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 m[blue]generator specificationm[][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.
NOTES
- 1.
-
generator specification
AUTHOR
Konstantin Stepanov <[email protected]> for the generatorAlexandre Detiste <[email protected]> for this man page