cronTab

{sun:0, every url 17 wed:3, step "at time. specified the fri:5, minute(0-59) all 9,17 1: values extension tue:2, "at http://example.com define hour a chrome example 5th values example.com." sat:6} values separate 2: 9 url thu:4, through ranges open minute on every hour(0-23) new is mon:1, open / at and * example.net." a tab 12:30, crontab in expressions: * 1-5 open example specified week(0-6) 30 */5 , http://example.net which past day from the format: monday 12 - friday, aliases: