file is saved in the spool
       directory (/var/spool/fcron) to allow future editions, and a  formatted
       file  is  generated  for the fcron daemon, which is signaled once about
       ten seconds before the next minute for all changes made previously. The
       daemon  is  not  informed of the changes immediately but at most once a
       minute  to  keep  ill  disposed  users  from  blocking  the  daemon  by
       installing  fcrontabs  over and over (ie. denial of service attack). We
       will call "fcrontab" the source file of the fcrontab in the  following.

       A  user  can install a fcrontab if he is listed in the /etc/fcron.allow
       and not (unless by the keyword  all)  listed  in  /etc/fcron.deny  (see
       section  "files"  below).  If neither fcron.allow nor fcron.deny exist,
       all users are allowed. None of these files have to exist, but  if  they
       do, the deny file takes precedence.

       The  first  form of the command is used to install a new fcrontab file,
       from any named file or from standard input if the  pseudo-filename  "-"
       is  given, replacing the previous one (if any): each user can have only
       one fcrontab.

       For  instance,  root  can  create  a  systemwide  fcrontab  file,   say
       /etc/fcrontab,  and  run  "fcrontab  /etc/fcrontab"  to install the new
       version after each change of the  file.  Or  (s)he  can  create  a  new
       fcrontab  running  a  simple  "fcrontab",  and  then  maintain it using
       "fcrontab -e". Same considerations apply to a non privileged user.


       -u user
              Specify the user whose fcrontab will be managed, or "systab" for
              the system fcrontab.  Should only be used by root. If not given,
              the fcrontab file of the user invoking fcrontab will be handled.
              It may be useful since the su(8) command may confuse fcrontab.

              Note: the to a ’-u user’.

       -l     List user’s current fcrontab to standard output.

       -e     Edit  user’s  current fcrontab using either the editor specified
              by the environment variable VISUAL, or EDITOR if VISUAL  is  not
              set. If none or them are set, /usr/bin/vi will be used.

       -r     Remove user’s fcrontab.

       -z     Reinstall user’s fcrontab from its source code. All informations
              fcron may have kept in the binary fcrontab  (such  as  the  last
              execution time and date) will be forgotten (ie. lost).

       -n     Ignore previous version. If this option is not given, fcron will
              try to keep as much information as possible between old and  new
              version of the fcrontab (time and date of next execution, if job
              is in serial queue, etc) if the line hasn’t been modified  (same
              fields, same shell command).

       -c file
              Make  fcrontab  use  config  file file instead of default config
              file /etc/fcron.conf. To interact with a running fcron  process,
              fcrontab must use the same config file as the process. That way,
              several fcron  processes  can  run  simultaneously  on  an  only

       -d     Run  in  debug  mode.  In this mode, many informational messages
              will be output in order to check if anything went wrong.

       -h     Display a brief description of the options.

       -V     Display an informational message about fcrontab,  including  its
              version and the license under which it is distributed.


       Fcrontab returns 0 on normal exit and 1 on error.


       Should be POSIX compliant.


              Configuration  file  for  fcron, fcrontab and fcrondyn: contains
              paths (spool dir, pid file) and default programs to use (editor,
              shell, etc). See fcron.conf(5) for more details.

              Users  allowed  to use fcrontab and fcrondyn (one name per line,
              special name "all" acts for everyone)

              Users who are not allowed to use  fcrontab  and  fcrondyn  (same
              format as allow file)

       /etc/pam.d/fcron (or /etc/pam.conf)
              PAM configuration file for fcron. Take a look at pam(8) for more







       If you’re learning how to use fcron from scratch, I  suggest  that  you
       read  the HTML version of the documentation (if your are not reading it
       right now! :) ): the content is the same, but it is easier to  navigate
       thanks to the hyperlinks.


       Thibault Godouet <>