The historyInfo.sh (Linux) or historyInfo.bat (Windows) command can be used to view the installation directory for installed products, the products that are installed, and the version of each installed product.

${WAS_INSTALL_ROOT}/bin/historyInfo.sh

First, the root directory of the product, version, DTD, and Installation Manager logs will be listed.

Installation
------------------------------------------------------------------------
Product Directory   /opt/IBM/WebSphere/AppServer
Version Directory   /opt/IBM/WebSphere/AppServer/properties/version
DTD Directory       /opt/IBM/WebSphere/AppServer/properties/version/dtd
Logs Directory      /var/ibm/InstallationManager/logs

Next, the products installed in the product directory will be listed. This will not include other IBM products that are installed in some other product directory.

Product List
-----------------------
BASE          installed
JAVA8         installed

Lastly, information about each installed product will be listed.

Installed Product
----------------------------------------------------------------------
Name                   IBM WebSphere Application Server
Version                9.0.0.7
ID                     BASE
Build Level            cf071808.01
Build Date             3/2/18
Package                com.ibm.websphere.BASE.v90_9.0.7.20180302_0440
Architecture           x86_64 (64 bit)
Installed Features     WebSphere Application Server traditional
                       EJBDeploy tool for pre-EJB 3.0 modules
                       Embeddeble EJB container
                       Stand-alone thin clients and resource adapters

Installed Product
----------------------------------------------------------------------
Name                   IBM SDK, Java Technology Edition, Version 8
Version                8.0.5.7
ID                     JAVA8
Build Level            pxa6480sr5fp7-20171216_01
Build Date             12/16/17
Architecture           x86_64 (64 bit)