Linux Administration Bootcamp: Go from Beginner to Advanced - Scheduling Repeated Jobs with Cron

The video tutorial explains the Cron service, a time-based job scheduling system used for automating tasks. It covers the Cron tab command, which configures when commands are executed. The tutorial details the time specification fields and how to use them, including examples of scheduling tasks. It also discusses advanced scheduling techniques, such as using multiple values and ranges, and introduces shortcuts and keywords for Cron tabs. Finally, it explains how to manipulate Cron jobs using Crontab commands, including listing, editing, and removing jobs.

What is the primary function of the Cron service?

• To provide network security

• To monitor system performance

• To schedule and run jobs at specified times

• To manage user accounts

Which of the following fields is NOT part of the Crontab time specification?

• Minutes

• Seconds

• Day of the month

• Month

How can you schedule a Cron job to run every 15 minutes?

• Use 0, 15, 30, 45 in the minutes field

• Use 0-15 in the minutes field

• Use 15/0 in the minutes field

• Use 15* in the minutes field

What happens to the output of a Cron job by default?

• It is discarded

• It is mailed to the user

• It is displayed on the screen

• It is saved to a log file

Which shortcut can be used to schedule a job to run once a year?

• Monthly

• Yearly

• Daily

• Weekly

What command is used to edit existing Cron jobs?

• crontab -l

• crontab -d

• crontab -e

• crontab -r

How can you disable a specific Cron job without deleting it?

• Use the crontab -d command

• Use the crontab -r command

• Remove the job from the Crontab file

• Comment out the job in the Crontab file