fix some typos; add comments

site/src/site/sphinx/en/web-console.md

@@ -1,17 +1,17 @@
 Web Console
 ===========
 
-### Info
+### You should know
 
-Arthas supports Web Console. When being attached successfully, users can access it: [http://localhost:8563/](http://localhost:8563/).
+Arthas supports Web Console. When being attached successfully, users can access it at: [http://localhost:8563/](http://localhost:8563/).
 
-Users can fill in the IP and connect to the remote Arthas as:
+Users can fill up the IP and port to connect to the remote Arthas as:
 
 ![web console](_static/web-console-local.png)
 
 ### Basic Authentication 
 
-We can turn to reversed proxy (Nginx) to add basic authentication to ensure security. This can be easily achieved in Unix/Linux/Mac as follows:
+We can turn to reversed proxy (Nginx) to add basic authentication to ensure security. This can be easily achieved in Unix/Linux/Mac. Take Ubuntu 16.04 as an example:
 
 #### Install apache2-utils
 
@@ -26,15 +26,13 @@ sudo apt-get update && sudo apt-get upgrade
 
 ```
 sudo htpasswd -c /etc/apache2/.htpasswd user1
-
 # you will be prompted to enter the password here
 
+# encoded password stored
 $ cat /etc/apache2/.htpasswd
 user1:$apr1$/woC1jnP$KAh0SsVn5qeSMjTtn0E9Q0
 
-# encoded password stored
-
-# another user, no need to use -c option here again
+# add another user, no need to use -c option here again
 sudo htpasswd /etc/apache2/.htpasswd user2
 ```
 
@@ -45,12 +43,14 @@ $ cat /etc/nginx/conf.d/arthas.conf
 
 # after being authenticated, redirected to the proper address
 server {
+  # testing in the same host, use another port to listen;
   listen 8564;
 
   auth_basic "Administrator Area";
   auth_basic_user_file /etc/apache2/.htpasswd;
 
   location / {
+    # after being authenticated, redirect the request to arthas at port: 8563;
     proxy_pass http://localhost:8563/;
   }
 }
@@ -68,7 +68,6 @@ http {
     include /etc/nginx/conf.d/*.conf;
     # ...
 }
-
 ```
 
 Restart Nginx: `sudo service nginx restart`; if there is anything wrong, please check `tail -f -n 100 /var/log/nginx/error.log`.
@@ -82,6 +81,7 @@ Restart Nginx: `sudo service nginx restart`; if there is anything wrong, please
 $ bin/as.sh
 ```
 
-Access `http://127.0.0.1:8564` now. 
+Access [http://127.0.0.1:8564](http://127.0.0.1:8564) now. 
+
 
 If you have suggestions for the Web Console, please leave a message here: [https://github.com/alibaba/arthas/issues/15](https://github.com/alibaba/arthas/issues/15)