Update readme

Author: mateuscomh

README.md

@@ -7,5 +7,23 @@ A fast, simple and powerful open-source utility tool for generating, unique and
 Can be used on terminals GNU/Linux and MaCOS
 
 
+---
+## How install and use?
+
+First clone this repositoty
+
+```
+git clone https://github.com/mateuscomh/shellPasswd.git && cd shellPasswd
+```
+Change permission to execute anytime
+```
+sudo chmod +x shellPasswd
+```
+and run on yout terminal with number caracter you wanted in a password 
+```
+./passgen.sh 15
+# or 
+./passgen.sh
+```
 
 **Recommended set alias to be more fast :)**