Standard POSIX / Crontab Syntax

/30 * * *

“Every 30 Minutes / Half Hour (*/30 * * * *)” — Runs twice an hour: at minute 0 and minute 30. (Her 30 Dakikada Bir (Yarım Saatte Bir))

Crontab 5-Field Breakdown

*/30

Minute

At minute 0 and 30 (*/30)

Hour

Every hour (*)

Day (Month)

Every day (*)

Month

Every month (*)

Day (Week)

Every day of week (*)

Copy-Paste Integration Snippets

Linux (crontab -e)

*/30 * * * * /usr/bin/python3 /opt/scripts/backup.py >> /var/log/cron.log 2>&1

GitHub Actions Workflow

on:
  schedule:
    - cron: '*/30 * * * *'

Kubernetes (CronJob Spec)

apiVersion: batch/v1
kind: CronJob
metadata:
  name: scheduled-task
spec:
  schedule: "*/30 * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: runner
            image: alpine
          restartPolicy: OnFailure

Diğer Popüler Cron Zamanlamaları

* * * * *(Her Dakika Başı)

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

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

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

0 * * * *(Her Saat Başı)

0 */2 * * *(Her 2 Saatte Bir)

0 */6 * * *(Her 6 Saatte Bir (Günde 4 Kez))

0 */12 * * *(Her 12 Saatte Bir (Günde 2 Kez))

0 0 * * *(Her Gece Yarısı (00:00))

Frequently Asked Questions