Step 6 : Boot the OS
====================

.. tab-set::

   .. tab-item:: Boot the OS

        * In this program, you are going to learn


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                * How to ?


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        Topics in this section,

                * :ref:`Booting Steps <openwrt_rpi_4b_step6_0>`


.. _openwrt_rpi_4b_step6_0:

.. tab-set::

   .. tab-item:: Booting Steps

        * Disconnect the micro SD Card reader from Linux Desktop machine.

        * Insert SD Card to the RPI Board 

        * Then, use serial usb cable to connect the RPI board and Linux Desktop machine.

        * After connecting, check whether ``/dev/ttyUSB0`` created or not.

        .. code-block:: c

                $ ls /dev/ttyUSB0

        * Run minicom to access RPI board

        .. code-block:: c

                $ sudo minicom -D /dev/ttyUSB0 -b 115200            
        
        * Give root for buildroot login and wait for the linux prompt to display.              
                       
        .. code-block:: c

                BusyBox v1.33.2 (2022-02-16 20:29:10 UTC) built-in shell (ash)
 
                  _______                     ________        __
                |       |.-----.-----.-----.|  |  |  |.----.|  |_
                |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
                |_______||   __|_____|__|__||________||__|  |____|
                          |__| W I R E L E S S   F R E E D O M
                -----------------------------------------------------
                OpenWrt 21.02.2, r16495-bf0c965af0
                -----------------------------------------------------
                === WARNING! =====================================
                There is no root password defined on this device!
                Use the "passwd" command to set up a new password
                in order to prevent unauthorized SSH logins.
                --------------------------------------------------
                rootOpenWrt:/ 
                
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        What is /.bashrc file?

        .. dropdown:: See Answer

                * ??