refine pages

Author: terrywbrady

session1/run.apache.md

@@ -5,6 +5,8 @@ nextpage: run.mysql
 
 {% include nav.html %}
 
+Apache is a popular web server application.
+
 An [Apache docker image](https://hub.docker.com/_/httpd) is published on Docker Hub.
 
 The following command will start apache.  

session1/run.mysql.md

@@ -39,7 +39,7 @@ docker stop mydb
 ```
 
 ## Run a different version of mysql
-[Available MySql Tags on GitHub](https://hub.docker.com/_/mysql?tab=tags&page=1&ordering=last_updated)
+[Available MySql Tags on DockerHub](https://hub.docker.com/_/mysql?tab=tags&page=1&ordering=last_updated)
 
 Start MySql 5.7 using a tagged version of the MySql Image
 ```

session1/simple.linux.commands.md

@@ -7,7 +7,9 @@ nextpage: run.apache
 
 When a docker image is **run**, it becomes a **docker container**.  
 
-Containers can be started, stopped, and deleted using the **docker** command.
+Docker containers can be *started*, *stopped*, *restarted*, and *removed*. In this exercise we will note what happens to a container during each of these phases.
+
+Containers can be started, stopped, and removed using the **docker** command.
 
 ## Docker Command
 [docker command line reference](https://docs.docker.com/engine/reference/commandline/docker/)