cron
0 8 * * 0Linux Package Update Check — Sunday 8 AM
“At 08:00, on Sunday”
Weekly check for available OS package updates on Sunday at 8:00 AM. Runs 'apt-get update && apt list --upgradable' or 'yum check-update'. Reports security patches and schedules maintenance window.
Weekly1 per week runs/day
Want to customize this schedule or validate your own cron expression?
Try it live →Field Breakdown
| Field | Value | Meaning |
|---|---|---|
| minute | 0 | 0 |
| hour | 8 | 8 |
| day | * | every day of month |
| month | * | every month |
| weekday | 0 | Sunday |
0
minute
8
hour
*
day
*
month
0
weekday
Common Use Cases
- ✓apt-get update check weekly
- ✓yum check-update Sunday
- ✓Linux security patch report
- ✓OS package audit weekly
Code Examples
Bash / crontab
# Run your script on schedule: 0 8 * * 0 0 8 * * 0 /path/to/your/script.sh
Node.js (node-cron)
import cron from 'node-cron';
cron.schedule('0 8 * * 0', () => {
console.log('Running scheduled task');
});Python (APScheduler)
from apscheduler.schedulers.blocking import BlockingScheduler
scheduler = BlockingScheduler()
@scheduler.scheduled_job('cron', minute='0', hour='8', day_of_week='0')
def my_job():
print('Running scheduled task')
scheduler.start()GitHub Actions Workflow
Generate a ready-to-use .github/workflows/schedule.yml file. Customize the name and download directly.
GitHub Actions
# .github/workflows/schedule.yml
name: Linux Package Update Check — Sunday 8 AM
on:
schedule:
- cron: '0 8 * * 0'
workflow_dispatch: # allow manual trigger
jobs:
run:
runs-on: ubuntu-latest
steps:
- name: Checkout code
uses: actions/checkout@v4
- name: Run scheduled task
run: |
echo "Running on schedule: 0 8 * * 0"
# Add your commands here
Save as .github/workflows/schedule.yml in your repository root
Cron Syntax Quick Reference
| Field | Allowed Values | Special Chars |
|---|---|---|
| minute | 0–59 | * , - / |
| hour | 0–23 | * , - / |
| day of month | 1–31 | * , - / |
| month | 1–12 or JAN–DEC | * , - / |
| day of week | 0–7 or SUN–SAT | * , - / |
Special characters: *= any value ,= list -= range / = step
Related Patterns — Weekly
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Open the Cron Expression Builder →