Cron Every 30 Minutes
Cron expression */30 * * * * means Every 30 minutes.
Cron expression to run a job every 30 minutes: */30 * * * *. Runs at :00 and :30 of every hour — good for periodic syncs and digest emails.
Cron Expression
Common use cases
- Digest notification emails
- Periodic database sync jobs
- Session cleanup and expiry
Want to customize this schedule?
Open it in the visual builder to tweak the expression interactively.
Open in BuilderNeed to monitor this cron job?
Cronhub tracks your scheduled jobs and alerts you if they fail or run late.
Platform usage examples
# Edit your crontab
crontab -e
# Add this line to run every 30 minutes
*/30 * * * * /usr/bin/php /var/www/html/script.php
# Or run a shell script
*/30 * * * * /home/user/scripts/job.sh >> /var/log/job.log 2>&1# .github/workflows/scheduled.yml
name: Scheduled Job
on:
schedule:
- cron: '*/30 * * * *'
jobs:
run:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- name: Run job
run: echo "Running every 30 minutes"apiVersion: batch/v1
kind: CronJob
metadata:
name: my-scheduled-job
spec:
schedule: "*/30 * * * *"
jobTemplate:
spec:
template:
spec:
containers:
- name: job
image: my-image:latest
restartPolicy: OnFailureRelated developer tools
More free tools for engineering workflows that pair with scheduled jobs:
Frequently asked questions
What is the cron expression for every 30 minutes?
The cron expression is */30 * * * *. Cron expression to run a job every 30 minutes: */30 * * * *. Runs at :00 and :30 of every hour — good for periodic syncs and digest emails.
How do I schedule a cron job to run every 30 minutes in Linux?
Open your crontab with "crontab -e" and add a new line: */30 * * * * /path/to/your/script.sh — this schedules your script to run every 30 minutes. Save and exit; the cron daemon picks up the change immediately.
What does the cron expression "*/30 * * * *" mean?
Cron expression to run a job every 30 minutes: */30 * * * *. Runs at :00 and :30 of every hour — good for periodic syncs and digest emails.
Can I use "*/30 * * * *" in GitHub Actions?
Yes. In your workflow YAML, set the schedule trigger: on: schedule: - cron: '*/30 * * * *'. GitHub Actions uses standard 5-field Unix cron syntax, so this expression works as-is.