Linux Shell Scripting Cookbook - Third Edition

How it works...

An asterisk (*) specifies that the command should be executed at every instance during the given time period. A * in the Hour field in the cron job will cause the command to be executed every hour. To execute the command at multiple instances of a time period, specify the time intervals separated by a comma in this time field. For example, to run the command at the 5^th and 10^th minute, enter 5,10 in the Minute field. A slash (divide by) symbol will cause the command to run as per a division of the time. For example 0-30/6 in the Minutes field will run a command every 5 minutes during the first half of each hour. The string */12 in the Hours field will run a command every other hour.

Cron jobs are executed as the user who created ...