DEV-3920 feat(auto-jobs) add subject and tests for auto-jobs exercise

sh/tests/auto-jobs_test.sh

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+#!/usr/bin/env bash
+
+# Unofficial Bash Strict Mode
+set -euo pipefail
+IFS='
+'
+
+print_content() {
+	mkdir -p uncompressed
+	tar -xpf auto-jobs.tar -C uncompressed
+	cat -e uncompressed/$1
+}
+
+for i in 1 2 3 4
+do
+    submitted=$(cd student && print_content task$i)
+    expected=$(cd solutions && print_content task$i)
+
+    diff <(echo "$submitted") <(echo "$expected")
+done

subjects/devops/auto-jobs/README.md

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+## auto-jobs
+
+### Instructions
+
+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.
+
+##### 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:
+
+```console
+$ cat task-example | cat -e
+* * * * * {command}$
+$
+```
+
+Once it is done, use the command below to create the file `auto-jobs.tar` to be submitted.
+
+```console
+$ 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):
+
+![Table: Crontab Fields](https://assets.01-edu.org/devops-branch/cronTasks-Table.png)
+
+##### Examples:
+
+1. Schedule a job every hour at the fifth minute, every day: `5 * * * * {command}`
+
+
+2. 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!
+
+### References
+
+- [an editor for cron schedule expressions](https://crontab.guru/).