Cron generator

Free

Explain, validate and build expressions; next runs by time zone and conversion to systemd, Windows, Kubernetes and GitHub.

Cron expression

5 fields (minute hour day month weekday), macros like @daily or a 6–7 field Quartz expression.

minute

hour

day of month

month

1-5

weekday

A las 02:30, de lunes a viernes

No run in the coming years.

Correct

Command

Name

User (optional, for /etc/cron.d)

crontab -e

30 2 * * 1-5 /usr/bin/flock -n /tmp/mi-tarea.lock /usr/local/bin/mi-script.sh >> /var/log/mi-tarea.log 2>&1

Includes flock (no overlapping runs), logging to /var/log and escaped %.

No extras

30 2 * * 1-5 /usr/local/bin/mi-script.sh