Cron Every Half Hour

Cron Expression

Expression Breakdown

Minute
(0-59)

Hour
(0-23)

Day
(1-31)

Month
(1-12)

Weekday
(0-6)

Field	Value	Meaning
Minute		At minute
Hour		At hour
Day of Month		Day
Month		Month
Day of Week

title: ‘Cron Expression: Cron Every Half Hour’
description: Learn how to create a cron expression for ‘cron every half hour’. Runs
at the top and bottom of every hour with our free cron generator tool.
keywords: cron every half hour, cron expression, cron job, linux cron, unix cron,
cron syntax
cron_expression: 0,30 * * * *
search_keyword: cron every half hour
search_volume: 10
search_rank: 172
example_name: cron every half hour
permalink: “/tools/cron-generator/examples/cron-every-half-hour/”
related_expressions:

keyword: every half hour cron
url: “/tools/cron-generator/examples/cron-every-half-hour/”
—
This cron expression represents: cron every half hour

Cron Expression

0,30 * * * *

What This Expression Does

Runs at the top and bottom of every hour

Use Cases

This cron schedule is commonly used for:

System health monitoring
Report generation
Database maintenance
Cache refresh

How to Use

Copy the cron expression above
Open your crontab with crontab -e
Add a new line with: 0,30 * * * * /path/to/your/script.sh
Save and exit

Alternative Formats

With logging: 0,30 * * * * /path/to/script.sh >> /var/log/cron.log 2>&1
With email notification: 0,30 * * * * /path/to/script.sh || mail -s "Cron job failed" admin@example.com