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systemd-crontab-generator(8)


NAME

   systemd-crontab-generator - translate cron schedules in systemd Units

SYNOPSIS

   /lib/systemd/system-generators/systemd-crontab-generator output_folder

DESCRIPTION

   systemd-crontab-generator  is  a  generator  that translates the legacy
   cron files (see FILES) into native systemd units & timers.

   It is not meant to be run  manually,  it  is  called  automatically  by
   systemd.

   It is run

   *      during early boot,

   *      a  second  time  by  cron-after-var.service,  only  if /var is a
          separate  mount,  in  order  to   process   user   crontabs   in
          /var/spool/cron/crontabs; if any,

   *      after each manual updates to the cron files, (*)

   *      and when distribution packages add files in /etc/cron.d/. (*)

   (*): those are monitored by cron-update.path

   systemd-crontab-generator implements the generator specification[1].

FILES

   /etc/crontab
          System crontab, see crontab(5).

   /etc/cron.d
          Directory for system crontabs provided by packages.

   /etc/anacrontab
          See anacrontab(5).

   /var/spool/cron/crontabs
          Directory for users crontabs.

   /run/systemd/generator
          Directory where the generated units are stored.

   /run/crond.reboot
          Flag used to avoid running @reboot jobs again after boot.

   /var/lib/systemd/timers
          Directory  where  systemd  store  time  stamps  needed  for  the
          Persistent feature.

DIAGNOSTICS

   With systemd >= 209, you can execute systemctl list-timers  to  have  a
   overview of timers and know when they will elapse.

   If you get errors like
   /lib/systemd/system-generators/systemd-crontab-generator   failed  with
   error code 1.
   in the journal, you can manually run
   /lib/systemd/system-generators/systemd-crontab-generator /tmp
   to get a more verbose error message.

SEE ALSO

   systemd.cron(7),crontab(5),systemd.unit(5),systemd.timer(5)

NOTES

    1. generator specification
       http://www.freedesktop.org/wiki/Software/systemd/Generators

AUTHOR

   Konstantin Stepanov <me@kstep.me> for the generator
   Alexandre Detiste <alexandre@detiste.be> for this man page



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