Finding installations of IBM MQ on a system

If we have multiple IBM MQ installations on a system, we can check which versions are installed and where they are.

We can use the following methods to find the IBM MQ installations on your system:

Use the dspmqver command. This command does not provide details of all installations on a system if it is issued from a Version 7.0.1 installation.
Use the platform installation tools to query where IBM MQ has been installed. Then use the dspmqver command from a Version 7.1 or later installation. The following commands are examples of commands we can use to query where IBM MQ has been installed:
- On AIX systems, we can use the lslpp command:
```
lslpp -R ALL -l mqm.base.runtime
```
- On HP-UX systems, we can use the swlist command:
```
swlist -a location -a revision -l product MQSERIES
```
- On Linux systems, we can use the rpm command:
```
rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE}\t%{INSTPREFIXES}\n" | grep MQSeriesRuntime
```
- On Solaris systems, we can use the pkginfo and pkgparam commands:
  1. List the installed packages by entering the following command:
```
pkginfo | grep -w mqm
```
  2. For each package listed, enter following command:
```
pkgparam pkgname BASEDIR
```
- On Windows systems, we can use the wmic command. This command might install the wmic client:
```
wmic product where "(Name like '%MQ%') AND (not Name like '%bitSupport')" get Name, Version, InstallLocation
```
On UNIX and Linux systems, issue the following command to find out where IBM MQ has been installed:
```
cat /etc/opt/mqm/mqinst.ini
```
Then use the dspmqver command from a Version 7.1 or later installation.
To display details of installations on the system, on 32-bit Windows, issue the following command:
```
reg.exe query "HKEY_LOCAL_MACHINE\SOFTWARE\IBM\WebSphere MQ\Installation" /s
```

On 64-bit Windows, issue the following command:

reg.exe query "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\IBM\WebSphere MQ\Installation" /s

Note: the reg.exe command will only display information for Version 7.1 or later installations.