add history command, add chown command and update tail command (#12)

* the history command

* add the chown command

* tail -f

* update readme

* typo

README.md

@@ -51,7 +51,7 @@ Feel free to add new topics in case that you don't find one that you like from t
 * TODO: [025-the-passwd-command.md](ebook/en/content/025-the-passwd-command.md)
 * TODO: [026-the-w-command.md](ebook/en/content/026-the-w-command.md)
 * TODO: [027-the-whoami-command.md](ebook/en/content/027-the-whoami-command.md)
-* TODO: [028-the-history-command.md](ebook/en/content/028-the-history-command.md)
+[028-the-history-command.md](ebook/en/content/028-the-history-command.md)
 * TODO: [029-the-login-command.md](ebook/en/content/029-the-login-command.md)
 * TODO: [030-the-lscpu-command.md](ebook/en/content/030-the-lscpu-command.md)
 * TODO: [031-the-cp-command.md](ebook/en/content/031-the-cp-command.md)
@@ -124,6 +124,7 @@ Feel free to add new topics in case that you don't find one that you like from t
 * TODO: [098-the-cut-command.md](ebook/en/content/098-the-cut-command.md)
 * TODO: [099-the-sed-command.md](ebook/en/content/099-the-sed-command.md)
 * TODO: [100-the-lynx-command.md](ebook/en/content/100-the-lynx-command.md)
+* [101-the-chown-command.md](ebook/en/content/101-the-chown-command.md)
 
 ## 🔗 Links
 

ebook/en/content/005-the-tail-command.md

@@ -32,6 +32,16 @@ You can also omit the `n` flag, this example will also give same result as above
 tail -10 foo.txt  
 ```
 
+### Refresh the output on any new entry in a file
+
+It possible to let tail output any new line added to the file your are looking into. So if a new log entry is written to the file, it will immediately be shown in your output. This can be done via `--follow` or `-f` as option.
+
+Example:
+
+```
+tail -f foo.txt
+```
+
 Syntax:
 
 ```

ebook/en/content/028-the-history-command.md

@@ -1 +1,19 @@
-028-the-history-command.md
+# The `history` command
+
+If you type `history` you will get a list of the last 500 commands used. This gives you the possibility to copy paste commands that you executed in the past.
+
+This is powerful in combination with grep. So you can search for a command in your command history.
+
+### Examples:
+
+1. If you want to search in your history for artisan commands you ran in the past.
+
+```
+history | grep artisan
+```
+
+2. If you only want to show the last 10 commands you can.
+
+```
+history 10
+```

ebook/en/content/101-the-chown-command.md

@@ -0,0 +1,36 @@
+# The `chown` command
+
+The `chown` command makes it possible to change the ownership of a file or directory.  Users and groups are fundamental in Linux, with `chown` you can 
+change the owner of a file or directory. It's also possible to change ownership on folders recursively
+
+### Examples:
+
+1. Change the owner of a file 
+
+```
+chown user file.txt
+```
+
+2. Change the group of a file
+
+```
+chown :group file.txt
+```
+
+3. Change the user and group in one line
+
+```
+chown user:group file.txt
+```
+
+4. Change to ownership on a folder recursively
+
+```
+chown -R user:group folder
+```
+
+### Syntax:
+
+```
+chown [-OPTION] [DIRECTORY_PATH]
+```