Man page - systemd-crontab-generator(8)

Packages contains this manual

Package:  systemd-cron
apt-get install systemd-cron

Manuals in package:
• anacrontab(5)
• crontab(5)
• crontab(1)
• systemd-crontab-generator(8)
• systemd.cron(7)
Documentations in package:
• systemd-cron

Manual

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SYSTEMD-CRONTAB-GENERATO (8) System Manager’s Manual SYSTEMD-CRONTAB-GENERATO (8)

NAME

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

SYNOPSIS

/usr/lib/systemd/system-generators/systemd-crontab-generator output-dir

DESCRIPTION

systemd-crontab-generator is a systemd.generator (7) translating classic cron “FILES” into native systemd.timer (5)/ systemd.service (5) pairs.

It runs automatically

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during early boot,

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

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after each update to /etc/crontab † and /etc/anacrontab †, and

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when packages add files under /etc/cron.d †

(†: monitored by cron-update.path ).

FILES
/etc/crontab

Administrator’s system crontab, see crontab (5).

/etc/cron.d

System crontabs managed by packages live here.

/etc/anacrontab

anacrontab (5)

/var/spool/cron/crontabs

Users’ crontabs live here.

/run/systemd/generator

Automatically generated units go here.

/run/crond.reboot

If this file exists, @reboot jobs aren’t re-generated. Managed automatically.

/var/lib/systemd/timers

systemd.timer (5)s with the Persistent flag set store their timestamps here.

DIAGNOSTICS

systemctl list-timers shows an overview of current timers and when they’ll elapse.

If you see something to the effect of

/usr/lib/systemd/system-generators/systemd-crontab-generator failed with error code 1.

in the journal, you can run /usr/lib/systemd/system-generators/systemd-crontab-generator /tmp/test for more verbose output.

SEE ALSO

crontab (5), systemd.unit (5), systemd.timer (5), systemd.cron (7) systemd-cron 2.5.1-2 2023-08-13 SYSTEMD-CRONTAB-GENERATOR (8)

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