Update 'README.md'

README.md

@@ -32,3 +32,22 @@
 # default username/password
 username : pi  
 password : raspberry  
+
+!important change the default password
+
+    passwd
+
+create a new users
+
+    sudo useradd NEWUSERNAME
+    sudo passwd NEWUSERNAME  
+
+add user to sudoers  
+
+    sudo usermod -aG sudo USERNAME
+
+
+
+
+
+