feat(easy-perms): add subject, test and solution for the exercise

sh/tests/easy-perm/example.txt

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+Q. How did the programmer die in the shower?
+A. He read the shampoo bottle instructions: Lather. Rinse. Repeat.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+How many programmers does it take to change a light bulb?
+None – It’s a hardware problem
+
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Why do programmers always mix up Halloween and Christmas?
+Because Oct 31 equals Dec 25.

sh/tests/easy-perm/example2.txt

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+“The best TDD can do, is assure that code does what the programmer thinks it should do. That is pretty good BTW.”
+
+“Simply put, things always had to be in a production-ready state: if you wrote it, you darn well had to be there to get it running!”
+
+“If you think it’s expensive to hire a professional, wait until you hire an amateur.”
+
+“Programming is not a zero-sum game. Teaching something to a fellow programmer doesn’t take it away from you.”
+
+“A phased approach to continuous delivery is not only preferable, it’s infinitely more manageable.”
+
+“So, what do you do?”
+“I’m lean”
+“What?”
+“I’m agile”
+“What?”
+“Fine. I make websites.”

sh/tests/easy-perm_test.sh

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+#!/usr/bin/env bash
+
+# Unofficial Bash Strict Mode
+set -euo pipefail
+IFS='
+'
+script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
+
+challenge() {
+    submitted=$(ls -l "$1" && bash "$script_dirS"/student/easy-perm.sh)
+    expected=$(ls -l "$1" && bash "$script_dirS"/solutions/easy-perm.sh)
+
+    diff <(echo "$submitted") <(echo "$expected")
+}
+
+challenge easy-perm/

sh/tests/solutions/easy-perm.sh

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+chmod 644 easy-perm/example.txt && chmod 746 easy-perm/example2.txt

subjects/devops/easy-perm/README.md

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+## easy-perm
+
+### Instructions
+
+Create a file `easy-perm.sh`, which will change the default permissions for the `example.txt` and `example2.txt` files inside the folder `easy-perms`, to the ones bellow:
+
+Now
+
+Expected Output:
+
+```console
+$ ls -l easy-perm
+total 8
+-rwxr--rw- 1 user user 689 dez 13 16:14 example2.txt
+-rw-r--r-- 1 user user 348 dez 13 16:14 example.txt
+$
+```
+
+### Hints
+
+-`chmod` The chmod, or change mode, command allows an administrator to set or modify a file’s permissions. Every UNIX/Linux file has an owner user and an owner group attached to it, and every file has permissions associated with it. The permissions are as follows: read, write, or execute.
+
+This is what the default permissions looks like when you create a file.
+
+```console
+$ touch example.txt
+$ ls -l example.txt
+-rw-rw-r-- 1 user user 348 dez 13 15:31 example.txt
+$
+```
+
+This is what it looks like if you want to give permissions to read, write and execute to every group.
+
+```console
+$ chmod 777 example.txt
+$ ls -l example.txt
+-rwxrwxrwx 1 user user 348 dez 13 15:31 example.txt
+$
+```
+
+> 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
+
+- [Chmod](https://www.linode.com/docs/guides/modify-file-permissions-with-chmod/#modify-file-permissions-with-chmod)