docs(file-struct): moving the subject to the folder devops

changing the structure of the Readme

subjects/devops/file-struct/README.md

@@ -0,0 +1,47 @@
+## File struct
+
+### Instructions
+
+Create the files and directories so that when you use the command `tree` below, the output will look like this:
+
+```console
+$ tree struct/
+struct/
+├── 0
+├── 1
+├── 2
+├── 3
+│   └── text.txt
+├── 4
+│   └── text2.txt
+├── 5
+├── 6
+├── 7
+├── 8
+├── 9
+└── A
+    └── text3.txt
+```
+
+Once it is done, use the command below to create the file `done.tar` to be submitted.
+
+```console
+$ tar -cf done.tar *
+$ ls
+0  1  2  3  4  5  6  7  8  9  A  done.tar
+```
+
+**Only `done.tar` should be submitted.**
+
+### Hints
+
+In this exercise you wil use the command `tree` to see the file structure as in the example bellow. `tree` is a recursive directory listing program that produces a depth-indented listing of files. With no arguments, `tree` lists the files in the current directory.
+
+You will also need to use the `tar` command which helps to create, extract, and list archive contents. You can find more about the command in the link bellow.
+
+> 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
+
+- [Tar](https://www.gnu.org/software/tar)

subjects/file-struct/README.md

@@ -1,46 +0,0 @@
-## File struct
-
-In order to create new directories or folders in Linux or Unix-like operating systems you need to use the `mkdir` command. `mkdir` stands for “make directory.” you can use it like so:
-
-```console
-User-> mkdir my_folder
-User-> ls
-my_folder
-```
-
-### Instructions
-
-Create the files and directories so that when you use the command `tree` below, the output will look like this:
-
-```console
-User -> tree struct/
-struct/
-├── 0
-├── 1
-├── 2
-├── 3
-│   └── text.txt
-├── 4
-│   └── text2.txt
-├── 5
-├── 6
-├── 7
-├── 8
-├── 9
-└── A
-    └── text3.txt
-```
-
-Once it is done, use the command below to create the file `done.tar` to be submitted.
-
-```console
-User-> tar -cf done.tar *
-User-> ls
-0  1  2  3  4  5  6  7  8  9  A  done.tar
-```
-
-**Only `done.tar` should be submitted.**
-
-**Tips:**
-
-Use the command `man mkdir` to get more info.