rpm -qa | grep pvm
If the PVM software is not installed, then find them on the install CDs. Each Red Hat install CD typically has a directory named RedHat/RPMS/ that has all the RPM packages. Mount the CD that has the pvm rpm packages, change directory to the right directory on the CD and then issue the following commands as superuser:
rpm -ivh pvm*
Or if you are using the GUI, you can just double click on the pvm RPMs to install the packages.
We have created custom packages of the PVM software for these distributions that have some enhancements. We recommend that you replace the stock packages with the ones available on our website. See the information on local PVM packages here: http://cs.boisestate.edu/~amit/teaching/430/CS430.html#sec11