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69 lines
1.8 KiB
69 lines
1.8 KiB
2 years ago
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## auto-jobs
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### Instructions
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In this exercise you will create different files `task1`, `task2`, `task3`, `task4` containing the formulas required for setup a group of Scheduled tasks in the group.
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##### task1:
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Time: `Every Friday, at 20:41`
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Command: `echo "01"`
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##### task2:
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Time: `Every minute`
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Command: `sh /home/user01/check`
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##### task3:
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Time: `Everyday midnight at 12 AM`
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Command: `sh /home/user01/backup`
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##### task4:
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Time: `After Every Reboot`
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Command: `01exec`
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All files content must be in this format:
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```console
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$ cat task-example | cat -e
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* * * * * {command}$
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$
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```
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Once it is done, use the command below to create the file `auto-jobs.tar` to be submitted.
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```console
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$ tar -cf auto-jobs.tar task1 task2 task3 task4
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$ ls
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task1 task2 task3 task4 auto-jobs.tar
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```
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**Only `auto-jobs.tar` should be submitted.**
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### Hints
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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.
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You can use the `crontab` command to manage your jobs. This command can be called in four different ways:
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`crontab -l`: List the jobs for the current user
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`crontab -r`: Remove all jobs for the current users.
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`crontab -e`: Edit jobs for the current user.
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##### Linux Crontab Format:
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`MIN HOUR DOM MON DOW CMD`
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##### Table: Crontab Fields (Linux Crontab Syntax):
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##### Examples:
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1. Schedule a job every hour at the fifth minute, every day: `5 * * * * {command}`
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2. Schedule a job 5 minutes after midnight every day: `5 0 * * * {command}`
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> You have to use Man or Google to know more about commands flags, in order to solve this exercise!
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> Google and Man will be your friends!
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### References
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- [an editor for cron schedule expressions](https://crontab.guru/).
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