Standard POSIX / Crontab Syntax

/20 * * *

“Every 20 Minutes (*/20 * * * *)” — Executes every 20 minutes (at minute 0, 20, and 40). (Her 20 Dakikada Bir)

Live Interactive Crontab Translator & Evaluator

Cron Expression Translator & Next Run Schedule

Dedicated Guide

Crontab Expression (5 fields):

Minute

0-59

Hour

0-23

Day (Month)

1-31

Month

1-12

Day (Week)

0-6 (Sun-Sat)

Human Readable Meaning:

Executes every 20 minutes (at minute 0, 20, and 40).

Her 20 dakikada bir (0, 20, 40. dakikalarda) çalışır.

Quick Presets:

Next 5 Scheduled Executions

1.Sun, Sep 20, 00:00

2.Sun, Sep 20, 00:20

3.Sun, Sep 20, 00:40

4.Sun, Sep 20, 01:00

5.Sun, Sep 20, 01:20

Ready Crontab Line

*/20 * * * * /usr/bin/python3 /opt/scripts/backup.py

Crontab 5-Field Breakdown

*/20

Minute

Every 20th minute (*/20)

Hour

Every hour (*)

Day (Month)

Every day (*)

Month

Every month (*)

Day (Week)

Every day of week (*)

Copy-Paste Integration Snippets

Linux (crontab -e)

*/20 * * * * /usr/bin/python3 /opt/scripts/backup.py >> /var/log/cron.log 2>&1

GitHub Actions Workflow

on:
  schedule:
    - cron: '*/20 * * * *'

Kubernetes (CronJob Spec)

apiVersion: batch/v1
kind: CronJob
metadata:
  name: scheduled-task
spec:
  schedule: "*/20 * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: runner
            image: alpine
          restartPolicy: OnFailure

Other Popular Cron Schedules

* * * * *(Her Dakika Başı)

*/2 * * * *(Her 2 Dakikada Bir)

*/3 * * * *(Her 3 Dakikada Bir)

*/5 * * * *(Her 5 Dakikada Bir)

*/10 * * * *(Her 10 Dakikada Bir)

*/15 * * * *(Her 15 Dakikada Bir (Çeyrek Saatte Bir))

*/30 * * * *(Her 30 Dakikada Bir (Yarım Saatte Bir))

*/45 * * * *(Her 45 Dakikada Bir)

0 * * * *(Her Saat Başı)

Frequently Asked Questions