Q. Starting parallel virtual machine?

To initialize PVM on any host on that PVM has been installed we can type 

% pvm

The PVM console known as pvm is a standalone PVM task which allows the user to interactively start, modify and query the virtual machine. Then we can add hosts to virtual machine by typing at console prompt (got after last command)

pvm> add hostname

To delete hosts (except the one we are employing) from virtual machine we can type

pvm> delete hostname

We can see the configuration of present virtual machine we can type 

pvm> conf

To see what PVM tasks are running on virtual machine we must type

 pvm> ps -a

To close the virtual machine environment we must type 

pvm> halt

More than one host can be added concurrently by typing hostnames in a file one per line and then type

% pvm hostfile

Then PVM will add all listed hosts simultaneously before console prompt appears.