Install Websphere 8.5 IBM Installation Manager silently in preferred location

Download the Installation Manager zip file from IBM site.

Will explain the steps first and give a script to automate this.

unzip the files in desired location.

Edit the install.xml to define the preferred location during silent install.

Original install.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<agent-input clean='true' temporary='true'>
<server>
<repository location='.'/>
</server>
<install>
<offering features='agent_core,agent_jre' id='com.ibm.cic.agent' version='1.6.2000.20130301_2248'/>
</install>
</agent-input>


Modified File:
<agent-input clean='true' temporary='true'>
<profile id='IBM Installation Manager' kind='self'>
<data key='installLocation' value='/websphere8.5/InstallationManager/eclipse'/>
</profile>
<server>
<repository location='.'/>
</server>
<install>
<offering profile='IBM Installation Manager' features='agent_core,agent_jre' id='com.ibm.cic.agent' version='1.6.2000.20130301_2248'/>
</install>
</agent-input>
The below lines has been added 





<profile id='IBM Installation Manager' kind='self'>
<data key='installLocation' value='/websphere_8/InstallManager/eclipse'/>
</profile>

And also in offering attribute profile='IBM Installation Manager' is added

Now execute the below command to do silent install of IBM installation Manager
 ./installc -log /tmp/install.txt -sP -acceptLicense
                 25%                50%                75%                100%
------------------|------------------|------------------|------------------|
............................................................................
Installed com.ibm.cic.agent_1.6.2000.20130301_2248 to the<mentioned directory in install.xml>
cat /tmp/install.txt should contain the following lines if installation is successfull
<?xml version="1.0" encoding="UTF-8"?>
<result>
</result>

Shell script to automate the above steps:
cd <IIM agent path>
unzip agent*.zip
sed -i "2 a\<profile id='IBM Installation Manager' kind='self'>" install.xml
sed -i "3 a\<data key='installLocation' value='/websphere8.5/InstallationManager/eclipse'/>" install.xml
sed -i "4 a\</profile>" install.xml
/installc -log /tmp/install.txt -sP -acceptLicense