Update tomcat_installation.MD

Tomcat/tomcat_installation.MD

@@ -5,7 +5,7 @@
 1. EC2 instance with Java v1.8.x 
 
 ### Install Apache Tomcat
-we are going to download tomcat packages from  https://tomcat.apache.org/download-80.cgi onto /opt on EC2 instance
+Download tomcat packages from  https://tomcat.apache.org/download-80.cgi onto /opt on EC2 instance
 ```sh 
   # create tomcat directory
   cd /opt
@@ -24,34 +24,34 @@ create link files for tomcat startup.sh and shutdown.sh
   tomcatup
 ```
 #### check point :
-access tomcat application from browser on prot 8080
+access tomcat application from browser on prot 8080  
 http://<Public_IP>:8080
 
-Using unique ports for each application is a best practice in a environment. But tomcat and Jenkins runs on ports number 8080. Hence lets change tomcat cat port number to 8090. To change port number we should update server.xml file which is in conf directory under tomcat home
+Using unique ports for each application is a best practice in an environment. But tomcat and Jenkins runs on ports number 8080. Hence lets change tomcat port number to 8090. Change port number in conf/server.xml file under tomcat home
 ```sh
 cd /opt/apache-tomcat-8.5.35/conf
 # update port number in the "connecter port" field in server.xml
-#restart tomcat after configuration update
+# restart tomcat after configuration update
 tomcatdown
 tomcatup
 ```
 #### check point :
-access tomcat application from browser on prot 8090
+access tomcat application from browser on prot 8090  
 http://<Public_IP>:8090
 
-now application is accessible on port 8090. but if you try to login to tomcat from the browser it doesn’t allow. you need to change some default parameters in context.xml
+now application is accessible on port 8090. but tomcat application doesnt allow to login from browser. changing a default parameter in context.xml does address this issue
 ```sh
 #search for context.xml
 find / -name context.xml
 ```
-above command gives 3 context.xml files. Out of 3, 2 files resides on webapp directory. We should comment (<!-- & -->) `Value ClassName` field on files which are under webapp directory. 
-restart tomcat services to take this effect
+above command gives 3 context.xml files. comment (<!-- & -->) `Value ClassName` field on files which are under webapp directory. 
+After that restart tomcat services to effect these changes
 ```sh 
 tomcatdown
 tomcatup
 ```
 Update users information in the tomcat-users.xml file
-goto tomcat home directory and Add below users to tomcat-user.xml file under conf directory
+goto tomcat home directory and Add below users to conf/tomcat-user.xml file
 ```sh
 	<role rolename="manager-gui"/>
 	<role rolename="manager-script"/>
@@ -61,5 +61,5 @@ goto tomcat home directory and Add below users to tomcat-user.xml file under con
 	<user username="deployer" password="deployer" roles="manager-script"/>
 	<user username="tomcat" password="s3cret" roles="manager-gui"/>
 ```
-Restart serivce and try to login to tomcat application from the browser
+Restart serivce and try to login to tomcat application from the browser. This time it should be Successful