How to enable the Enterprise Manager for SOA Suite

I found out that for some reason, on Linux the EM is not configured to start after installation of SOA Suite on Oracle Application Server 10.1.3.1 For those of you who want to use the Enterprise Manager, follow the following steps to get the EM started:

Be careful when editing files, make sure you have made a backup of the files.

1. Edit the file: default-web-site.xml in the $OC4J home/config folder
   Search for the following line and change ohs-routing from false to true
   application="ascontrol" name="ascontrol" load-on-startup="true" root="/em" ohs-routing="true"
   
2. Edit the file: server.xml in the $OC4J/home config folder
   Search for the following line and change start van false in true
   application name="ascontrol" path="../../home/applications/ascontrol.ear" parent="system" start="true"
3. That’s all. Just restart your Oracle Application Server:
   $ORACLE_HOME/opmn/bin/opmnctl stopall
   $ORACLE_HOME/opmn/bin/opmnctl startall
4. Now you should be able to browse to the Enterprise Manager.
   http://servername:[http_port]/em
   

If you for some reason forgot the http port, just look at the file:
$ORACLE_HOME/install/readme.txt