How to start EM Console service explicitly?

Enterprise Manager console is the basic console to perform the health checkups, check ports and so on for Oracle Application Server. One of the easiest way to access the EM console (if you dont know the exact URL or port number) is by accessing the HTTP Server home page and clicking the Login to IAS Admin Console link. If the EM console is not started then you will see Page cannot be displayed error.

Now, you can check the status of the EM console using the command ./emctl status iasconsole (Execute this command in the location $ORACLE_HOME/bin) - This is for LINUX system
If it is not started, use this command to do so ./emctl start iasconsole and the output will be shown as below.

[oracle@hostname bin]$ ./emctl start iasconsole
TZ set to Asia/Calcutta
Oracle Enterprise Manager 10g Application Server Control Release 10.1.4.3.0
Copyright (c) 1996, 2006 Oracle Corporation.  All rights reserved.
http:// hostname:7018/emd/console/aboutApplication
Starting Oracle Enterprise Manager 10g Application Server Control ...... started successfully.
[oracle@hostname bin]$

Integration of E-Business Suite 12.x with Oracle Single Sign-on Server 10.1.4.3 in real time

Not many people talk about real time aspects of any integrations and the configurations involved. However, I would like to bring a small point which is vital for integrating E-Business Suite 12.x with Oracle Single Sign-On Server 10.1.4.3.
Lets assume E-Business suite is running on 2 nodes and OSSO server on 2 other nodes (nodes imply different machines or different instances in same machine) in production mode. In real time mode, you will be accessing the OSSO server console/application using a virtual hostname (instead of individual hostname) and same is the case for E-Business suite. For integrating OSSO with E-Business Suite, we will run a perl script txkrun.pl which registers E-Business Suite as partner application in OSSO server. The question is whether to run the script in both nodes of E-Business suite or just single node. The answer is single node as the script will pick up values from profile options that are in the database (A person called Atul helped me in this concept).

The runtime inputs to be provided for the perl script txkrun.perl is shown below:
$FND_TOP/bin/txkrun.pl -script=SetSSOReg

Enter the host name where Oracle iAS Infrastructure database is installed ? Virtual Hostname of OSSO Server (not to get confused as it specifies Infrastructure database hostname)
Enter the LDAP Port on Oracle Internet Directory server ? 389 (default port is 389, if you have customized the ports, then specify it)
Enter SSL LDAP Port on Oracle Internet Directory server ? 636 (default port is SSL, if you have customized the ports, then specify it)
Enter the Oracle Internet Directory Administrator (orcladmin) Bind password ? (OID administrator password)
Enter the instance password that you would like to register this application instance with ? (mostly this password is same as OID admin password)
Enter Oracle E-Business apps database user password ? (EBS apps user password)