crontab guru every 30 minutes code example

Example 1: crontab every 30 minutes in specific minute

// every 30 minutes
*/30 * * * *

// it depends on the crontab version you are using
// example: every 30 minutes at number '5'

// mode 1
5,35 * * * *

// mode 2
5/30 * * * *

Example 2: cronjob example

//Specify cron frequency
//e.g. run minute 0, every hour
0 */1 * * *
//enter a bash command to the script input field
//e.g. a wget command where the output isn't saved
wget -O- url_here >> /dev/null