Cron Every 8 Hours

Understanding the Expression

The cron expression 0 */8 * * * breaks down as follows:

Field	Value	Meaning
Minute	0	At minute 0
Hour	*/8	Every 8 hours
Day of month	*	Every day of the month
Month	*	Every month
Day of week	*	Every day of the week

Example Usage

Basic crontab entry

0 */8 * * * /path/to/your/script.sh

With output logging

0 */8 * * * /path/to/script.sh >> /var/log/script.log 2>&1

With monitoring

0 */8 * * * /path/to/script.sh && curl -fsS https://cronsignal.io/ping/YOUR_CHECK_ID

Common Use Cases for Every 8 Hours

• Data synchronization: Sync data between systems periodically
• Batch processing: Process accumulated records in batches
• Report generation: Generate periodic status reports
• Cleanup tasks: Remove temporary files and stale data