Remove logins via serial console

src/freedombone-utils-setup

@@ -409,6 +409,13 @@ function limit_user_logins {
     fi
 }
 
+function remove_serial_logins {
+    if grep 'ttyS' /etc/securetty; then
+        cp /etc/securetty /etc/securetty_old
+        sed -i '/ttyS/d' /etc/securetty
+    fi
+}
+
 function setup_firewall {
     function_check create_completion_file
     create_completion_file
@@ -433,6 +440,9 @@ function setup_utils {
     read_config_param "PROJECT_REPO"
     write_config_param "PROJECT_REPO" "$PROJECT_REPO"
 
+    function_check remove_serial_logins
+    remove_serial_logins
+
     function_check set_max_login_tries
     set_max_login_tries 10