Fix capitalization in ubuntu tips doc (#326)

* Fix capitalization in ubuntu tips doc

* add info about virtual env
diff --git a/docs/azure-ubuntu-1804.md b/docs/azure-ubuntu-1804.md
index dcdebce..5921511 100644
--- a/docs/azure-ubuntu-1804.md
+++ b/docs/azure-ubuntu-1804.md
@@ -6,7 +6,7 @@
 the following steps can get you on your way.
 
 ```bash
-# Install azure cli.  See the Azure documentation.
+# Install Azure CLI.  See the Azure documentation.
 # https://docs.microsoft.com/en-us/cli/azure/install-azure-cli-apt?view=azure-cli-latest
 
 # Install Ansible Azure for Python 3.  The main reason these tips were written
@@ -17,3 +17,7 @@
 sudo pip3 install ansible[azure]
 ```
 
+A virtual python environment is not needed in Ubuntu.  The instructions that
+mention that are targeted for Centos 7.  The version of Python 3 and pip3 that
+ship with Ubuntu 18.04 suffice.
+