1.8 KiB
auto-jobs
Instructions
In this exercise, you will create four files called task1, task2, task3, and task4, which will contain the necessary formulas to set up a group of scheduled tasks in the group
task1:
Time: Every Friday, at 20:41
Command: echo "01"
task2:
Time: Every minute
Command: sh /home/user01/check
task3:
Time: Everyday midnight at 12 AM
Command: sh /home/user01/backup
task4:
Time: After Every Reboot
Command: 01exec
All files content must be in this format:
$ cat task-example | cat -e
* * * * * {command}$
$
Once it is done, use the command below to create the file auto-jobs.tar to be submitted.
$ tar -cf auto-jobs.tar task1 task2 task3 task4
$ ls
task1 task2 task3 task4 auto-jobs.tar
Only auto-jobs.tar should be submitted.
Hints
Linux Cron utility is an effective way to schedule a routine background job at a specific time and/or day on an on-going basis.
You can use the crontab command to manage your jobs. This command can be called in four different ways:
crontab -l: List the jobs for the current user
crontab -r: Remove all jobs for the current users.
crontab -e: Edit jobs for the current user.
Linux Crontab Format:
MIN HOUR DOM MON DOW CMD
Table: Crontab Fields (Linux Crontab Syntax):
Examples:
-
Schedule a job every hour at the fifth minute, every day:
5 * * * * {command} -
Schedule a job 5 minutes after midnight every day:
5 0 * * * {command}
You have to use Man or Google to know more about commands flags, in order to solve this exercise! Google and Man will be your friends!