docs: update optional commands section

Signed-off-by: Ajay Bhargav <[email protected]>

Author: ajaybhargav

docs/book/api/system/command_proc.rst

@@ -28,6 +28,8 @@ Available commands
 +-------------------+--------------------------------------------------------+
 | echo              | Display line of text                                   |
 +-------------------+--------------------------------------------------------+
+| free              | Display free and used memory in the system             |
++-------------------+--------------------------------------------------------+
 | cat               | Display file on standard output                        |
 +-------------------+--------------------------------------------------------+
 | mkdir             | Make directory                                         |
@@ -36,6 +38,8 @@ Available commands
 +-------------------+--------------------------------------------------------+
 | mv                | Move file or directory                                 |
 +-------------------+--------------------------------------------------------+
+| format            | Format device/filesystem                               |
++-------------------+--------------------------------------------------------+
 | logout            | Logout current user                                    |
 +-------------------+--------------------------------------------------------+
 | help              | Get command help                                       |
@@ -49,7 +53,42 @@ application.
 
 Following is the list of Commands with modules.
 
-*TODO: optional command list to be added*
++-----------+--------------------------------------+--------------------------------------------------------+
+| Command   | Module                               | Description                                            |
++===========+======================================+========================================================+
+| wget      |  :doc:`Utility <../utils/index>`     | Download file from web to filesystem                   |
++-----------+--------------------------------------+--------------------------------------------------------+
+| load      |  :doc:`Utility <../utils/index>`     | Download file on module via Console (Xmodem)           |
++-----------+--------------------------------------+--------------------------------------------------------+
+| dload     |  :doc:`Utility <../utils/index>`     | Download file from module via Console (Xmodem)         |
++-----------+--------------------------------------+--------------------------------------------------------+
+| gpsinfo   |  :doc:`GPS <../peri/gps>`            | Get GPS realtime information                           |
++-----------+--------------------------------------+--------------------------------------------------------+
+| gpscmd    |  :doc:`GPS <../peri/gps>`            | Send command to GPS module                             |
++-----------+--------------------------------------+--------------------------------------------------------+
+| gpsbaud   |  :doc:`GPS <../peri/gps>`            | Change gps baudrate                                    |
++-----------+--------------------------------------+--------------------------------------------------------+
+| btman     |  :doc:`Blutooth <../peri/bluetooth>` | Bluetooth manager command                              |
++-----------+--------------------------------------+--------------------------------------------------------+
+| spifs     |  :doc:`SPIFS <../peri/spifs>`        | Manage SPI filesystem                                  |
++-----------+--------------------------------------+--------------------------------------------------------+
+| fota      |  :doc:`FOTA <fota>`                  | Download firmware over the air                         |
++-----------+--------------------------------------+--------------------------------------------------------+
+| rdbg      |  :doc:`Remote DBG <rdbg>`            | Initiate a remote debug session                        |
++-----------+--------------------------------------+--------------------------------------------------------+
+| ntpdate   |  :doc:`NTP Client <../proto/ntpc>`   | Get date from NTP server and sync                      |
++-----------+--------------------------------------+--------------------------------------------------------+
+
+Following commands are available on 4G modules only
+
++-------------------+--------------------------------------------------------+
+| Command           | Description                                            |
++===================+========================================================+
+| ifconfig          | Get network device information                         |
++-------------------+--------------------------------------------------------+
+| ping              | Send ICMP ECHO REQUEST to network host                 |
++-------------------+--------------------------------------------------------+
+
 
 Custom commands
 ^^^^^^^^^^^^^^^