Fix docs and adding petalinux login credentials

docs/source/pynq_remote/quickstart.rst

@@ -42,7 +42,9 @@ Step 2: Prepare and Boot the Target Device
 * Create a PYNQ.remote image using the instructions in :doc:`image_build`.
 * Flash the image to your SD card (see :doc:`../appendix/sdcard` for instructions on how to flash the image).
 * Insert the SD card and power on the device (make sure it is connected to your network).
-* Wait for the device to boot up. You can check the device's IP address using a serial console (e.g. `minicom <https://help.ubuntu.com/community/Minicom>`_ or `PuTTY <https://www.putty.org/>`_) or by checking your router's DHCP client list.
+* Wait for the device to boot up. You can check the device's IP address using a serial console (e.g. `minicom <https://help.ubuntu.com/community/Minicom>`_ or `PuTTY <https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html>`_) or by checking your router's DHCP client list. 
+
+Be aware that the default login credentials have changed with Petalinux. The username is `petalinux`. On first boot, you will be prompted to set a new password.
 
 .. note::
 

docs/source/pynq_sd_card.rst

@@ -232,34 +232,17 @@ Unmount images before building again
 Sometimes the SD image building process can error out, leaving mounted images
 in your host OS. You need to unmount these images before trying the make
 process again. Starting from image v2.6, users can do the following to
-unmount the images.
+unmount and delete the failed images, and remove all the previously
+built images at different stages:
 
 .. code-block:: console
 
    cd <PYNQ repository>/sdbuild/
-   make delete
-
-The above command not only unmounts all the images, but also deletes the
-failed images. This makes sure the users do not use the failed images when
-continuing the SD build process.
-
-To unmount images but not delete them, use the following command instead.
+   make clean
 
-.. code-block:: console
-
-   cd <PYNQ repository>/sdbuild/
-   make unmount
 
 If you want to ignore all the previous staged or cached SD build
-artifacts and start from scratch again, you can use the following command.
-This will unmount and delete the failed images, and remove all the previously
-built images at different stages.
-
-.. code-block:: console
-
-   cd <PYNQ repository>/sdbuild/
-   make clean
-
+artifacts and start from scratch again, you can use the command above.
 
 Retargeting to a Different Board
 ================================

sdbuild/README.md

@@ -72,7 +72,7 @@ source /home/user/petalinux/settings.sh
 ```
 
 Ensure that the prebuilt pynq sdist and rootfs tarballs are in the `sdbuild/prebuilt` 
-folder, then build your image:
+folder named `pynq_sdist.tar.gz` and `pynq_rootfs.<arch>.tar.gz` , then build your image:
 
 ```
 cd sdbuild