alias should set in .bashrc

Merges https://github.com/espressif/esp-idf/pull/2097

docs/en/get-started/linux-setup.rst

@@ -57,7 +57,7 @@ ESP32 toolchain for Linux is available for download from Espressif website:
 
     .. note::
 
-        If you have ``/bin/bash`` set as login shell, and both ``.bash_profile`` and ``.profile`` exist, then update ``.bash_profile`` instead.
+        If you have ``/bin/bash`` set as login shell, and both ``.bash_profile`` and ``.profile`` exist, then update ``.bash_profile`` instead. In CentOS, ``alias`` should set in ``.bashrc``.
 
 3.  Log off and log in back to make the ``.profile`` changes effective. Run the following command to verify if ``PATH`` is correctly set::