0 8 * * *
│ │ │ │ │
│ │ │ │ └─── Day of week: * (every day)
│ │ │ └───── Month: * (every month)
│ │ └─────── Day of month: * (every day)
│ └───────── Hour: 8 (at hour 8, 8:00 AM)
└─────────── Minute: 0 (at minute 0)

0 8 * * * /usr/bin/python3 /scripts/generate-daily-report.py

0 8 * * * /usr/bin/python3 /scripts/sync-external-data.py

0 8 * * * /usr/bin/python3 /scripts/refresh-cache.py

0 8 * * * /usr/bin/node /app/send-daily-digest.js

# generate-daily-report.py
import json
from datetime import datetime, timedelta
import smtplib
from email.mime.text import MIMEText

def generate_daily_report():
    # Generate report data
    report = {
        'date': datetime.now().strftime('%Y-%m-%d'),
        'summary': 'Daily operations summary',
        'metrics': {
            'total_users': 1250,
            'active_sessions': 890,
            'revenue': 12500.00
        }
    }
    
    # Save report
    with open(f'/var/reports/daily_{datetime.now().strftime("%Y%m%d")}.json', 'w') as f:
        json.dump(report, f, indent=2)
    
    # Send email
    msg = MIMEText(json.dumps(report, indent=2))
    msg['Subject'] = f'Daily Report - {datetime.now().strftime("%Y-%m-%d")}'
    msg['From'] = 'reports@example.com'
    msg['To'] = 'team@example.com'
    
    # Send via SMTP (configure as needed)
    # smtp = smtplib.SMTP('smtp.example.com')
    # smtp.send_message(msg)
    
    print(f"{datetime.now()}: Daily report generated and sent")

if __name__ == '__main__':
    generate_daily_report()

# sync-external-data.py
import requests
import json
from datetime import datetime
import sqlite3

def sync_external_data():
    try:
        response = requests.get(
            'https://api.external.com/daily-data',
            timeout=300,
            headers={'Authorization': 'Bearer YOUR_TOKEN'}
        )
        response.raise_for_status()
        data = response.json()
        
        conn = sqlite3.connect('/var/data/app.db')
        cursor = conn.cursor()
        
        for item in data:
            cursor.execute('''
                INSERT OR REPLACE INTO external_data 
                (id, data, updated_at) 
                VALUES (?, ?, ?)
            ''', (item['id'], json.dumps(item), datetime.now()))
        
        conn.commit()
        conn.close()
        
        print(f"{datetime.now()}: Synced {len(data)} records")
    except Exception as e:
        print(f"{datetime.now()}: Sync failed: {e}")

if __name__ == '__main__':
    sync_external_data()